May pear disease and pest control points:
Black spot disease The disease mainly damages snowflake pear and pear varieties. It began in mid-May, used a medicine once every 10 to 15 days, and sprayed twice. The control effect was better. The effective drug is 1.5% polyoxin 400 times, 80% M-45 or 1000 times.
The Kangzhai mealybugs are the hatching period in early May and they were also the first critical period of prevention and control. The most effective agent for Conrad's whitefly is 1200-1500 times faster than Acrylophanate or Paracetamol EC.
Tenebrio pear mealworm is a kind of aphid and it is very harmful to bagging pears. The most effective agents for controlling Tenebrio molitor are 2.5% hypertonic imidacloprid 2500-3000 times, 2.5% fleas 3000 times, 40% Saitan 2000 times. The key measures for controlling the damage of Tenebrio include: First, Tenebrio always sticks in the bark of the tree bark before spraying. Spray the medicine against the trunk and carefully spray the medicine. Secondly, the tenebrio enter the bag and climb into the bag. After the bagging, the bag should be sprayed on the mouth. Third, because the branches of the skin and the mouth of the bag are difficult to adhere to the drug, they must be added to assist in killing or harming Liping to improve the spreadability and permeability of the drug.
In early May, P. cinnamomea was the prosperous period of the generation of P. crassifolia, and it was also a critical period of prevention and control. Since the pest status in the field is already more complicated, it is necessary to consider the use of insecticide as the main insect, and to consider effective for the nymph. The more economical and effective agent is 2,000 times higher than the liquid, but also 0.3% of propofol 3000 times + 4.5% beta cypermethrin 2000 times.
May is the most critical month for combating scab, and it should be done in two ways. First, the disease should be removed in time. From the beginning of May, 5 to 7 days of inspections will be conducted once, and the lesions will be found and removed immediately. Burned or buried deeply to prevent the germs from scattering and spreading, infecting young leaves and young fruit. Second, timely spraying and prevention. According to the rainfall in May, spraying 2~3 times, the most effective and safe agent: 12.5% ​​of myclobutanil 2500~3000 times, 12.5% ​​of diniconazole 2000~2500 times, 40% of Fuxing Emulsion 8000~10000 times, 80% of students have M-45 or 1000 grams of spray.
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