Peach tree planting technology In early to mid-March, the peach producing areas of Jiangsu Province (open field peach) will fully enter the peach bud germination period, and the overwintering diseases and insects will also enter the recovery period, migrating from the overwintering place to the host and starting a new reproduction cycle. 
At this time, it is necessary to seize the critical period of peach tree pest control before and after germination, dew red, and flowering, and strengthen the observation and timely use of drugs for aphids, pear heartworms, leaf miners, leaf mites, mulberry white scales, green blind bugs, etc., which are harmful to peach bud germination or flowering sting. Bacterial perforation, branch blight, leaf shrinkage, powdery mildew and other diseases should be prevented in advance.
The pruning of the peach orchard has not yet been completed, and the pruning work must be completed in early March. Combined with pruning, clean up the waste bags, diseased fruits, diseased and insect branches and dead branches remaining on the tree, scrape off the diseased spots and old warped bark in the peach orchard with conditions, and thoroughly clean up the fallen leaves on the tree and under the tree. After spraying, the waste is buried or burned to reduce the number of pathogens.
The peach orchard that has been pruned is in the budding to peach blossom dew red period, when the weather is fine and the maximum daily temperature reaches 15 °C, the whole garden is sprayed with Baumé 3 5 degrees stone sulfur mixture or 45 crystal stone sulfur mixture 50 times, or use engine oil emulsion to prevent and control overwintering fungus, aphids, scale insects, hawthorn leaf mites and other pests. When spraying, the amount of water should be sufficient, so as to ensure that the ground and ground are fully covered, and the trunk and branches should be sprayed evenly, especially the contact parts between buds and branches.
The size of flower buds and bells is the best period for pesticides to control aphids, and other major pests that need to be prevented at the same time are pear heartworms, scale insects, green blind bugs, etc.; Diseases include bacterial perforation, leaf shrinkage, brown rot, scab, etc., and suitable agents can be selected according to the occurrence of diseases and insects in Taoyuan.
At present, the best agents for the control of aphids are spirometallethyl ester, halodioxapyr, halodicarfeniliprole, pymetrozine, thiamethoxam, dipropionate, etc.
It is recommended to use 22% sulfoxapyr 3000 times + 35% imidacloprid 1000 times solution for aphid control before flowering. The agents for the control of lepidopteran pests include emamectin benzoate, avermectin, cyhalothrin, chlorantraniliprole, etc., and it is recommended to use emamectin lice mite urine or emamectin perchloride before flowering. The agents for the prevention and treatment of fungal diseases include prochloraz, pyraclostrobin, propiconazole, difenoconazole, etc., and difenoconazole is recommended before flowering. The pesticides used to prevent and control bacterial diseases mainly include chlorobromoisocyanuric acid, thiamethoxone, uninomicin, mesomycin, quinoline copper, octrinamine, etc.
When spraying, the dilution concentration is configured according to the effective content of the pesticide and used alternately. At the same time, you can add 02%-0.3% borax and 14 hydroxybrassinin or Bihu can not only promote the germination and elongation of pollen tubes, but also promote the transportation of sugar in the tree, enhance the cold resistance and stress resistance of the tree, and improve the fruit setting rate.
Before the overwintering adults of the pear heartworm emerge (it is recommended to sting before March 20), apply the pear heartworm disorienting paste (or hanging the tape) on the trunk of the pear heartworm to interfere with the mating of the overwintering pear heartworm, reduce the reproductive base, and achieve the purpose of prevention and control. At the same time, biological control can also be carried out through artificial migration of heterochromatic ladybugs, predatory mites, and placement of sweet and sour liquid.
About 80% of the flowers in the whole garden can be sprayed with 5% pyraclostrobin EC 2000 times + 3% Zhongshengmycin wettable powder 500 times + 22% spirometrian ethyl ester 4000-5000 times liquid + 50% pyridazone 1500 times + 98% emamectin salt lice mite urea 20,000 times solution, comprehensive prevention and control of brown rot, bacterial perforation, scab and other diseases, aphids, pear heartworms, leaf moths, bugs and other pests.
Medication precautions
1) Use the drug when the flower is red, and stop the drug at the early flowering stage to prevent damage to the stigma and affect pollination.
2) Spraying should be thorough to ensure that the plant is in full contact with the agent; It is recommended to spray the first garden cleaning agent in early spring, such as stone sulfur mixture, together with the ground.
3) Do double dilution of pesticides, pay attention to weather conditions when using medicine, and spray pesticides after the dew dries in the morning or after 4 o'clock in the afternoon.