Field comparison between droplet distribution and the bioresidual activity of different insecticides against Spodoptera littoralis (boisd) by using certain ground spraying equipment on cotton platns

Document Type : Original Article

Authors

1 -Department of Entomology, Faculty of Science, Ain Shams University -Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia

2 Plant Protection Res. Instit. , Agric. Res. Center, Spray Technology Res. Department, Dokki, Giza.

3 Department of Entomology, Faculty of Science, Ain Shams University

4 Central Agricultural Pesticides Laboratory, Agric. Res. Center, Pesticide Residues and Environmental Pollution Research Department.

5 Plant Protection Res. Instit. , Agric. Res. Center, Spray Technology Res. Department, Dokki, Giza

Abstract

Field experiments are carried out in an area of about 1.9 feddan planted with cotton plants Giza (89) during season 2005 in 28th June at Kafr Bani Ghrian, Monofia governorate. The selected area was split into 18 plots and control plots. Three products were sprayed with Profenofos, Spinosad and Pyriproxyfen of recommended rate and ¾ recommended rate and one treatment left without spraying as control by using conventional motor sprayer (600 L./Fed.), Motorized Knapsack sprayer (Agromondo) (20L/Fed.) and hand held compression sprayer (Kwazar) (94L/Fed.) for each product the average number of egg-masses of cotton leaf worm/m² was 3. Data indicated that, all tested compounds induce negative influenced on larval survival. The most effective compounds are Profenofos and Pyripoxyfen followed by Spinosad. It could be recommended to use Profenofos and Pyriproxyfen followed by Spinosad with LV spraying equipment with not less than (20L/Fed.) and use ¾ recommended dose which revealed successful results in mortality.

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