PNABD246.pdf

iiAhibited when coconut and mustard oils were used, and very few eggs were found
in mungbean seeds treated with groundnut, sesame and sunflower oils. The
development of adult population of the pulse beetle was prevented at least for
5 months, and the germination or viability of the treated seeds was not
affected. Coconut oil was the best protectant, followed by mustard, groundnut
and sesame oils. [AS]
*0782 Janardan, K.G. 1980. A stochastic model for the study of oviposition
evolution of the pest Callosobruchus maculatus on mung beans, Phaseolus aureus.
MATHEMATICAL BIOSCIENCES, v.50(3/4):231-238. jEnj [En Abst] (REP.MB-2739)
Mitchell (1975) experimentally investigated the oviposition behavior of
bruchid beetles on mungbean. A stochastic model was developed to study the
oviposition tactics of the bean weevils on beans. This model identifies an
avoidance probability that is invariant among weevils, and explains the nuances
in egg laying behavior of different weevils by varying the rate parameter
[lambda] alone. [AS]
*0783 Singh, Y. ; Saxena, H.P. ; Singh, K.M. 1980. Exploration of
resistance to pulse beetles. 4. Influence of black gram flour on the growth and
development of Callosobruchus chinensis Linnaeus. INDIAN JOURNAL OF
ENTOMOLOGY, v.42(4):b90-695. [En] [En Abst] (REP.MB-2282)
Callosobruchus chinensis Linn. was reared for the first time on the flour
of pulse filled in the gelatin capsules. it was observed that increasing the
levels of blackgram flour in t2,e flcur mixture of mungbean considerably
prolonged the developmental period. The combined larval and pupal development
took 38.5 days in the flour mixture of mungbean and blackgram (1:0.6), as
against 19.36 days in the mungbean flour alone. With further increase in the
level of blackgram flour, not a single larva could complete its development.
Other life processes, viz., adult emergence, fecundity and weight of both the
larva and adult beetle were impaired with the increase in the levels of
blackgram content in the food mixtures. There was significant difference in the
response due to mixing of blackgram flour upto the ratio of 1:0.05 which is
apparent from the variations in the growth indices. A positive correlation
existed between increasing proportions of mungbean flour and the growth index
of C. chinensis, whereas, a negative correlation was established between the
developmental period and the growth index of this pulse beetle in different
leveis of blackgram flour in the food mixture. Thus, it has been clearly
demonstrated that blackgram is completely unsuitable for C. chinensis and there
is some chemical factor which is responsible for the inhibition of growth and
development of the pest. [AS]
*0784 Singh, Y. ; Saxena, H.P. ; Singh, K.M. 1980. Exploration of
resistance to pulse beetles. 6. Resistance factors. INDIAN JOURNAL OF
ENTOMOLOGY, v.42(4):701-712. [En] [En AboL] (REP.MB-2283)
Among the various extracts of blackgram, only 0.05 N HCl extract inhibited
the growth and development of Callosobruchus chinensis Linn. On the other hand,
extracts of blackgram, viz., water, 50% alcohol, absolute alcohol, acetone and
also 0.05 N HCI failed to cause any adverse effect on the growth and
development of Callosobruchus maculatus Fab. Lentil extracts also did not cause
any inhibitory effect on the growth and development of both C. chinensis and C.
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