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本县防治榆兰金花虫,当前推广乐果原液涂环和根埋呋喃丹颗粒剂(甲基硫环磷)。杀虫效果很好,但用药量大,费工多,成本高。在去年,我们用20％杀灭菊酯乳剂,(上海十四农药厂),以机械喷雾防治榆兰金花虫幼虫,取得较好的效果。 施药方法:喷药浓度为6000倍和8000倍,寄主杆树为8年生,共60亩,每亩80株,树高6.5—7米,郁闭度0.8,有虫株率100％。
The county prevention and treatment of elm gold flower insects, the current promotion of dimethoate Tu ring and root of carbofuran granules (methyl sulfide phosphorus). Insecticidal effect is very good, but a large amount of medication, more labor, high cost. In the past year, we used 20% fenvalerate emulsion (Shanghai Fourteen Pesticide Factory) to prevent and cure the Ulmus laevigata larvae with mechanical spraying to achieve better results. Application methods: spraying concentration of 6000 times and 8000 times, the host pole tree for 8 years, a total of 60 acres, 80 per acre, tree height 6.5-7 meters, canopy density 0.8, the worm strain rate of 100%.