Effect of Some Soybean Varieties on Biological Aspects and Fecundity of The Two Spotted Spider Mite , Tetranychus urticae Koch ( Acari: Tetranychidae)

Author

Plant Protection Res. Inst.( A.R.C.) Dokki, Giza, Egypt

Abstract

 Biological and fecundity of the two spotted spider mite, Tetranychus urticae Koch reared on three soybean varieties: Giza 111, Giza 83 and Giza 22 were evaluated under laboratory conditions  of 25±1 oC and  65± 5% R. H.    The developmental times from egg to adult stage ranged from 14.15 to 11.4 days on Giza111 and Giza83 varieties, while, on Giza22 variety it lasted 10.10 days for female, while, the male life cycle stayed 12.3, 10.2 and 9.3 days, when, fed on the same soybean varieties. Female longevity was differed  among the tested soybean varieties  whereas, it lasted 10.90, 9.15 and 9.45 days when fed on, Giza111, Giza83, and Giza22 varieties of soybean , respectively. The tested soybean varieties greatly affected fecundity, female deposited of the reared mite , where the maximum number of laid eggs were registered on Giza22 variety      ( 45.50 egg), while, the least number of laid eggs of the  spider mite,  T. urticae was observed  on Giza111 variety( 34.50).

Files

Share

How to cite

Statistics