Browsing by Author "Chalam, M.S.V."

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    Monitoring and Management of Coleopteran pests of Coconut through Pheromone traps in Andhra Pradesh
    (2010-03) Sujatha, A.; Chalam, M.S.V.; Arulraj, S.
    Among the insect pests ofcoconut, the red palm weevil Rhynchophorus ferrugineus and rhinocero~ beetle, Oryctes rhinoceros are reckoned as important. Roving survey made in eight coconut growing districts of Andhra Pradesh during the years 2000 to 2008 showed low to medium incidence of rhinoceros beetle in all the districts and severe incidence ofred palm weevil in East Godavari district. This information on relative severity of the two pests was useful to guide in suitable interventions for integrated pest management. Efficacy of pheromone lures of rhinoceros beetle (Ethyl 4-methyl octonoate) and red palm weevil (4 methyl -5 -nonanol) from different sources were tested. There were distinctly high catches of rhinoceros beetle recorded in rhino lure during April, May, June, September and October months, while red palm weevil lures recorded higher catches of weevils in March, April, May, June and July months. Among the sources compared, rhino lure appeared superior for trapping rhinoceros beetle, while the red palm weevil lure from CPCRI, Kayangulam proved superior against red palm weevil. Trapping and destruction ofrhinoceros beetle through pheromone traps resulted in the reduction of leaf and spindle damage by 27.3 and 59.9%, respectively. Use of pheromone trap for red palm weevil was found to effectively reduce the palm damage by 78% and 93% dead palms.
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    Screening of coconut germplasm against coconut eriophyid mite, Aceria guerreronis Keifer in Andhra Pradesh
    (2010) Sujatha, A.; Chalam, M.S.V.; Kalpana, M.
    Eight tall coconut varieties (45 years age) and 17 new hybrids (15 years age) available at HRS, Ambajipeta were screened for resistance against coconut eriophyid mite, Aceria guerreronis Keifer for four years [2004 to 2007] under natural conditions of coastal ecosystem ofAndhra Pradesh. Out ofthe eight varieties; the lowest mite damage index was recorded in Laccadive Ordinary (LO) -1.99, Andaman Ordinary (AO) -2.10, Philippines Ordinary (PO) -2.23 and East Coast Tall (ECT) -2.24 and West Coast Tall (WCT) -2.54 while Laccadive Micro (LM) -2.43 recorded the highest damage index. Among the 17 coconut hybrids screened, ECT x GB (Godavari Ganga-the first hybrid from AndhraPradesh) -1.87, LO x COD -1.95, VHC-I (ECTx MGD) -2.08 recorded the lowest mite damage whereas, LM x GB -2.88, Java x GB -2.83 and Fiji x GB -2.75 recorded the highest damage among the crosses.
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    Status of Coconut Blackheaded Caterpillar, Opisina arenosella Walker and Evaluation of Bio-agents
    (2009) Sujatha, A.; Chalam, M.S.V.
    Regular monitoring of gardens provided a fore warning for timely adoption of control measures and good pest suppression. Release of larval (Bracon hebetor Goniozus nephantidis) and pupal (Brachymeria nosatoi) parasitoids could bring down pest population from 16.73 to 8.73 / palm with 30% parasitisation. Cardiastethus exiguus an anthocorid predator also proved effective in pest suppression from 102.3 to 5.4 / palm with 21.5% of population. The release of bio-agents could be employed for successful suppression of blackheaded caterpillar which was safe, economical and perpetual wing of IPM.
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