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矢尖蚧是柑桔重要害虫,一经发生,往往难以防治。有机磷农药,如氧化乐果、水胺硫磷对雌成蚧几乎不起作用。据报道,机油乳剂能有效控制矢尖蚧全年危害。我们于1987年7月中旬使用不同浓度的机油乳剂防治第一代雌成蚧,探索选择较佳浓度,以供在生产上推广使用。 试验于1987年7月15日在城西乡冲锋八组15年生锦橙园内进行。供试药剂为江苏省镇江农药厂生产的机油乳剂。设四个处理:机油乳剂30、50、70倍液及清水对照,三次重复,以单株为小区,按顺序排列,在7月15日第一代雌成蚧盛期,以工农16型背负式喷雾器喷洒树冠至滴水为度。喷药后22天,每株随机摘取10片有雌成虫的叶片调查死活虫
Agrimony Kui is an important citrus pests, once occurred, it is often difficult to control. Organophosphorus pesticides, such as omethoate, and acetochlor almost have no effect on adult goosebugs. It is reported that the oil emulsion can effectively control the year-old harm scale Agrimony. We use different concentrations of oil emulsion in mid-July 1987 to prevent and control the first generation of female scales, to explore and choose the best concentration for the promotion of production. Test on July 15, 1987 in Shixi Township Charge eight groups of 15-year-old Orange Park. Test agents for the Jiangsu Zhenjiang Pesticide Factory production of oil emulsion. Set four treatment: 30,50,70 times the oil emulsion and water control, three replicates to single plant for the district, in order, on July 15 the first generation of female Cheng Bao Sheng, workers and peasants 16-type carrying Spray canopy to drip level. Twenty-two days after spraying, 10 randomly selected adult female leaves of each plant were surveyed for live and dead worms