Population studies on hadrophanurus species (scelionidae : humenoptera), egg parasite of bagrada cruciferarum kirk, on maize (zea mays) at Karnal

Narayanan, E. S. ; Subba Rao, B. R. ; Katiyar, R. N. (1959) Population studies on hadrophanurus species (scelionidae : humenoptera), egg parasite of bagrada cruciferarum kirk, on maize (zea mays) at Karnal Proceedings of the National Institute of Sciences of India, 25B (6). pp. 315-320. ISSN 0370-0860

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Abstract

the control of insect pests by means of their parasites, predators and other natural enemies is one the most economical and effective methods of control in applied entomology. The population studies of Hadrophanurus species, an egg parasite of Bagrada cruciferarum Kirk have, therefore, been studied. The rise and fall in the parasite population is directly proportional to the rise and fall in the population of the host. The maximum population of the parasite, i.e., 3881 adults per acre coincides with the maximum population of the host, i.e., 4939 eggs per acre. Similar interrelationship is also found when the population per acre of the host as well as that of the parasite are at their lowest level. There is no superparasitism in the species and its viability is as high as 100 per cent under field conditions. The percentage of parasitism was 85.1 percent during the season. This high percentage of parasitism exterminates the host and proves fatal to the parasite as well.

Item Type:Article
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ID Code:99188
Deposited On:17 Nov 2015 10:36
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