SEASONAL ACTIVITY OF HELICOVERPA ARMIGERA (LEPIDOPTERA: NOCTUIDAE) FOR IMPROVED CONTROL MANAGEMENT STRATEGIES IN PROCESSING TOMATOES

2007 ◽  
pp. 89-94 ◽  
Author(s):  
S. Boukhris-Bouhachem ◽  
C. Hdider ◽  
R. Souissi ◽  
I. Ghazel ◽  
J. Pizzol
Keyword(s):  
Helicoverpa Armigera ◽  
Management Strategies ◽  
Seasonal Activity ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae ◽  
Control Management ◽  
Processing Tomatoes

Genetic shifts in Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) over a year in the Dawson/Callide Valleys

2003 ◽  
Vol 54 (8) ◽  
pp. 739 ◽  
Author(s):  
K. D. Scott ◽  
K. S. Wilkinson ◽  
M. A. Merritt ◽  
L. J. Scott ◽  
C. L. Lange ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Helicoverpa Armigera ◽  
Management Practices ◽  
Management Strategies ◽  
Local Management ◽  
Genetic Changes ◽  
Helicoverpa Armígera ◽  
Low Levels ◽  
Current Area ◽  
Lepidoptera Noctuidae

Microsatellites were used to analyse 68 collections of Helicoverpa armigera in the Dawson/Callide Valleys in central Queensland. The study aimed to evaluate the genetic structure in this region over a 12-month period (September 2000–August 2001). The results detected genetic shifts in H. armigera collections, with genetic changes occurring month by month. Collections in any month were genetically distant from the preceding month's collections. There was no observed difference between collections of H. armigera from the Biloela region and those found in the Theodore region of central Queensland. The data support the current area-wide management strategies for H. armigera by reinforcing the importance and contribution of local management practices. The study also indicates a need for the continuation of regional or Australia-wide approaches to management of the low levels of immigration that are occurring, and for future high pest pressure years.

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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