Resistance to Insecticides in a Thailand Strain of Heliothis armigera (Hübner) (Lepidoptera: Noctuidae)

1988 ◽  
Vol 81 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Mushtaq Ahmad ◽  
Alan R. McCaffery
Keyword(s):  
Heliothis Armigera ◽  
Lepidoptera Noctuidae

Incidence of Helicoverpa armigera (Lepidoptera: Noctuidae) and its natural enemies on smallholder crops in Kenya

1993 ◽  
Vol 83 (3) ◽  
pp. 321-328 ◽  
Author(s):  
H. van den Berg ◽  
M. J. W. Cock ◽  
G. I. Oduor ◽  
E. K. Onsongo
Keyword(s):  
Helicoverpa Armigera ◽  
Heliothis Armigera ◽  
Population Densities ◽  
Parasitoid Species ◽  
Larval Parasitoid ◽  
Total Percentage ◽  
Four Seasons ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae ◽  
Experimental Plots

AbstractSmallholder crops (sunflower, maize, sorghum and cotton) were grown in experimental plots at seven sites, representing different agricultural zones of Kenya, over four seasons. Helicoverpa armigera (Hübner) (formerly Heliothis armigera) only occasionally achieved population densities sufficient to cause obvious damage to the crops, and was virtually absent from the coastal sites. At the inland sites, infestation and mortality levels varied greatly. Information is presented on the incidence of H. armigera, and the identity, distribution and frequency of its common parasitoids and (potential) predators, sampled in the experimental plots. Trichogrammatoidea spp., egg parasitoids, and Linnaemya longirostris (Macquart), a tachinid late-larval parasitoid, were the most common parasitoid species, but total percentage parasitism was rather low. Of the large complex of predators, only anthocorids and ants (predominantly Pheidole spp., Myrmicaria spp. and Camponotus spp.) were sufficiently common and widespread to be of importance in suppressing H. armigera. The abundance of predators fluctuated widely between sites, but anthocorids were most abundant at the western sites.

scholarly journals The Biology and Ecology of Heliothis-Armigera (Hubner) and Heliothis-Punctigera Wallengren (Lepidoptera, Noctuidae) in Australia - What Do We Know

1986 ◽  
Vol 34 (6) ◽  
pp. 779 ◽  
Author(s):  
MP Zalucki ◽  
G Daglish ◽  
S Firempong ◽  
P Twine
Keyword(s):  
Host Plant ◽  
Population Biology ◽  
Host Plants ◽  
Control Strategies ◽  
Heliothis Armigera ◽  
Host Plant Selection ◽  
Mortality Factors ◽  
Insecticide Treatment ◽  
And Control ◽  
Lepidoptera Noctuidae

The taxonomy and identification of Heliothis armigera and H. punctigera, their distribution and host plants in Australia, the effect of host plant on reproduction and on the development and survival of immature stages, their movements, population biology and dynamics, and their control, are reviewed. Areas where further study is desirable include: the nature of host plant selection and host species preference; adaptability to new cultivars; effects of host plant on development; detailed life-table studies on different host plants; the contribution of predation, parasitism and disease to mortality; factors responsible for fluctuations in populations between years, including the origins of outbreak populations; and control strategies other than insecticide treatment.

Activity of adult Heliothis armigera (Hb.) (Lepidoptera, Noctuidae) with reference to the flowering of sorghum and maize in Botswana

1975 ◽  
Vol 65 (3) ◽  
pp. 523-530 ◽  
Author(s):  
R. E. Roome
Keyword(s):  
Light Trap ◽  
Heliothis Armigera ◽  
Crop Plants ◽  
Night Time ◽  
Crop Varieties ◽  
Dryland Crops ◽  
Lepidoptera Noctuidae

AbstractNight-time observations on adults of Heliothis armigera (Hb.), and data from light-trap and hand net catches in irrigated and dryland crops, showed that both sexes flew and fed and females oviposited between 20.00 and 23.00 h. From then until 02.00 h both sexes were inactive, but. from 02.00 to 04.00 h the males flew above the crop in a ‘purposeful’ manner, while the females were stationary and releasing pheromone. During this period of high male and low female activity, copulation in cages, assembly of males to females in cages and copulating pairs on crop plants were all observed. Inseminated female H. armigera were collected in crops which were at a stage suitable for oviposition, while traps away from crops or near mature crops collected mainly virgin females. It is suggested that susceptible crops attract H. armigera adults and that, once within the crop, inseminated females are ‘trapped’ by suitable physiological cues from the plants. Identification of such cues could assist in the breeding of crop varieties resistant to H. armigera attack.

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