The autumn is a critical period for orchard management. In response to the prevention and control measures of the early defoliation and rot caused by current fruit farmers, this reporter interviewed Zhang Zhicheng, an expert on fruit and fruit at Northwest Agriculture and Forestry University, who proposed that—
Early leaf disease prevention
Although early this year, the extent of damage to the early defoliation of apple trees is lighter than last year, but it cannot be taken lightly to prevent and re-infest the single plants and spots that have serious disease, resulting in the spread of the disease. Prof. Zhang said that once in August, it can be sprayed once and then sprayed once or twice in September. The effective dosage is 0.15% diammycin 400 times, 50% fluocin 1000 times, and 10% polyoxin 1000. Times of liquid and so on. "Once leaves are found, they should be promptly and effectively controlled," said Professor Zhang.
Prevention of rot in late autumn
In order to reduce the occurrence of apple tree branch rot disease in the spring of next year, we should continue to adhere to the cure after apple harvest. Mainly scrape the surface of the bark ulcers, and in the first half of November on the trunk, the main branch and then brush once again 40% of the US 50 times Fumei 50 times or 10% of the Kang Kang Bao 5 times or 0.15% 5 times the dioscin 5 .
"After rot disease is found, use Guinness plus soft water through the lesion to use a knife to cut into small squares to smear or scrape off lesions with Corruption, or artificial bark can be used." Professor Zhang suggested.
Pest control
Spraying on trees is the main method of controlling apple aphid. In early September, pests such as gold-grained silk moths, pear-grass nets, cotton aphids, boat-shaped caterpillars, red-and-white spiders, leaf roller moths and other pests occur on a tree trunk in the early September. If the leaf pests are serious, they can be treated with pyrethroids.
Prof. Zhang pointed out that the apple aphid can be controlled during the migration period (late May and early June), and the prevention and treatment of the early peak of reproduction in mid-September can be used as a remedial measure. For sporadic occurrence of orchards, early detection and early handling must be done with great effort and good governance. As far as possible in a growing season to eliminate its harm. In agricultural operations, avoid artificial transmission.
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