Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Seasonal Abundance of Mosquitoes in Jizan Province
1
13
EN
Mamdouh
I.
Nassar
Department of Entomology, Faculty of Science, Cairo University, Cairo, Egypt
Reda
F. A.
Bakr
-Department of Entomology, Faculty of Science, Ain Shams University, Cairo, Egypt
-Department of Biology, Faculty of Science and arts, Baisha University, Baisha, KSA
redabakr55@gmail.com
Mohammed
S.
Abdeldayem
Virology Sector, VACSERA-Egypt
Nehad
M.
El-Barky
Department of Entomology, Faculty of Science, Benha University, Al Qalyubia, Egypt
nehad.mohmed@yahoo.com
Thorayia
F.
Kotb
Department of Entomology, Faculty of Science, Ain Shams University, Cairo, Egypt
10.21608/eajbsa.2016.12850
Effect of climatic factors on mosquitoes abundance in Jizan province was studied through this research reporting that rainfall rate was the most effective and significant factor (P>0.01, r= 0.459), as well as, the presence of two peaks of mosquito activity which were attained yearly (February–April and July–September) after a rainy season in the frequently visited sites. On the other hand, mosquito activity was increased in occasionally visited sites in winter rather than that of summer season.
Mosquitoes,seasonal abundance,Jizan
https://eajbsa.journals.ekb.eg/article_12850.html
https://eajbsa.journals.ekb.eg/article_12850_7d77582af2a4b4671e86ccb4af2b0c49.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Seasonal dynamics of the two spotted red spider mite, Tetranychus urticae Koch on two field crops in Qalubyia governorate, Egypt.
15
24
EN
Nawal
M.
Shanbaky
Entomology Department, Faculty of Science, Ain Shams University
Nadia
Helmy
Entomology Department, Faculty of Science, Ain Shams University
d.nadyahelmy@yahoo.com
Mohammed
H.
El-Erksousy
Plant Protection Research Institute, Agriculture ResearchCenter
Manal
H.
Ibraheem
Plant Protection Research Institute, Agriculture ResearchCenter
10.21608/eajbsa.2016.12851
The seasonal dynamics of <em>Tetranychus urticae </em>Kochon clover and cotton crops were investigated at Qaha research Station, Qalubyia governorate, Egypt during two successive years, 2013 and 2014. Infestation of clover and cotton started in January and June, respectively. The monthly collected number and percent occurrence of eggs and most movable life stages gradually increased to reach peaks in March and September then decreased in next month(s) at the end of the season of each clover and cotton, respectively. Eggs were the most abundant life stage of the total stages collected in each month and adult females predominated males and most other movable life stages monthly collected throughout the clover and cotton season in each year. Generally, the annual number of each life stage of <em>T. urticae</em>infested each of the clover and cotton was higher in 2014 than 2013 and on clover than cotton in each year.
Laboratory rearing of <em>T. urticae</em>on leaf discs of each clover and cotton at three different temperatures (15, 25 and 35˚C) and a relative humidity of 69±10 % showed that change of temperatures greatly affected development and reproduction of this mite. At 15˚C, no eggs were laid and development of the whole life cycle was arrested. However, development from egg to adult was accelerated by increasing temperature from 25 to 35˚C which shortened the durations of development of immature stages, life cycle, adult female reproductive period (longevity) and life span. Fecundity and fertility were higher at 25˚C than 35˚C on each of clover and cotton and were the highest on clover at 25˚C.
Tetranychus urticae,Seasonal dynamics,biology,Temperature
https://eajbsa.journals.ekb.eg/article_12851.html
https://eajbsa.journals.ekb.eg/article_12851_42d31e35839911ce7536f540852c939e.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Implications of Some Constant Temperatures on Certain Biological Aspects of the Grapevine Aphid, Aphis illinoisensis Shimer (Homoptera:Aphididae)
25
32
EN
El-Gantiry
Aziza
M.
Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt.
Asmaa
A. A.
Fadl
Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt.
S.
F. M.
Moussa
Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt.
