Browsing by Author "Dubey, O.P."

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    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.
  • Thumbnail Image
    Item
    Biology and bionomics of insects pests of cinnamon
    (1978-06) Vijay Singh; Dubey, O.P.; Radhakrishnan Nair, C.P.; Pillai, G.B.
  • Thumbnail Image
    Item
    Pests of Cashew and their Control in India— A Review of Current Status
    (1976-12) Pillai, G.B.; Vijaya Singh; Dubey, O.P.
    The major pests affecting cashew in India are the stem and root borers, tea mosquito, leaf miner, and leaf and blossom webber. Among the less serious pests, the defoliating caterpillars, shoot tip and inflorescence caterpillars, leaf thrips, flower thrips, leaf beetles and weevils, apple and nut borers and nut crinkler, at times appear in severe proportion in some pockets and cause considerable damage. Nature and extent of damage, biology, seasonal abundance, and control measures of these pests are discussed in detail. The natural enemies of different pests are also listed.
  • Thumbnail Image
    Item
    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.