廉江市荔枝蒂蛀虫发生为害特点与防治对策

2002~2015年,在良垌镇、新民镇、青平镇、石颈镇、河唇镇的不同类型果园,定期调查荔枝第一次生理落果至采果期结束的落地果实,采集回室内观察。结果表明:廉江市荔枝蒂蛀虫发生世代数和主害代稳定;不同荔枝品种发生期及受害时间差异较大;不同荔枝品种虫口密度及受害程度差异大;虫口密度和种群数量变动与荔枝花果期密切相关。建议采取荔枝园间伐回缩技术,改善荔枝园生态环境等农业措施及选用高效低毒低残留农药于成虫羽化高峰期和卵孵化高峰期喷施的防治技术。

Damage Characteristics of Conopomorpha sinersis Bradle in Lianjiang City and Control Measures

The main characteristics of Conopomorpha sinersis Bradle was that generation number and damage genertion was stable in Lianjiang City. Difference between occur period,damage time on different species of lichee. Difference between population density, damage degree on different species of Lichee. Population density and population amount change was closely related with the Lichee flower and fruit period. Take technique of cutting,improving the ecological environment of lichee orchard and used the hige efficiency and low toxicity and low residue pesticides against Conopomorpha sinersis Bradle on the peak of adult emergence and egg hatching peak.