10.21608/eajbsa.2016.12852
The effect of temperature on certain biological aspects and fertility life table of the grapevine aphid as a key of abiotic factor has been investigated. The experiments were conducted at four constant temperatures 17, 21, 24 and 27°C, 65 ± 5 % R.H. and 14 hrs. photophase. The tested individuals were reared and observed on young shoots of <em>Vitis vinifera</em> (Superior variety). The data revealed that aphids developed faster with increasing temperatures within the 17 - 27 °C range. The grapevine aphid passed through four instars before reaching maturity. The nymphal development period varied significantly between temperatures, they lasted 15.5, 12.2, 7.3 and 5.4 days at 17, 21, 24 and 27°C, respectively. The theoretical lower developmental threshold (t<sub>0</sub>) was 12.4 °C and 80.73 day-degrees were required for aphids to reach adulthood. The life table parameters differed at the tested temperatures. These parameters clarified the temperature effect on <em>A</em>. <em>illinoisensis</em> biology, where the largest R<sub>o, </sub>λ and r<sub>m</sub> were 6.30, 1.155 and 1.088 at 24, 24 and 21 °C, respectively. The range of generation time values (GT) recorded 27.39-10.53 days at the tested temperatures. As a result from the aspect of development and fecundity,<em> A. illinoisensis </em>had the best performance on 24°C and the worst on 17 and 27°C.
Grapevine Aphid,Aphis illinoisensis,biological aspects,Life cycle,Temperature,day-degrees
https://eajbsa.journals.ekb.eg/article_12852.html
https://eajbsa.journals.ekb.eg/article_12852_fd00f16be3f60d679244c7840600f67b.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Virulence of Entomopathogenic Nematodes Steinernema glaseri and Heterorhabditis bacteriophora Poinar (HP88 strain) Against the Black Cutworm, Agrotis ipsilon.
33
48
EN
Heba
A.
Hassan
Cotton Leafworm Research Department, Plant Protection Research Institute, A. R. C., Egypt.
Souad
A.
Shairra
Biological Control Research Department, Plant Protection Research Institute, A.R.C., Egypt.
Samah
S.
Ibrahim
Cotton Leafworm Research Department, Plant Protection Research Institute, A. R. C., Egypt.
10.21608/eajbsa.2016.12853
Virulence of entomopathogenic nematodes, <em>Steinernema glaseri</em> and <em>Heterorhabditis bacteriophora</em> Poinar (HP88 strain) were studied against 3<sup>rd</sup>, 4<sup>th</sup>, 5<sup>th</sup> and 6<sup>th</sup> instar larvae of the black cutworm, <em>Agrotis ipsilon</em>. The observed mortality caused by the both tested nematodes at different time intervals was recorded. The establishment of nematodes in a host depends greatly on its ability to manage host defences so, the host haemocyte interaction with entomopathogenic nematodes were observed by encapsulation, nodule formation and phagocytosis processes. Phagocytosis is known to stimulate production of lysosomal enzymes. Acid phosphatase acts as a lysosome marker so; the activity and the pattern of acid phosphatase during the course of infection were recorded. Also, total protein and protein pattern were screened. Results indicated that, the two nematodes had variable significantly effects. <em>S. glaseri</em> recorded a highly significantly affect than <em>H. bacteriophora</em>. In addition, there are relationship between mortality rate and time exposure of <em>S. glaseri</em> and <em>H. bacteriophora</em> against 3<sup>rd</sup>, 4<sup>th</sup>, 5<sup>th</sup> and 6<sup>th</sup> larval instars of <em>A. ipsilon</em> i.e. the time exposure increased the susceptibility also increased. At the lower concentration, fourth and/or fifth instars were the most susceptible instars to <em>S. glaseri</em> ,while the 3<sup>rd </sup>and 4<sup>th</sup> instar larvae were most vulnerable instars to the infection with<em> H. bacteriophora</em>. Results was recorded that, six haemocyte types were identified in <em>A. ipsilon</em> 6<sup>th</sup> instar larvae: prohaemocytes, plasmatocytes, granulocytes, spherulocytes, oenocytoids, and adipohaemocytes. <em>S. glaseri </em>in <em>A. ipsilon</em> escape encapsulation and overcome host immunity faster than<em> H. bacteriophora </em>which recognized by host haemocytes. Prohemocytes, plasmatocytes or granulocytes are phagocytic cells in <em>A. ipsilon</em> 6<sup>th</sup> instar larvae. Phagocytosis was expressed in <em>A. ipsilon</em> haemocytes infected with<em> H. bacteriophora</em> at a higher rate compared with <em>S. glaseri</em>infection. Data demonstrated both <em>S. glaseri</em> and<em> H. bacteriophora</em> induced a significant decrease in total protein contents after 24hrs from infection. While, there was significant increase in acid phosphatase activity after 6 hrs of infected groups of <em>S. glaseri</em> and<em> H. bacteriophora</em>. This increase may be due to phagocytosis processes which recorded in the present study at this time because phagocytosis is known to stimulate production of lysosomal enzymes. There is an acid phosphatise band detected only in <em>H. bacteriophora</em> and <em>S. glaseri</em> samples with Rf 0.86 after 6 and 12hrs from infection. This band may refer to nematodes exudates which contain high amount of this enzyme that the nematodes can easily penetrate and digest host tissues. There is a characterestic band of <em>S. glaseri</em> protein pattern with Mw 47KDa. It was identified as surface coat protein of <em>S. glaseri</em> which play important roles in defeating the host immune system by its antiphagocytic activity.
