Ma Zhifeng said that due to the high temperature in August, pest and disease activity is still relatively active. In particular, early defoliation, ring rot disease, anthrax, etc. are more harmful in rainy years. The damage degree of various leaf-feeding pests such as boat-shaped caterpillars, leaf-worms, leaf-hoppers and other pests also tends to increase. Apple rot and root rot also entered the second peak of the year in late August. In drought years, spider mites still have the potential for outbreaks. Therefore, the apple orchard farmers in August should control these pests and diseases.

Focusing on disease prevention and control in stages, Ma Zhifeng reminded farmers that from August onwards, attention should be paid to spraying a fungicide every 10 to 15 days for the orchard, and use of systemic fungicides, such as 3% polymycin or 52.5% Carbendazim or 16% imidazolinil or 12.5% ​​diniconazole or 25% myclobutanil or 25% propiconazole, etc., and alternate spraying of protective bactericide and systemic bactericide, protective bactericidal Agents such as DuPont Epro, Pike, Dasheng, etc.

In August, the high temperature and drought, the fruit grower should pay close attention to the occurrence of leafhoppers, gold moths, pear nets. Can be sprayed 1 to 2 times 10% fenbutatin oxime or 1.8% avermectin or 50% chlorpyrifos EC or 20% thioresulfuron EC to control.

In late August, we must carefully inspect for rot disease, timely cure rot disease, and disinfection protection. Trunks and grasses are trapped to kill the hidden winter fruit pests.

Phosphorus and potassium topdressing to promote coloring from the beginning of August to the fruit coloring period, fruit growers should pay attention to the top outside the application of phosphorus, potassium fertilizer-based foliar fertilizer, increase fruit sugar accumulation, promote fruit coloring. Currently, it can be used in combination with sprays to spray 3 to 4 0.5% potassium dihydrogen phosphates on the front and back sides of the leaves, which is beneficial to the coloring of fruits of medium-maturing varieties, increasing the sugar content, enhancing the resistance to transport, and favoring the expansion of fruits of late-maturing varieties. quality. In addition, it is also possible to apply phosphorus and potassium fertilizers to the soil, which will help to promote flower bud differentiation, inhibit excessive shoot growth, and prevent apple from falling before harvest.

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