Record Details

Incidence of Erythrina gall wasp (Quadrastichus erythrinae Kim), an invasive insect pest on Erythrina spp., in major black pepper (Piper nigrum L.) areas in Kerala and Karnataka, India

DSpice at Indian Institute of Spices Research

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Field Value
 
Creator JACOB, T K
DEVASAHAYAM, S
 
Date 2010-07-29T05:58:50Z
2010-07-29T05:58:50Z
2010
 
Identifier http://hdl.handle.net/123456789/525
 
Description Surveys were conducted in 276 black pepper (Piper nigrum) gardens in 13 taluks in 4 districts (Idukki, Kozhikode, Kannur and Wayanad) in Kerala and 3 taluks in 1 district (Kodagu District) in Karnataka , India, during April to July 2008, to study the incidence of Erythrina gall wasp (Quadrastichus erythrinae), on Erythrina spp., used as standards for trailing black pepper vines. The surveys indicated that that the infestation by Erythrina gall wasp was observed in all the locations surveyed and the percentage of trees infested by the pest was signif icantly higher in Wayanad District (59.6%) which was on par with Idukki (53.4%), Kodagu (51.8%) and Kannur (39.1%) districts. The percentage of twigs infested by the pest was also significantly higher in Wayanad District (39.7%) which was on par with Idukki (35.5%), Kodagu (33.4%) and Kozhikode (31.6%) districts. The severity of incidence var ied on var ious species / types of E. variegata and was significantly higher in E. variegata (white-thorn type) wherein a mean of 91.8% trees and 66.8% twigs were infested by the pest. The various species / types of Erythrina were rated for their resistance / susceptibility based on the mean percentage of infested twigs and E. variegata (dense thorn type) could be classified as resistant (43.2% twig damage). The surveys indicated that infestation of Erythrina spp. by the gall wasp is one of the major constraints for growth and production of black pepper vines in Kerala and Karnataka in recent
years.
 
Format 57273 bytes
application/pdf
 
Language en
 
Subject Black pepper
Erythrina gall wasp
Piper nigrum
Quadrastichus erythrinae
 
Title Incidence of Erythrina gall wasp (Quadrastichus erythrinae Kim), an invasive insect pest on Erythrina spp., in major black pepper (Piper nigrum L.) areas in Kerala and Karnataka, India
 
Type Preprint