biological control,Agrotis ipsilon,Steinernema glaseri,Heterorhabditis,bacteriophora,haemocyte types,Phagocytic activity,acid phosphatase,Protein pattern
https://eajbsa.journals.ekb.eg/article_12853.html
https://eajbsa.journals.ekb.eg/article_12853_a2ff3fab9eda8e53f61606380502d2f1.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Biological Aspects of the Cunaxid mite, Pulaeus pseudominutus When Fed on Different Diets at Different Temperatures
49
55
EN
Abdein
Mahmoud
Khalil
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt
10.21608/eajbsa.2016.12854
This study aimed to study the effect of different diets mainly free living nematode, <em>Rhabditella muscicola</em> and two different fungi (<em>Fusarium oxysporum</em> Schlecht and <em>Pythium spinosum</em> Sawada) on the different biological aspects of the cunaxid mite, <em>Pulaeus pseudominutus</em> at 20, 25, 30 and 35<span style="text-decoration: underline;">+</span>2°C and relative humidity 75<span style="text-decoration: underline;">+</span>5% R.H. in laboratory. The study indicated that the different biological aspects of <em>P. pseudominutus</em> was significantly affected by feeding on the different used diets at different temperatures. The males of mite individuals lasted lowest times in their development in comparison with those taken for females. The lower temperature 20ºC significantly increased the life periods of individuals in comparison with 35ºC. The lowest period of life cycle (9.17 days) was recorded when the male mites fed on <em>F</em>. <em>oxysporum</em> at 35ºC, while the longest period (25.77 days) was noticed when the female individuals reared on the same previously mentioned before diet at 20ºC. However, longevity period of the cunaxid mite was recorded the highest period when the females fed on <em>P. spinosum</em> at 20ºC (59.75 days) while the lowest longevity period recorded when the males fed on free living nematode but at 35ºC (26.09 days). On the other hand, the fungi<em> P.spinosum</em> increased the life span time for predatory mite females at 20ºC where the time taken was 59.75 days, but the lowest time was recorded when the male individuals fed on the free living nematode at 35ºC (26.09 days). From the obtained results also, it was noticed that the best diet for rearing the cunaxid mite, <em>P. pseudominutus</em> was free living nematode at 25ºC where it recorded the highest number of deposited eggs (73.2) but the least favourable one for feeding was the same food but at 35ºC (47.61.71 eggs).
Cunaxid mite,Pulaeus pseudominutus,Development,diet,Temperature
https://eajbsa.journals.ekb.eg/article_12854.html
https://eajbsa.journals.ekb.eg/article_12854_dc467f71cf935166d8283685ccbe98d2.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Effect of Virgin Queens Storage on Their Survival Rate, Attractiveness and Acceptance by the Honey Bee Colonies
63
69
EN
Mohammad
A.
Al-Fattah
Department of Economic Entomology and Pesticides, Fac. of Agric., Cairo Univ., Giza, Egypt.
Yasser
Y.
Ibrahim
Department of Economic Entomology and Pesticides, Fac. of Agric., Cairo Univ., Giza, Egypt.
Hatem
A.
Sharaf El-Din
Department of Economic Entomology and Pesticides, Fac. of Agric., Cairo Univ., Giza, Egypt.
