Abstract
Reaction of pulse beetle, #Callosobruchuschinensis L. to 20 genotypes of pulses belonging to lentil (#Lens culinaris Medik.), mungbean
(Vigna radiata (L) R. Wilczek), chickpea (#Cicer arietinum L.) and blackgram (#Vigna mungo (L.) Hepper) was evaluated in no choice test in the
laboratory of the Department of Entomology, Bangladesh Agricultural
University, #Mymensingh for observing the number of eggs deposition
on seeds and percentage of damage of seed. Highest (73.1) number of eggs
was laid on chickpea, while the lowest (19.5) was in blackgram.
The results revealed that all the genotypes of chickpea were found to
have highly susceptible to pulse beetle and blackgram #genotypes were
least susceptible. The susceptibility of lentil and mungbean were
observed intermediate. Maximum (24.4%) of seed damage was observed on
chickpea and the minimum (6-9%) was recorded in blackgram. Except
blackgram, all the tested genotypes of chickpea, lentil and mungbean
differed significantly for their susceptibility to the pulse beetle. The
genotypes ML-22 of lentil, MC-21 of mungbean, Hyprosola of chickpea
and MAK–1-79 of blackgram were marked least susceptible in comparison
with the tested genotypes of respective pulse species. Seed surface
smoothness, seed coat thickness and chemical stimuli influenced on the
oviposition and damage of pulses by the pulse beetle.
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