Neem,The Source of Natural Insecticides
Mesfin Wondafrash
Broschiertes Buch

Neem,The Source of Natural Insecticides

Neem Extracts Adversely Influenced Biology of African Bollworm, Helicoverpa armigera (Hubner) (Lepidoptera:Noctuidae)

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African bollworm, Helicoverpa armigera is a polyphagus insect pest of many crops leading to significant yield losses. Cotton which is the most important oil seed and fiber crop grown in more than 70 countries is seriously threatened by this pest. African bollworm is a priority pest limiting the production and productivity of cotton in Ethiopia. For decades, its control both in small and large scale cotton farms is solely dependent on the use of synthetic insecticides such as chlorinated hydrocarbons, organophosphates, carbamates and synthetic pyrethroids which are known for their hazardous eff...