10.21608/eajbsa.2016.12856
Virgin honeybee queens, were held in the centre of brood nest of both queenless and queenright strong colonies using two types of cages and fed by workers through a wire screen holes, emerging cage (EC) with two wire screen sides and Benton cage (BC) with one side of wire screen. Mean survival rate of stored queens in both cage types were not differ significantly. Storage virgin queens within queen-right colony was influenced reversely by the presence of colony laying queen as the survival rate was significantly lower (68.0%) than queens stored in queenless colonies (77.4%). The attractiveness of introduced virgin queens 30 days old to workers increased when the duration of queenlessness increase from 1 to 7 days and also, the acceptance percentage of them. The number of workers attracted by virgin queens was increased with the storage periods (3, 15 and 30days) as the lowest significant number was for the 3 days period, while there were no significant differences between the rest of periods. The younger and older queens were most significantly accepted than the intermediate ones. Workers in the 5 days queenless nuclei were more attracted and easily accepted the introduced virgin queens than those in similar queenless strong colonies.
honeybee queens,survival rate,attractiveness & acceptance,percentage
https://eajbsa.journals.ekb.eg/article_12856.html
https://eajbsa.journals.ekb.eg/article_12856_5ef53f7478987388a86c54db658e7e5f.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
The Spatial Distribution of Honeybee Apis mellifera L. Drones in Their Colony
71
79
EN
Mohammad
A.
Abd Al-Fattah
Department of Economic Entomology and pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt.
Ahmed
A.
El-Shemy
Department of Economic Entomology and pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt.
Mohamed
S.
El-Masarawy
Department of Economic Entomology and pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt.
10.21608/eajbsa.2016.12857
This work was carried out in the apiary of Agric. Fac. Cairo Univ., Giza, Egypt during spring and summer seasons of 2015 to study the spatial distribution of young and old honeybee drones <em>Apis mellifera</em> L.. The obtained results showed that the spatial distribution of drones was differed according to their ages and seasons of the year. Generally the immature adult drones tend to concentrate on the brood combs, whereas the mature ones were showed on peripheral combs. On the other hand during the cold months the majority of young drones were showed on the central combs, whereas the stable temperature which was suitable for their sexual maturity.
Honeybee,Apis mellifera L,Mature & immature drones
https://eajbsa.journals.ekb.eg/article_12857.html
https://eajbsa.journals.ekb.eg/article_12857_28d04ac53156e581852907ee808b5f11.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Temperature and Leaf Status Effect Range on The Rates of Aphis craccivora Koch in bean
81
87
EN
Abd El-Wareth
H.
M.
Plant Protection Research Institute, ARC, Dokki, Giza, 12618 Egypt.
10.21608/eajbsa.2016.12858
Five degree of temperatures was tested from 10 to 30˚C, <em>Aphis craccivora,</em> was reared on two statuses of bean leaves young and old (Nbrasca variety). Aphid insects were developed faster and had a higher mean relative growth rate and higher intrinsic rate of increase on young than on old leaves of bean, respectively. At temperature 25°C, it was more performance for aphid's development and rearing comparing by other degrees. The intrinsic rate of increase is strongly correlated with the mean relative growth rate during development for<em> Aphis craccivora</em> reared on both young and old leaves of bean plants from 10 to 25°C.
temperatures,Aphis craccivora,Bean
https://eajbsa.journals.ekb.eg/article_12858.html
https://eajbsa.journals.ekb.eg/article_12858_0fde9812566f70df984aedc1c1a4e59f.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Ecological Studies on Cottony Camellia Scale, Pulvinaria floccifera (Westwood) (Hemiptera: Coccidae) on Sago Palm Cycas revoluta Thunb in Relation to Biotic and Abiotic Factors.
89
100
EN
Ghada
S.
Mohamed
Plant Protection Department, Faculty of Agriculture, South Valley University, Qena, Egypt.
