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防治玉米螟最好在心叶末期,撒施残效期长的颗粒剂。在目前使用的颗粒剂中以呋喃丹颗粒剂和杀螟粒颗粒剂效果为最佳。呋喃丹主要依靠进口,价格比较贵;而杀螟粒剂具有药效高,使用方便,价格低廉等特点。 “杀螟粒”颗粒剂是用乙基对硫磷原油,以砂为载体,配添加粘结剂、湿润剂、吸附剂等,用包衣的方法加工而成。产品为灰褐色颗粒状,使用方便,残效期长。 使用方法:对春玉米或夏玉米均可采用心叶末期一次施药(螟卵孵化初期)。施药时,用手或点施器,将颗粒直接撒入心叶内(即喇叭口内)。施药量因地区及虫害轻重略有差别,每株1克左右,每亩5市斤左右。施药的时间和部位,对药效影响很大,应严格掌握,力求每株用药量均匀。
Prevention and control of corn borer is best at the end of the heart, spreading residual long period of granules. Among the currently used granules, carbofuran granules and fenitrotic granules are the most effective. Carbofuran relies mainly on imports, the price is more expensive; and kill the rod with a bolt with high efficacy, ease of use, low prices and so on. “Diaoqiaobili” granules are ethyl parathion crude oil, sand as a carrier, with added binder, humectant, adsorbent, etc., with the coating method of processing. Taupe granular products, easy to use, long residual period. How to use: The spring or summer corn can be used at the end of a leaf late application (borer eggs early incubation). Application, the hand or point Shi Shi, the particles directly into the heart within the leaf (ie bell mouth). Application rate due to the region and the slight difference in pest weight, about 1 grams per plant, about 5 pounds per acre. Application time and place, a great influence on efficacy, should be strictly controlled, and strive to use each drug evenly.