Annual Prevention and Control Scheme of Diseases and insect pests with reduced Pesticide Application in Apple Orchard

June pest control

1. Disease control. In the middle and late June, continuous rainy weather often occurs in the north area. Before continuous rainy weather occurs, protective fungicides with strong adhesion, rain washing resistance and long duration shall be sprayed throughout the orchard to prevent massive reproduction and infection of pathogens during rainfall; in the middle and late June, it is suggested to spray Bordeaux mixture in areas with average rainfall exceeding 20mm. Before spraying, inspect the orchard to remove dead branches, rot spots, dry rot spots and other infectious bacteria, and monitor the occurrence and damage of various pests.

2. Pest control. June is the key period for controlling spider mites, golden thread moth and peach fruit borer. Generally, the pesticide should be applied once after bagging or combined with bagging. The type and time of pesticide application should be determined according to the monitored pest species, insect population density and pest occurrence trend. After entering June, inspect the orchard every 7~10 days, and combine sex attractant, trap lamp and so on. In June, the population dynamics of red spider, golden thread moth and peach fruit borer were monitored, and the population dynamics of cotton aphid, mealybug, leaf-eating insect and stem-borer were monitored. The pest was mainly monitored by sex traps. When the number of trapped moths was large, the pest was sprayed once from the fifth to seventh day after the peak of trapping. Chlorantraniliprole and pyrethroid can be considered to control peach fruit borer; triazoletin, abamectin or spirofen can be considered to control spider mite. Other pest control can consider emamectin, abamectin, imidacloprid and other pesticides. If conditions permit, fungicides and insecticides can be considered mixed to reduce the number of applications.

3. Prevention of diseases after girdling of branches. After apple branch girdling, in order to prevent infection of ring rot fungus and rot fungus, 25% pyraclostrobin 500~600 times solution or 70% carbendazim or thiophanate-methyl wettable powder 100~200 times solution can be used to coat the wound.

July pest control

1. Disease control. July is the key period for controlling brown spot, anthracnose leaf blight, branch ring disease, rot disease and other diseases. Generally, it is applied once or twice a year. After spraying fungicides in June, when more than 3 times of rainfall greater than 10 mm, lasting more than 24 hours of rainfall, or more than 7 days of continuous rain, immediately spray internal fungicides after rain. It is suggested that pyraclostrobin be sprayed as the main effective component on susceptible varieties of anthracnose leaf blight, and triazole as the main effective component on orchards with serious brown spot disease. In the middle and late July, before the forecast rainfall, the protective fungicide with strong adhesion, rain washing resistance and long duration shall be sprayed once more in the whole garden to prevent the large number of propagation and infection of germs during rainfall; in the late July and early August, it is recommended to use Bordeaux mixture in the areas where the average rainfall exceeds 20 mm. Every time you spray, you have to take care of the branches. Before spraying fungicides, it is recommended to inspect orchards to remove dead branches, rot spots, dry rot spots and other infective sources while monitoring the occurrence of various pests.

2. Pest control. July is also the key period for controlling various pests. Generally, it is applied once a year; the specific application frequency, pesticide type and application time shall be determined according to the monitored pest species, insect population density and pest occurrence trend. Pest monitoring and forecasting should be combined with sex attractants, trap lamps, etc., and inspect orchards once every 7~10 days; focus on monitoring 3 species of red spiders in July (Tetranychus bipunctatus, Apple spider, Hawthorn spider) and Chrysosphaera chrysophora, followed by fruit borers (pear fruit borer, peach fruit borer, etc.), leaf-eating pests (boat caterpillar, thorn moth, lantern moth, American white moth), mealybug Connyi, stem borer and other pests; insecticides can be considered abamectin, emamectin salt, chlorfenuron, triflumuron, etc., acaricide can be considered spirodiclofen (mite risk), triazole tin, abamectin and other pesticides. If conditions permit, fungicides and insecticides can be considered mixed to reduce the number of applications.