The Overseasoning Habit of the African Bolloworm, Heliothis armigera (Hubner), on chickpea at Debre Zeit.
1985
tibebu Habtewold and Tessema Megenasa(Entomologist and Director)
Field cage experiments using chickpea (Cicer arietinum L.) planted on three soil types (black, light and inter-mediate) were conducted from Aug., .1981 to March, 1982 to investigate the nature of diapause of the African bolluorm (Heliothis armigera) under conditions of Debre Zeit. Cages containing different soil sypes were arranged in a completely randomized design with three replications. A large proportion of the insects underwent prolonged pupal period exceeding 50 days suggesting pupal diapause during the cool temperature months of November to March. The highest peak of moth emergence took place in the second week of December. Type of soil appeared to have more impact on pupal duration than on depth of pupation. The treatment consisting of light soil resulted in the longest pupal duration (102.3 days) which was significantly different from the heavy soil (57 days).
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