10.21608/eajbsa.2016.12859
The Sago palm infested with different scale insects, among them the cottony camellia scale, <em>Pulvinaria floccifera</em> (Westwood), is the most serious pest of Sago palm. This study was conducted to demonstrate the number of generations of this pest and the effect of parasitic and meteorological factor on its population. The present study was carried out in the Farm of Faculty of Agriculture, Assiut university, during two successive seasons of 2013/2014 and 2014/2015. The obtain results of both seasons showed that half monthly observation of this insect had one peak of seasonal activity per year, which was recorded in the 1<sup>st </sup> of March. The highest percentage of the total monthly mean count was also recorded during March. (20.69, 19.09 % out of the total year count). The pest has one generation in each of the tow studied seasons. Concerning, the monthly variation rate in the population (M.V.R), the obtained results showed that the favorable times for this insect were from November to May of the first year and October to June of the second year. One parasitoid species was only found <em>Microterys flavus</em> (Howard). The percentages of parasitism ranged from 5.81% in October to 17.65% in August and 6.01% in April to 12.99% in July during the first and the second season of study
Ecological studies,cottony camellia scale,Pulvinaria floccifera,Microterys flavus
https://eajbsa.journals.ekb.eg/article_12859.html
https://eajbsa.journals.ekb.eg/article_12859_71ea3b878338b41dd9db948935fc311d.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Population Fluctuation of The Citrus Red Mite Panonychus citri (McGregor) on Some Citrus Species at Giza, Egypt
101
107
EN
Abdallah
A. A.
M.
Fruit Acarology Department, Plant Protection Research Institute (PPRI),
Agricultural Research Center (ARC), Egypt.
10.21608/eajbsa.2016.12860
The population fluctuation of <em>Panonychus citri </em>was studied during two successive years on three citrus species at Giza Governorate namely: Lemon (<em>Citrus limon</em> L.), Sweet orange; Navel orange (<em>Citrus sendonensis</em> L.). The obtained results recorded negative correlation between number of mites and average temperature and positive correlation between mite population and average relative humidity. Moreover, the citrus red mite, <em>P. citri</em> has one annual peak of year abundance in March on Lemon trees, while on naval orange and sweet orange, the annual peak occurred in April during two successive years.
citrus,lemon,Red mite,population,Giza
https://eajbsa.journals.ekb.eg/article_12860.html
https://eajbsa.journals.ekb.eg/article_12860_d4d29d3c028b8093b54cc48821967f11.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Effect of Queens Density, Cage Level and Position of Honeybee Mated Queens Stored for Different Periods in Queen-Right Bank Colonies on Their Supersedure Rate
109
119
EN
Mohammad
A.
Abd Al-Fattah
Department of Economic Entomology and Pesticides, Fac. of Agric., Cairo Univ., Giza, Egypt.
Yasser
Y.
Ibrahim
Department of Economic Entomology and Pesticides, Fac. of Agric., Cairo Univ., Giza, Egypt.
Hatem
A.
Sharaf El-Din
Department of Economic Entomology and Pesticides, Fac. of Agric., Cairo Univ., Giza, Egypt.
10.21608/eajbsa.2016.12861
This study was carried out in the apiary yard of Agricultural Experimental Station, Faculty of Agriculture, Cairo University, Giza Governorate, Egypt, during the active season of 2014, (from March to October). The work determined the effect of stored queens densities (20, 30 and 40 queen / colony), cage level (upper and lower levels) and it’s position (peripheral and middle positions) on the supersedure rate of queens stored in queen-right colony for 45 and 75 days. Storing mated queens in the mentioned densities had a significant effect on their replacement rate, as the lowest significant replacement rate was for storing 20 and 30 mated queens (20.0% and 30.0%, respectively), while density of 40 queens had the highest significant percentage (45.0%). Concerning the upper and lower levels of storing cages, the mean percentages of supersedure reached it’s highest rank when the cages contained queens stored in the lower level (35.0%) of the holding frame, while the upper level had a less significant mean of replacement recording 25.0%. Queens stored at the peripheral position had a higher significant supersedure rate (45.0%), while only 20.0% of the queens stored in the middle position have been replaced. Supersedure rate was influenced positively with increase of storage period, as queens stored for 75 days had the highest significant replacement rate (35.6%) comparing to the 45 days storage period (27.2%).The overall supersedure rate ranged from 30.0% to 32.5% throughout the experiments, which encourage and give another importance to of storing mated honeybee queens.
Honey bee,queen-right bank,supersedure,queen storage level,queen storage position
https://eajbsa.journals.ekb.eg/article_12861.html
https://eajbsa.journals.ekb.eg/article_12861_3191789a6e1c12eb414e99ae41aa0f79.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
01
Effect of Planting Dates and Certain Insecticides on the Lima Bean Pod Borer, Etiella zinckenella (Treit.) (Lepidoptera: Pyralidae) and Productivity of Cowpea Plants in Qalyoubia Governorate.
