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2 results

Influence of Temperature on Knock-down and Mortality to Fenitrothion in the Three Lepidopteran Species of Insects
V. B. Yadwad, V. L. Kallapur
Journal:

Insect Science and Its Application / Volume 9 / Issue 4 / August 1988

Published online by Cambridge University Press:

19 September 2011, pp. 531-534

Print publication:

August 1988
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Both sublethal and lethal doses of fenitrothion treatment caused positive temperature toxicity relationship in three lepidopteran fifth instar larvae, Achaea Janata, Mythimna separata and Bombyx mori.
The LD50 value was very low at 30°C compared to 28 and 18°C. In all the three species, the insecticide caused greater rate of regurgitation of body fluid at higher temperature. It is believed that the loss of body fluid causes desiccation and enhances the poisoning effects of fenitrothion.

The role of migration in the life system of the African armyworm Spodoptera exempta
D. J. W. Rose, C. F. Dewhurst, W. W. Page, L. D. C. Fishpool
Journal:

Insect Science and Its Application / Volume 8 / Issue 4-5-6 / December 1987

Published online by Cambridge University Press:

19 September 2011, pp. 561-569

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December 1987
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The African armyworm is a migrant moth which, in its larval form, can cause severe plagues which destroy cereal crops, sugarcane and pastures in many parts of Africa. This paper reviews the relevant aspects of a multidisciplinary study into the dispersal behaviour and re-concentration of moths, migratory flight, source areas, population upsurges and the seasonal movement of moths. It introduces the new concepts of primary and critical outbreaks.

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2 results

Influence of Temperature on Knock-down and Mortality to Fenitrothion in the Three Lepidopteran Species of Insects

The role of migration in the life system of the African armyworm Spodoptera exempta