PNABD246.pdf

population in mungbean. PRINCE OF SONGKLA UNIVERSITY, FACULTY OF NATURAL
RESOURCES, RESEARCH REPORT, 1985-1:23-24. jEn] (SB187.T4L3 1985)
Among many species of beanfly, Ophiomyia phaseoli (Tryon) is one of the
most important seedling infesting insects of mungbean. The objective of this
study was to examine the pattern of fluctuation of 0. phaseoli at Hat Yai,
Songkhla, Thailand. The number of maggots and pupae recorded on three varieties
of mungbean, viz., U-thong 1, VC 1560 D and CES ID-21, followed the same
pattern. For all varieties, the peak of the infestation period occurred around
late August and mid-September. However, the number of maggots and pupae in all
varieties decreased quite rapidly in late September. A significant difference
was found between the number of maggots and pupae recorded in all varieties in
the low and high rainfall periods. The infestation levels decreased remarkably
during rainy months. [PLH]
WHITEFLIES
*0702 Mathur, R.S. ; Banerjee, A.K. ; Bajpai, G.K. 1965. The effect of
vector control on yellow mosaic incidence on moong (mun, bean) in India.
PLANT DISEASE REPORTER, v.49(2):166-167. [En] [En Abst] (REP.MB-0514)
The incidence of the yellow mosaic of mungbean (Vigna radiata), a monsoon
pulse crop in Uttar Pradesh, was reduced by altering the dates of sowing or by
weekly spraying of insecticides for destroying the population of Bemisia tabaci
(Genn.) a vector of this disease. Late sown crops showed the least infection by
yellow mosaic disease. Control of Bemisia tabaci by Metasystox, parathion E 605
and diazinon 20E in early sown crops also reduced the disease appreciably. The
effect of Metasystox was statistically mos significant. [AS]
*0703 Nene, Y.L. 1973. Control of Beuisia tabaci Genn.: a vector of several
plant viruses. INDIAN JOURNAL OF AGRICULTURAL SCIENCES, v.43(5):433-436.
[En] [En Abstj (REP.MB-1965)
An experiment was conducted to find out the insecticides that could kill in
the shortest possible time the whitefly, Bemisia tabaci Genn., a vector of
several plant viruses. Ambithion, phoxim, malathion and parathion among
non-systemic insecticides and monocrotophos among systemic insecticides gave a
quicker kill of whitefly adults, but none of the insecticides could kill
whitefly adults in less than 20 mmn. Non-phytotoxic mineral oil at 2% quickly
killed the adults by immobilizing them in less than 3 min after they settled on
the oil-sprayed leaf surface. The yellow mosaic virus of mungbean (Vigna
radiata) could be acquired as well as inoculated in blackgram (V. mungo) by
whitefly adults in a feeding period of 15 min. Mineral-oil sprays, by quick
immobilization of the adults, could completely prevent the transmission of the
virus in glass-house tests. The mineral oil was also ovicidal. The results
suggest the mineral oil in combination with a systemic insecticide should give
promising results in the control of whitefly transmitted viral diseases under
field conditions. [AS)
*0704 Nene, Y.L. 1973. Note on a fungus parasite of Bemisia tabaci Gen., a
vector of several plant viruses. INDIAN JOURNAL OF AGRICULTURAL SCIENCES,
183