松实小卷蛾和松梢螟的防治研究

A study on the control of Petrova cristata and Dioryctria rubella

通过对松实小卷蛾、松梢螟在不同时期发生规律的观察和多种药剂,混剂的系列防治试验,结果表明,1.4月中下旬和5月下旬分别为松实小卷蛾和松梢螟的初孵幼虫盛期,是防治的最佳时期。2.在4月中下旬一次和4月中下旬,5月下旬二次采用20％氯氰菊酯(20毫升/亩)、40％氧化乐果(75毫升/亩)或其混剂(氯氰10毫升+氧化乐果40毫升/亩)对二种害虫的防治效果达80～90％。

The observation of the occurrence regularity in various period and the control experiment with various pestisides on the pine shoot moth (P. cristata) and the splendid knot-born moth (D. rubella) were cnducted. The results indicated that the peak of juvenile instar larvae of the pine shoot moth and the splendid knot-born moth emerge in the second and last ten days of April and the last ten days of May, respectively, it is also the best time for control. By spraying 20% cy-permethr in(20ml/mu). 40% omethoate(75ml/mu), and their mixture(cypermethr in 10ml+omethoate 40ml/mu), the control effectivity can reach 80% to 90% during the peak of juvenile instar larvae.