Screening of coconut germplasm against coconut eriophyid mite, Aceria guerreronis Keifer in Andhra Pradesh
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Date
2010
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Abstract
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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Keywords
Aceria guerreronis, coconut eriophyid mite, crosses, varieties
Citation
Journal of Plantation Crops, 2010, 38 (1): 53-56