Browsing by Author "Vijay Singh"

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    Aerial spraying against tea mosquito in cashew
    (2007-02-08) George, M.V.; Vijay Singh; Thomas Peter
    Comparative efficacy of ultra low volume (aerial spray) and the high volume spray (employing rocker sprayer) for the control of tea mosquito was evaluated during 1977-78 season in the cashew plantations of Kerala Plantation Corporation at Muliyar, Adhur and Perla villages, in Kerala, India. Two sprays were given in November, 1977 and January, 1978 synchronising with the emergence of new flushes and inflorescences. The infestation of shoots and inflorescences was significantly reduced in the plots which received aerial spraying and the yield increase was 40 per cent for the number of nuts and 37 per cent for the weight of nuts harvested over the plots receiving high voulme spray (2.2 kg Vs 1.6 kg per tree).
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    Biology and bionomics of insect pests of cinnamon
    (2007-02-08) Vijay Singh; Dubey, O.P.; Radhakrishnan Nair, C.P.; Pillai, G.B.
    The major pests affecting cinnamon include Chilasa clytie L., Sorolopha archimedias Meyr., Acrocercops sp. near telestis Meyr., Popillia complanata Newm., and Singhala helleri Ohs. The minor pests are Sauris sp., Ceroplastes rubens Mask., Apoderus scitulus Walker, and Oecophylla smaragdina F. The nature and extent of damage and biology and seasonal abundance of these pests are discussed.
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    Biology and bionomics of insects pests of cinnamon
    (1978-06) Vijay Singh; Dubey, O.P.; Radhakrishnan Nair, C.P.; Pillai, G.B.
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    Seasonal Abundance of Tea Mosquito (Helopeltis antonii Sign.) on Cashew in Relation to Meteorological Factors
    (1979) Pillai, G.B.; Vijay Singh; Dubey, O.P.; Abraham, V.A.
    Seasonal fluctuations in the population density of tea mosquito, Helopeltis antonii Signoret, were studied during June 1972 to May 1977 at weekly intervals. The build up of pest population commenced in October - November synchro^ nising with the emergence of new flushes in cashew after the cessation of monsoon showers. The pest population reached its peak in January. Tea mosquito was active in the field in different degrees of intensity till May. The population build up of the pest was found to be negatively correlated with the meteorological factors like minimum temperature, minimum relative humidity and rainfall and positively with sunshine. The most favourable period for the rapid multiplication and population build up of the pest was between December to February. During the monsoon season, tea mosquito population was totally absent.