Dual Cry2Ab and Vip3A Resistant Strains of Helicoverpa armigera and Helicoverpa punctigera (Lepidoptera: Noctuidae); Testing Linkage Between Loci and Monitoring of Allele Frequencies

2014 ◽  
Vol 107 (4) ◽  
pp. 1610-1617 ◽  
Author(s):  
T. K. Walsh ◽  
S. J. Downes ◽  
J. Gascoyne ◽  
W. James ◽  
T. Parker ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Allele Frequencies ◽  
Helicoverpa Armígera ◽  
Resistant Strains ◽  
Lepidoptera Noctuidae

scholarly journals Cross-Resistance Studies of Cry1Ac-Resistant Strains of Helicoverpa armigera (Lepidoptera: Noctuidae) to Cry2Ab

2007 ◽  
Vol 100 (3) ◽  
pp. 909-915 ◽  
Author(s):  
Shudong Luo ◽  
Kongming Wu ◽  
Yan Tian ◽  
Gemei Liang ◽  
Xue Feng ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Cross Resistance ◽  
Helicoverpa Armígera ◽  
Resistant Strains ◽  
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.

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