Effects of pigment glands and gossypol on growth, development and insecticide-resistance of cotton bollworm (Heliothis armigera (Hübner))

2010 ◽  
Vol 29 (8) ◽  
pp. 813-819 ◽  
Author(s):  
Guangchao Kong ◽  
Muhammad. K. Daud ◽  
Shuijin Zhu
Keyword(s):  
Insecticide Resistance ◽  
Heliothis Armigera ◽  
Cotton Bollworm ◽  
Growth Development ◽  
Pigment Glands

Investigations on the Cotton Bollworm, Heliothis armigera, Hübn

1940 ◽  
Vol 31 (2) ◽  
pp. 147-177 ◽  
Author(s):  
F. S. Parsons
Keyword(s):  
Heliothis Armigera ◽  
Egg Laying ◽  
Food Plant ◽  
Cotton Bollworm ◽  
Flowering Period ◽  
Flower Production ◽  
Plant Associations ◽  
The Given

Studies of the food-plant associations of Heliothis armigera have elicited the information that, for all practical purposes, egg-laying may be considered as confined to the period of florescence. Evidence of coincidence of the oviposition and flowering curves is submitted for 21 species of short-flowering crops and 8 species of long-flowering crops. All told, records taken in nearly 1,000 crops have been consulted for the conclusions drawn.As regards short-flowering species, the peaks, as well as the confines, of the oviposition and flowering curves are related closely. But oviposition on long-flowering species may decline while flowering is still in progress, or two or more waves of oviposition may be evident according to the number of moth flights spanned by the flowering period. The courses of oviposition on long-flowering species of crop in the given instances are interpreted through knowledge of the train of moth flights: although egg-laying in quantity occurs within the flowering period, peak layings frequently are not aligned with maximum flower production because the calendar times of moth flights are displaced in relation thereto.

Identification of the sex pheromone of the cotton bollworm,Heliothis armigera, in Israel

1980 ◽  
Vol 8 (3) ◽  
pp. 209-211 ◽  
Author(s):  
E. Dunkelblum ◽  
S. Gothilf ◽  
M. Kehat
Keyword(s):  
Sex Pheromone ◽  
Heliothis Armigera ◽  
Cotton Bollworm

Investigations on the Cotton Bollworm, Heliothis armigera, Hübn. (obsoleta, Fabr.)

1939 ◽  
Vol 30 (3) ◽  
pp. 321-338 ◽  
Author(s):  
F. S. Parsons
Keyword(s):  
Heliothis Armigera ◽  
Climatic Conditions ◽  
Continuous Operation ◽  
Food Plant ◽  
Cotton Bollworm ◽  
Natural Food ◽  
Food Crops ◽  
Quantitative Survey ◽  
Cotton Pest

Methods for the quantitative survey of the incidence of Heliothis armigera have been in continuous operation in the Barberton area of the Eastern Transvaal from 1929 to the present; since 1933 the Survey was operated similarly in Swaziland and Northern Natal.It was accepted early that the bollworm situation in cotton, which primarily it was desired to ameliorate, depends largely upon the influences exerted by other food-crops of the insect grown prior to and in association with cotton, and the investigations were instituted with a view to acquiring the fullest information on the incidence, habits and reactions of H. armigera with respect to the chain of cultivated and natural food-plant situations existing under differing climatic conditions in the course of the year.The present paper is the first of a series communicating the results of investigations which proceed in various directions from information supplied by the Cotton Pest Survey centred upon Barberton. The paper deals with the annual course of bollworm incidence as indicated, in the first instance, by egg counts taken twice-weekly, year by year, in examples of all food-plant situations according to methods of sampling and calculation devised here.

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