TY - JOUR T1 - Deterrent, Antifeedant and Lethal Effects of Methanolic Extract of Neem Seed Kernel on Cotton Boll Worm, Helicoverpa armigera (Hubner),in Comparison with Two Commercial Products (Neem Azal and Neem Plus) TT - اثرات بازدارندگی رشد، ضد‌تغذیه‌ای و کشندگی عصاره متانولی مغز دانه چریش روی کرم قوزه پنبه(Helicoverpa armigera (Hubnerدر مقایسه با دو ترکیب تجاری نیم‌آزال و نیم‌پلاس JF - JCPP JO - JCPP VL - 13 IS - 47 UR - http://jcpp.iut.ac.ir/article-1-1052-en.html Y1 - 2009 SP - 243 EP - 253 KW - Neem seed kernel KW - Methanol extract KW - Neem Azal KW - Neem Plus KW - Cotton bollworm. N2 - Various effects of methanolic extract of neem seed kernel on larvae of cotton boll worm, Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) were studied and compared with those of Neem Azal T/S and Neem Plus, two commercial formulations. The pest was collected from Gorgan (Golestan Province, Iran) and reared on a bean based artificial diet. The neem seed was collected from Bandar-Abbas (Hormozgan Province) and extracted in laboratory. Growth inhibitory and antifeedant assays were carried out on larvae treated with seed kernel extracts in 3 concentrations,1, 2.5 and 5%, under choice and no-choice conditions. The neem extract had a significant antifeedancy effects on larvae. Neem Plus and 5% extract had the least and most antifeedancy effects, respectively. The most and least feeding rates belonged to Neem Plus and Neem Azal treatments, respectively, which differed significantly (P M3 ER -