PNABD246.pdf

*0708 Rangaraju, R. ; Chenulu, V.V. 1980. A new method for counting
whitefly (Beisia tabaci Gen.) population In mng bean (Vigna radiata (L.)
Wilczek). CURRENT SCIENCE, v.49(21):825-826. [En] (A:PS)
According to the habit of whiteflies to disperse sideways or upwards on
being disturbed, a new method for counting whiteflies in mungbean was devised.
The method comprises using a bell jar of suitable size (height x diameter: 15 x
21 cm or 50 x 29 cm) to cover the plant and slightly disturbing the pests. All
the whiteflies on the plant immediately left the plant and rested on the inner
wall of the bell jar and started moving upwards towards light. Whitefly counts
were then taken. This method proved much convenient as the data could be
collected with ease and considerable economy of time and labor. [THH]
*0709 Murugesan, S. ; Chelliah, S. 1981. Efficacy of insecticidee in the
control of Benisia tabaci (Genn.), a vector of the yellow-mosaic virus disease
on greengram. INDIAN JOURNAL OF AGRICULTURAL SCIENCES, v.51(8):583-584. [En]
[En Abst] (A:PS)
A 2-year field experiment was conducted to assess the efficacy of
insecticides and emulsifiable oil in controlling the whitefly, Bemisia tabaci
(Genn.), and checking the incidence of the yellow mosaic disease on greengram,
[Vigna radiata (Linn.) Wilczek]. Monocrotophos and disulfoton significantly
reduced the whitefly population, but Metasystox and monocrotophos were
effective in reducing the mosaic incidence. Monocrotophos at 0.25 kg a.i./ha
applied 3 times at 10-day intervals starting from the 15th day of sowing was
more effective than other chemicals in bringing down the whitefly population,
disease incidence and intensity of symptoms, and in increasing the grain yield.
[AS]
*0710 Yein, B.R. ; Singh, Harcharan 1982. Effect of pesticides and
fertilizers on the pollution of whitefly and incidence of yelluw-mosaic virus
in greengram. INDIAN JOURNAL OF AGRICULTURAL SCIENCES, v.52(12):852-855.
[En] lEn Abst] (A:PS)
Soil application of aldicarb (1.5 kg a.i./ha) proved the most promising
treatment in reducing the whitefly (Bemisia tabaci Gennadius) population on
mungbean [Vigna radiata (Linn.) Wilczekj. This treatment gave maximum reduction
k66-67%) of Lhe pest in the early stage (5 weeks after sowing the crop).
Application of aldicarb alone or in combination with endosulfan and captan
reduced the virus-infected plants by 31-39% and 25-46% when compared with the
control in 1975 and 1976, respectively. The use of aldicarb in combination with
fertilizers uiru :educed the incidence of yellow-mosaic virus. Application of
nitrogenous ana phosphatic fertilizers without the use of insecticides
encouraged the build-up of the whitefly population as well as the incidence of
yellow-mosaic virus. For getting higher yields of mungbean, it was necessary to
use both the pesticides and the fertilizers. [AS]
*0711 Gupta, P.K. ; Singh, J. 1983. Effect of systemic granular
insecticides on whitefly population and yellow-mosaic infection in greengram.
INDIAN JOURNAL OF AGRICULTURAL SCIENCES, v.53(8):737-742. [En] [En Abst]
(A:PS)
When applied at 2.0 kg a.i./h. in summer as well as in the rainy season,
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