121
128
EN
Shaalan
H.
S.
Plant Protection Research Institute, (A.R.C), Giza, Egypt.
10.21608/eajbsa.2016.12862
Field experiments were carried out in Tahla village, Qalyoubia governorate during two successive seasons, 2014 and 2015. The first experiment was conducted to study the effect of four planting dates of cowpea seeds (March, 20<sup>th</sup>; April, 10<sup>th</sup>; May, 1<sup>st</sup> and May, 22<sup>nd</sup>.) on infestation levels of cowpea pod borer, <em>Etiella zinckenella</em> (Treit.), and effect on yield of this crop. The degree of infestation by <em>E. zinckenella</em> significantly increased by delaying planting date. Cowpea plants cultivated in the earliest planting date (March, 20<sup>th</sup> ) was attacked by few numbers (2.3 & 1.5 larvae/10 pods during the two successive seasons, respectively), with the high weight of cowpea seeds (27.7 & 28.9 kg/ 100 m<sup>2</sup> during the two seasons, respectively). However, it was given the lowest number of both damaged pods and seeds. In contract the plants of the latest planting date (May, 22<sup>nd</sup> ) was more liable to insect infestation (9.0 & 15.3 larvae/10 pods during both two seasons, respectively), with the low weight of cowpea seeds (20.2 & 19.3 kg/ 100 m<sup>2</sup> during 2014 and 2015, respectively), Also, it was given the highest number of damaged pods and seeds. Therefore, it was concluded that the plant date was effective on infestation rate by this pest and yield of cowpea seeds and can be avoided by planting it as early as March, 20<sup>th</sup> .
The second experiment was studied the effect of some insecticides and their efficacy against lima bean pod borer, <em>E. zinckenella</em> of cowpea. The present results showed that the mortality percentage were arranged descending as Sumithion 50% EC (62 %), Tracer 24% SC (55.3%), Radiant 12% SC (53.4%), Neemix 4.5% EC (35.7%) and finally Dipel 2x 6.4% WP (33.7%), with significant differences between the tested treatments compared with control. Also, Sumithion was the superior compound in this respect being registered 53.8 % increasing in the yield over the control value followed by Tracer (43.2 %), Radiant (40.8 %), Neemix (19.7 %) and Dipel 2x (12.7%).
Insecticides,Etiella zinckenella (Treit.),Tahla village,Qalyoubia
https://eajbsa.journals.ekb.eg/article_12862.html
https://eajbsa.journals.ekb.eg/article_12862_f7c3bb7c48631eb9c6ef1418b05fe157.pdf
Egyptian Society of Biological Sciences
Egyptian Academic Journal of Biological Sciences. A, Entomology
1687-8809
2090-0813
9
1
2016
03
03
Toxicological Effects of Hematite Nanoparticles on the Common House Mosquito, Culex pipiens L. (Diptera: Culicidae)
57
62
EN
Reda
F. A.
Bakr
Department of Entomology, Faculty of Science, Ain Shams University
redabakr55@gmail.com
Noha
A.
Guneidy
Department of Entomology, Faculty of Science, Ain Shams University
Mohammed
S.
Attia
Department of Chemistry, Faculty of Science, Ain Shams University
Ibrahim.
R.
Elsebaey
Department of Entomology, Faculty of Science, Ain Shams University
10.21608/eajbsa.2016.314757
<span style="font-size: 11.0pt;">The obtained work aimed to evaluate the efficiency of hematite nanoparticles as larvicidal agents against <em>Cx. pipiens</em> larvae. Hematite nanoparticles were synthesized by a simple hypothermal method. The obtained nanoparticles average size was below 50 nm. TEM images determined the size and morphology of nanoparticles. Serial concentrations were applied on mosquito larvae. It was found that LC<sub>50</sub> of hematite nanoparticles after 48 hours of treatment was 5.6997 ppm. The obtained results added a new weapon to control mosquitoes. It is suggested to investigate the joint action of nanoparticles with other insecticides to which insects had developed resistance.</span>
Culex pipiens,Hematite,Nanoparticles
https://eajbsa.journals.ekb.eg/article_314757.html
https://eajbsa.journals.ekb.eg/article_314757_7ce966a5af6509de31ad9e4cabd6b77c.pdf