Incremental cost-benefit ratio of certain bio-pesticides against Helicoverpa armigera Hubner (Noctuidae: Lepidoptera) in chickpea
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Ovicidal activity of Atalantia monophylla (L) Correa against Helicoverpa armigera Hubner (Lepidoptera: Noctuidae)
Hexane, chloroform and ethyl acetate crude extracts of Atalantia monophylla leaf were studied for ovicidal activity against Helicoverpa armigera at 0.5. 1.0, 2.5 and 5.0% concentrations. The ovicidal activity of 67.10% was statistically significant noticed in hexane extract at 5.0% concentration. The least LC50 value of 2.60% was observed in hexane extract with significant Chi-square value at P...
متن کاملبررسی شاخص‌های تغذیه‌ای کرم میوه گوجه‌فرنگی Helicoverpa armigera (Hubner, 1808) (Lepidoptera: Noctuidae) روی ده رقم گوجه‌فرنگی
عملکرد تغذیه‌ای لارو (Helicoverpa armigera ( Hübner (مراحل لاروی چهارم، پنجم و ششم) با تغذیه از میوه سبز نارس ارقـام مختلـف گوجه فرنگی ( ارس، اترک، کورال، ریوگراند، موبیل، سیوند، سوپر موبیل، سوپر چف، سوپر کویین و سوپر اوربانا) تحت شرایط آزمایشگاهی دمای ۱±۲6 درجه سلسیوس، رطوبت نسبی 10±60 درصد و دوره نوری ۱۶ ساعت روشنایی و ۸ ساعت تاریکی بررسی شـد. بیـش‌ترین و کم‌تـرین مقادیر هضم شوندگی غذا (AD) ...
متن کاملEfficacy of Some Synthetic and Biopesticides Against Pod Borer, Helicoverpa armigera (Hubner) in Chickpea
Efficacy of some synthetic and biopesticides against pod borer, Helicoverpa armigera (Hubner) damage in chickpea was studied at the Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh during rabi cropping season of 2004-05. Synthetic and biopesticides reduced pod borer damage significantly. Significantly lowest pod damage was observed in cypermethrin (5.75%) and HNPV (5.86%) spra...
متن کاملThe Spread of Helicoverpa armigera (Lepidoptera: Noctuidae) and Coexistence with Helicoverpa zea in Southeastern Brazil
Helicoverpa armigera, one of the world's most destructive crop pests, was first documented in Brazil in 2013. Within a few months, this polyphagous insect had spread over the Northeast and Central-West of Brazil, causing great agricultural losses. With several reports of populations resistant to pesticides and Bt crops around the world, there is great concern about the spread of this pest in Br...
متن کاملSurvival and Feeding of African Bollworm, Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) Affected by Neem, Azadirachta indica (A. Juss) Extracts
The effects of neem oil (Nimbecidine 0.03% Aza) and water extracts of neem seed and leaf on African bollworm, Helicoverpa armigera were studied each at three concentration levels (2.5%, 5% and 10%) under laboratory condition. Square dip and larval immersion experiments were conducted using Completely Randomized Design in three replications. In square dip experiment, high mortalities were statis...
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ژورنال
عنوان ژورنال: LEGUME RESEARCH - AN INTERNATIONAL JOURNAL
سال: 2017
ISSN: 0976-0571,0250-5371
DOI: 10.18805/lr-3895