Seasonal Abundance and Diversity of Aphids (Homoptera: Aphididae) in a Pepper Production Region in Jamaica
نویسندگان
چکیده
Seasonal dispersal and diversity of aphid species were monitored on pepper farms in St. Catherine, Jamaica throughout 1998 and 1999 to identify the most likely vectors of tobacco etch virus (TEV) in pepper Þelds. Flight activitywasmonitoredweekly on Þve farms usingwater pan traps. More than 30 aphid species were identiÞed, 12 of which are new records for Jamaica. Ninety-two percent of the aphids captured from October 1998 through July 1999 belonged to only seven of the 30 species identiÞed. Of these seven species, Aphis gossypii Glover and those in the Uroleucon ambrosiae (Thomas) complex comprisedmore than two-thirds of the total. Five knownvectors ofTEV were captured:A. gossypii,Aphis craccivoraKoch,Aphis spiraecolaPatch,Myzus persicae (Sulzer), and Lipaphis pseudobrassicae Davis. Generally, more aphids were collected frommid-September through mid-May than frommid-May throughmid-September.The inßuence that rainfall and temperaturehad on periods of aphid ßight activity also was investigated. Results indicated that ßight of some species increased 3Ð4 wk after a rainfall event, whereas temperature did not appear to affect ßight activity. High populations of A. gossypii as well as the presence of four additional known TEV vectors were encountered in October and November, which is the period that signiÞcant acreage is transplanted to pepper for harvest to coincide with the winter export market. Because pepper is most vulnerable to yield loss when young plants become infected with TEV, pepper production in Jamaica may be threatened if commonly abundant species such as A. gossypii are carrying TEV. Based on this information, implications for management of pepper viruses and their aphid vectors in Jamaica are discussed.
منابع مشابه
فهرستی از شته های استان آذربایجان غربی ( THE LIST OF APHIDS OF WESTERN AZARBAYEJAN ( HOMOPTERA: APHIDIDAE
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