Relative susceptibility of faba bean varieties to Callosobruchus maculatus (F.)

Document Type : Original Article

Authors

1 Dept. of Stored Product Pests Institute of Plant Protection Agric. Res. Center, Giza, Egypt.

2 Dept. of Seed Technology, Field Crops Research Institute Agric. Res. Center, Giza, Egypt.

10.21608/jpces.2006.460741

Abstract

Seven faba bean varieties were assessed to study their susceptibility to the bruchid Callosobruchus maculatus infestation. The association between some physical and chemical characteristics and the susceptibility were investigated, under laboratory conditions. The physical characteristics were seed weight, seed volume and relative density. Furthermore, the chemical parameters of moisture, protein, fat, ash, crude fibers, total carbohydrates and tannic acid were studied. The results, evaluated on the basis of oviposition, % hatchability, % progeny and % damage. In fact, the faba bean varieties differ greatly to the attack of C. maculates. In no-choice conditions, the English variety had the least susceptibility level (10 % damage value) followed by Sakha 1 (25.84 % damage) and Giza 717 (29.11% damage). Giza 643 and Giza 461 were significantly more susceptible to infestation levels and showed 67.71 and 62.89 % damage, respectively. In free-choice condition, also the English variety was the highest tolerant with 38.37 % damage value, while the triple white variety was the least resistant one (100 % damage). Results indicated that tannic acid content significantly reduce the damage of certain varieties in the present work.

Keywords

Journal of Pest Control and Environmental Sciences
Volume 14, Issue 2
December 2006
Pages 167-178

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