The insect complex which attacks the reproductive structures of common bean (Phaseolus vulgaris L.): seasonal incidence, intensity of infestation and damage.
Experiments were conducted in 1983-84 at Palmira, Colombia, to determine the insects which attack the buds, flowers and pods of Phaseolus vulgaris and the damage they cause at different growth stages of the plant. Four planting dates and 3 cultivars were used. The insects found were: the noctuids Heliothis virescens and Pseudoplusia includens; the arctiid Estigmene acrea; the pyralid Maruca testulalis; the tortricids Epinotia aporema and Cydia fabivora; the lycaenid Strymon melinus; the chrysomelids Maecolaspis sp. [Colaspis sp.], Cerotoma salvinii, Colaspis sp., Disonycha sp. and Cryptocephalus sp.; and the pentatomids Euschistus crenator and Acrosternum marginatum. Of these, H. virescens, M. testulalis and the chrysomelids appeared with the greatest frequency. All of the insects occasionally damaged the pods in the pod-filling and pod-maturing plant growth stages; the chrysomelids and larvae of H. virescens also caused significant damage to the buds and flowers. The variety VRB-81023, which has a long vegetative stage, was more susceptible to the pests than the cultivars ICA-Pijao and Diacol-Calima.