摘要
樟木虱 (TriozacamphoraeSasaki) 1998年在上海市环城绿带浦东三林区域的部分地段香樟树(Cinnamomumcamphora)上首次发现 ,2 0 0 1年已扩展至整个绿带约 5 0hm2 范围香樟 ,株发生率 90 %以上 ,单叶寄生最多虫口可达 5 0 0头。据 2 0 0 1～ 2 0 0 2年定点和采样观察 ,该虫在上海地区以 1年发生 3代为主 ,少部分 1年发生 2代 ,极少数 1年发生 1代 ,均以 2龄若虫在樟树叶背越冬。越冬若虫 2月中、下旬开始发育 ,3月上旬少量羽化 ,4月底成虫全部羽化。 4月上旬始见卵和若虫 ,4月下旬第一代若虫孵化率可达 90 % ,5月上旬卵全部孵化 ,此时为防治适期。在第 1代若虫 1～ 2龄时选择农药进行防效试验 ,10 %吡虫啉 (Imidacloprid)WP 30 0 0倍、2 5 %阿克泰 (Thiamethoxam)WC 2 0 0 0 0倍校正防效分别达 97.89%和 97.6 1%。
Since Trioza camphorae was first found in Cinnamomum camphora in the Sanlin section of Pudong New District Round-the-city Greenbelt in 1998, it has spread in the whole greenbelt of about 50 hm 2 in which 90% of the trees were attacked by the insect and the maximum insect population on a leaf reached 500.According to spot observation during 2001～2002,most of the insects have three generations a year in Shanghai, small part of them have two generations a year, and only a few of them one generation a year. They overwinter as 2nd-instar nymphs on the back of the leaves. The hibernating nymphs grow initially in the 2nd or last ten days of February, a part of imagoes emerge in early March, and all the imagoes emerge by the end of April. The eggs and nymphs appear in early April. The first generation nymph hatching rate can reach 90% in late April and all the eggs hatch in early May. The chemical control test showed that the control efficiency reached 97.89% and 97.61% by using 10% imidacloprid WP or 25% thiamethoxam EC at the peak hatching stage of the first generation nymphs.
出处
《上海农业学报》
CSCD
2004年第2期80-84,共5页
Acta Agriculturae Shanghai
基金
浦东新区科技专项资金项目 (PK -2 0 0 2 -2 3 )
关键词
樟木虱
生物学特性
香樟害虫
防治
Cinnamomum camphora Presl
Trioza camphorae Sasaki
Biological character
Control
