Browsing by Author "Dhileepan, K."
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Item Aspergillus candidus link as an entomopathogen of spindle bug Carvalhoia arecae M & C (Miriidae: Heteroptera)(2007-02-08) Dhileepan, K.; Nair, R.R.; Leena, S.Item Aspergillus candidus link as an entomopathogen of spindle bug Carvalhoia arecae M & C (Miriidae: Heteroptera)(1990) Dhileepan, K.; Nair, R.R.; Leena, S.Item Incidence and Intensity of Rhinoceros Beetle Infestation in Oil Palm Plantations in India(2007-02) Dhileepan, K.Item Insect pests of intercrops and their potential to infest oil palm in an oil palm-based agroforestry system in India(2007-02) Dhileepan, K.Among the various intercrops in the oil-palm-based agroforestry system, only cacao shared a common pest complex with, oil palm. Insect pests of other intercrops such as Albizzia, Ailanthus, casuarina and Subabul are host-specific and do not infest oilpalm. No Pest incidence was noticed in Eucalyptus and Australian black wood.Item Insect Pests of Oil Palm (Elaeis guineensis) in India(2007-02) Dhileepan, K.Item Investigations on avian pests of oil palm, Elaeis guineensis Jacq. in India(1989) Dhileepan, K.The common myna Acridotheres tristis Linn., the jungle crow Corvus macrorhynchus Wagner and the house crow Corvus splendens Viellot are the major pests of oil palm in India. Other birds like crow pheasant Centropus sinensis Stresmann, parrot Loriculus sp. and pariah kite Milvus migrans Sykes also feed on oil palm fruits. These birds feed on the fleshy mesocarp of the ripe fruits resulting in heavy fruit loss, significantly reducing oil yield. Gizzard and intestinal content analysis indicated that oil palm fruits are the major source of food for these birds. Observations on 1657 oil palm fruit bunches during 1985-86 revealed that 76% of the ripe bunches and 5-6% of the unripe bunches were damaged by birds. The damage by birds was either 'partial' or 'complete', where 40-50% and 80-100% respectively, of the individual fruit weight was lost. The partial fruit damage was more common in 130-160 day-old bunches and the complete fruit damage increased after 150 days of fruit set. Fruit loss due to bird damage was higher in palms in the border area of the plantation (2-3 kg/bunch) than in the interior (1-3 kg/bunch). It is estimated that around 2-8 tonnes of fresh fruits/ha/yr, equivalent to 420 kg of palm oil, are lost due to bird damage.Item Investigations on avian pests of oil palm, Elaeis guineensis Jacq. in India(2007-02) Dhileepan, K.Item Pests(2007-02) Dhileepan, K.; Jacob, S.A.Item Pests of Oil Palm(2007-02) Dhileepan, K.Item Pollination potential of introduced weevil, Elaeidobius kamerunicus, in oilpalm (Elaeis guineensis) plantations(2007-02) Dhileepan, K.; Nampoothiri, K.U.K.Introduction of the pollinating weevil (Elaeidobius kamerunicus Faust; of oilpalm (Elaeis guineensis Jacq.) in India increased the fruit set from 36.87 to 56.10%, resulting in 40% increase in bunch weight and 11% increase in fruits : bunch ratio. Weevil pollination also decreased the parthenocarpy from 34.3 to 24.3%, resulting in 28.4% reduction in parthcnocarptc fruit: weight ratio. Though wind-f assisted pollination (60.45%) was more efficient than the wind + weevil pollination (56.10%); the latter produced compact bunches owing to pollination of even the spikelets at the bottom of the inflorescences by weevils.Item Trials on the Protection of Oil Palm Fruit Bunches from Bird Damage in India(1990) Dhileepan, K.