EFFECT OF INFESTATION OF CULTIVARS OF BAMBARRA GROUNDNUTS (VIGNA-SUBTERRANEA (L) VERDE) BY CALLOSOBRUCHUS-SUBINNOTATUS (PIC) (COLEOPTERA, BRUCHIDAE) ON BIOCHEMICAL DETERIORATION AND GERMINATION OF THE SEEDS
Gn. Mbata, EFFECT OF INFESTATION OF CULTIVARS OF BAMBARRA GROUNDNUTS (VIGNA-SUBTERRANEA (L) VERDE) BY CALLOSOBRUCHUS-SUBINNOTATUS (PIC) (COLEOPTERA, BRUCHIDAE) ON BIOCHEMICAL DETERIORATION AND GERMINATION OF THE SEEDS, Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 101(4), 1994, pp. 350-356
An earlier work which involved the screening of the cultivars of bamba
rra groundnuts to Callosobruchus subinnotatus (Pic.) revealed that the
cultivars had different susceptibilities to the bruchid. Germination
was affected by the infestation of the seeds by the bruchids. The viab
ility of infested seeds decreased as the number of emergence holes inc
reased and as more time elapsed after infestation. There were differen
ces in the viability of infested seeds of the various cultivars up to
1 month after infestation. Two or 3 months following infestation, germ
ination was poor in all the cultivars. In the few seeds, which germina
ted among seeds having two or three emergence holes, emergence of the
radicle was earlier than in seeds having one or no emergence holes. Th
e infestation of the seeds caused increases in free fatty acids (FFA)
and peroxides which are indices used in the measuring of biochemical d
eterioration. The most susceptible cultivars recorded highest level of
FFA and peroxide increases.