Biology of Pentalonia nigronervosa F. Caladii Van der goot, vector of Katte disease of cardamom

dc.contributor.author	Rajan, P.
dc.date.accessioned	2014-05-27T08:41:07Z
dc.date.available	2014-05-27T08:41:07Z
dc.date.issued	2007-02-08
dc.description.abstract	In cardamom (Elettarla cardamomum Mat on), the aphid Pentalonia nigronervosa 1. catadii van der Goot was found in small colonies underneath the leaf sheaths of older or partially dried pseudostems. The aphid is viviparous and reproduces partheno-genetically. It completes its life cycle in 10-15 days with four instars. The longevity of the adult ranges from 8 to 26 days, with 26-36 overlapping generations during an year under Coorg conditions. The percentage of transmission of katte virus showed a positive correlation with the increase in the age of the nymph. In the field, winged (alate) forms of the aphid were found maximum during December - May. In addition to cardamom, the aphid was found breeding on plants like Colocasia sp., Alocasta sp. and Caladtum sp. The Coccinellid beetles Pullus sp. and Coccinella transversalis and maggots of Syrphid flies Ischiodon scutellaris, Paragus tibialls and Episyrphus viridaureus and an unidentified Hemorobiid were recorded as predators of this aphid.	en_US
dc.identifier.citation	J.Plantn.Crops 1981 v-9 i-1 p-34-41	en_US
dc.identifier.uri	http://hdl.handle.net/123456789/1875
dc.language.iso	en	en_US
dc.title	Biology of Pentalonia nigronervosa F. Caladii Van der goot, vector of Katte disease of cardamom	en_US
dc.type	Article	en_US

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