PNABD246.pdf

ut the difference in the average number of holes was not significant. [THHJ
*0735 Pal, S.K. 1972. A note on leaf weevil Cyrtozenia cognata Marshall
(Curculionidae: Coleoptera) infesting Kharif crops in dryland farming. ANNALS
OF ARID ZONE, v.11(1/2):132. [EnJ (REP.MB-2569)
The adult mungbean weevil is grey. It is 7 mm long and 4 mm wide. It
nibbles the leaves and makes round and irregular holes, resulting in poor plant
growth. The average population of weevils recorded on each plant was 2-6 and
weevils were found hiding in the clods and around debris. The activity of the
pest was maximum during morning and evening hours. Results obtained from the
application of some insecticides revealed that 0.03% Phosphamidon (two sprays
.t10-day interval) was quite effective in controlling the pest. [AS/THH]
*0736 Enyi, B.A.C. 1975. Effects of defoliation on growth and yield in
groundnut (Arachis hypogea), covpeau (Vigna unguiculata), soyabean (Glycine
max) and green graw (Vigna aurens). ANNALS OF APPLIED BIOLOGY, v.79(1):55-66.
[En] [En Abst] (REP.MB-0575)
Defoliation reduced the dry weight of stems, pods, grains and size of
individual grains in all four of the legume crops studied and the dry weight of
flowering inflorescence stalk in the case of cowpeas and mungbean only. The
adverse effect of defoliation was more pronounced when defoliation was complete
than when half of the number of leaves were removed. The greatest reduction in
grain yield occurred when the plants were defoliated during the early podding
stage, the percentage reduction being 59.7, 79.0, 86.4 and 95.3 in groundnut,
cowpeas, soybeans and mungbean, respectivaly, when completely defoliated at
this stage and 43.3, 14.0, 42.4 and 46.1, respectively, when only half
defoliated. The results show that assimilates produced by the leaves during the
early stages of growth are used in the growth of stems and leaves, but the
assimilates produced during the reproductive stage are used mainly for the
growth of the pods. In groundnut, pod number and grain weight were positively
'correlatedwith stem weight. It appears that defoliation reduced pod number by
depressing the growth of stems and this in turn reduced the number of flowering
nodes. The reasons for the differences between the crops in their response to
the defoliation treatments and the practical implications of the findings in
relation to pest and disease control and plucking of leaves for human
consumption are discussed. [ASI
*0737 Sinha, M.M. ; Yadav, R.P. ; Singh, R. 1975. Laboratory studies on the
effects of some varieties of mung (Phaseolus aureus Roxb.) on the growth and
development of Bihar hairy caterpillar (Diacrisia obliqua Walker). LABDEV
JOURNAL OF SCIENCE AND TECHNOLOGY, PART B: LIFE SCIENCE, v.13(3/4):375-178.
[En] [En Abst] (PEP.MB-2679)
In laboratory studies on nine different varieties of mungbean (Vigna
radiata) for their relative suitability to support the growth and development
of Diacrisia obliqua Walker during kharif, 1974 at the Agricultural Research
Institute, Dholi (Bihar), all the varieties of mungbean showed differential
behavior in respect of the growth and developmental pattern of this insect.
Among the varieties studied, ML 2 was found to be the most suited food whereas
No. 122 the least for the larval growth and development of the insect. In
respect of pupal period, all the varieties behaved more or less alike. With
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