Apples, pears, and peaches are the three largest tree species in northern China. In order to help farmers effectively prevent and control pests and diseases, the pest control technologies during the flowering period are described as follows:
For apple trees, such as new red stars, red stars, marshals, and Beidou species, which are susceptible to mycotic diseases, and orchards with a heavy Mycoplasma disease in previous years, they each sprayed 1000 times more fluids or 1000 times at the early flowering stage and late flowering stage respectively. Liquid thiophanate-methyl or 1.5% polyoxin 500 times, or 3% "Fangkang 120" 800 times, to prevent fungal disease better.
80% of pears are sprayed with 50% carbendazim powder 600-800 times liquid plus fleas 1500-2000 times, to prevent pear scab, pear hibiscus, pear bifurcation and other pests. This period is a critical period for the prevention and treatment of pear bifurcation. Imidacloprid drugs must be added during spraying. At the same time, attention should be paid to the prevention and treatment of pear stem bees. One is to spray pyrethrum pesticides, and the other is to manually remove the harm of pear stem bee.
Peach blossoms before a spray 3000 ~ 4000 times liquid 10% imidacloprid Indomethacin. After spraying, spray once 3000 to 4000 times 10% imidacloprid or pyrethroids, add 600 to 800 times 50% carbendazim powder or 50% schisomazine 600 times and add 300 times urea to prevent and control peach aphid , leaf disease, bacterial perforation. Before and after the flowering period, it was the active period of P. rapae adults, and imidacloprid spraying should be mixed with 1500 times of pyrethroid pesticides after flowering.
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