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细菌农药,具有杀虫效率高,不污染环境,不毒害人、畜,不诱发害虫产生抗药性等优点,可是推广至今,仍有不少农户使用后防治效果不理想。据调查了解,主要原因是农户没有按照细菌农药对外界条件的要求打药。要提高细菌农药的杀虫效果,使用时,必须注意如下几点。 1.看温度 细菌农药使用的适宜温度是在20℃以上。若低于20℃,细菌的芽孢在害虫体内繁殖慢,活性蛋白质晶体也无法发挥应有的作用。据观察,在25
Bacterial pesticides, with insecticidal efficiency, does not pollute the environment, does not poison people, livestock, does not induce pest resistance and other advantages, but to promote, there are still many farmers use after the control effect is not satisfactory. According to the survey, the main reason is that the peasants did not fight the pesticide according to the requirements of the external conditions. To improve the insecticidal effect of bacterial pesticides, use, we must note the following points. 1 to see the temperature of bacteria and pesticides used in the appropriate temperature is above 20 ℃. If less than 20 ℃, bacterial spores reproduce slowly in pests, active protein crystals can not play its due role. It is observed at 25