四种钻蛀性龙眼梢、果害虫的空间分布及种群动态

在福建省农业科学院果树所资源圃，从1999到2000年对荔枝尖细蛾（Conopomorpha litchielle Bradly)、荔枝蒂蛀虫（Conopomorpha sineusis Bradly)、龙眼亥麦蛾（Hypitima longae Yang et Chen)和桃蛀螟（Dichocrocis punctiferalis Guenee)4种钻蛀性龙眼梢、果害虫的空间分布和种群动态进行调查,结果表明，4种害虫均在向南方位分布较多；荔枝尖细蛾幼虫在5、6、10月以第1代、第2代和第8代分别在龙眼枝梢上形成3个高峰期；荔枝蒂蛀虫幼虫在8、9月以第5、6、7代分别在龙眼枝梢和果穗上形成高峰期；龙眼亥麦蛾在6、7月份以第2代在枝梢和果穗上形成高峰期；桃蛀螟在8、9月份以第3、4代在龙眼成熟期数量最多。

The spatial distribution and population dynamic of fourbore pests on Lo ngan

We investigated the Conopomorpha litchielle Bradly, Conopomorpha sineusis Bradly, Hypitima longae Yang et Chen and Dichocrocis punctiferalis Guenee in different spaces and time from 1999 to 2000 in Fuzhou, Fujian province The results showed that pests distributed more in the south of Longan tree than in any other direction Conopomorpha litchielle Bradly mainly damaged shoots as larvae of the first,second and eight generations in May, June and October Conopomorpha sineusis Bradly mainly damaged shoots and fruits as larvae of the fifth, sixth and seventh generations in August and September. Hypitima longae Yang et Chen mainly damaged shoots and fruits as larvae of the second generation in June, July Dichocrocis punctiferalis Guenee mainly damaged fruit as larvae of the third and fourth generation in August and September.