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苹果树病害防治打药不在次数多,关键要打得巧,即要把药用在防治病害的关键时期。要做到这一点,必须了解生产中主要病害的发生规律,然后根据发生规律,在病害最敏感的时期提前用药,把病菌控制在未萌发或未侵染状态,达到事半功倍效果。
Prevention and treatment of apple tree disease is not the number of fight drugs, the key to play clever, that is, to the medicinal use in disease prevention and control of a critical period. To do this, we must understand the occurrence of major diseases in production, and then according to the law of occurrence, in the most sensitive period of disease pre-medication, the germs in the control of non-germinated or non-infected state, to achieve a multiplier effect.