First, the incidence of black fruit disease from May to August, harming green fruit, buds and flowers; after the onset, the fruit appeared brown lesions. Control measures: Ditch drainage, remove the disease. The results were sprayed with a 1:1:100 Bordeaux mixture and sprayed with 50% Tuzet WP 600 times immediately after the rain. Second, the incidence of root rot in late June, July to August is more serious. The roots became black at the beginning and gradually rotted, and then the upper part of the ground withered and the whole plant died. Control measures: Water the roots with 50% thiophanate-methyl 1000-1500 times or 50% carbendazim 1000-1500 times. Third, fruit flies are mainly harmful to young fruit, 2-3 generations a year, and their cockroaches are wintering in the soil. Control measures: Use 80% dichlorvos EC 1000 times or 40% Dimethoate 1500 times, spray once every 7-10 days, even spray 3-4 times, can also use poisonous soil to kill the adults or artificial in the initial emergence Remove the capsule. 4. Aphids are harmful to young shoots, leaves, and young fruit. They occur several generations a year. The most serious hazards occurred from late May to mid-July. Control measures: 40% dimethoate emulsion 2000 times, spray once every 7-10 days, even spray three times. Fifth, rickets for more than a year. In mid-to-late April, adults began to lay eggs, and then the larvae invaded the tissues, causing the tissues to become deformed and turning into blue-black ticks, which were harmed in the following year. Control measures: In the early stage, spray 40% Dimethoate 1500-2000 times. Sixth, adult worms and larvae of negative worms are harmful to young leaves. In severe cases, they can completely take light from the leaves. Three generations occur in one year, and the worst in June-July. Preventive measures: 7-8 months with 40% dimethoate 1500-2000 times or 80% dichlorvos EC 1500 times, once every 7-10 days, spray 3-5 times.
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