TY  - SER
AU  - Hatem,A.E.
AU  - Abdel-Samad,Salwa S.M.
AU  - Abul Fadl,H.A.A.
TI  - Lethal effects of spinosad and azadirachtin on the cotton leafworm, spodoptera littoralis (BOISD.) (lepidoptera: noctuioae)
KW  - Cotton leafworm
KW  - Cotton
KW  - Diseases and pests
KW  - Spodoptera littoralis
KW  - Fecundity
N1  - Includes reference
N2  - Laboratory experiments have been conducted to determine the lethal effects of Spinosad and Azadirachtin on the cotton leafworm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) larvae by a diet incorporation bioassay. Newly molted third instar larvae were exposed through ingestion to different concentrations. Larval mortality of S. littoralis increased with the concentration resulting a LC₅₀ values of 1.38 µg/ml and 0.14 µg/ml for, Spinosad and Azadirachtin respectively, the mortality times decreased with the concentration Increase. Sublethal effects were studied by treating of third instar larvae with a concentration equivalent to the respective LC₅₀. Both insecticides significantly increased larval development period from treatment until pupation, but the effect of Azadirachtin was greater than pinosad
UR  - http://nile.enal.sci.eg/EALE/2009/AAS/5308/1/273.pdf
ER  -