Nuisance Prevention and Control of Pests and Diseases of Jujube Tree in Young Fruit Season in Summer

There are two main stages in the prevention and control of pests in the summer, autumn, and jujube fruit pests in the Wuzhou New Agricultural and Forestry Academy:
First, young fruit period (the time is about from late June to mid-July)
In January and July, it was the season of many kinds of pests and diseases. The main prevention and control of peach borer, red-and-white spider, chafer, blind cockroach, yellow-spotted moth, and turtle wax clam were the main diseases. Diseases mainly controlled fruit anthracnose, leaf spotted leaf disease, Rust, stem dry rot disease and late rot pulp disease.
In this period, the pests should be controlled and used in combination with insecticides and fungicides, or used interchangeably. In the type of drugs used, the combination of systemic and contact-killing insecticides and fungicides should be used or used interchangeably. The spraying should be done on the front, back, branches, and fruits of the leaves; focus on the use of drugs after the rain, use the drugs promptly after the rain, try to use rain-resistant wash, long-acting agents; follow the instructions for use of the agents strictly. To prevent phytotoxicity. According to the occurrence of pests and diseases, once every 7 to 10 days for medication, you can use the following insecticides, fungicides: enemy killing, avicinus, Aimeilao, security, instant, extinction, Kung Fu, Asil, DuPont Vaning, Diflubenzuron No. 3; Bordeaux fluid, triadimefon, anti-fugin, thiophanate-methyl, Dasheng M-45, acetaminophen, chloramphenicol, agricultural streptomycin, etc. . For example, it can spray 25% diflubenzuron No. 3 2000 ~ 2500 times, or 1.8% abamectin EC 5000 ~ 8000 times, spray 2% agricultural resistance 120 (antimycin) 200 times to prevent anthrax and so on.
2. Jujube rust frequently occurs in recent years and special attention should be paid. The control method was to use Bordeaux fluid for prevention during this period.
To pay special attention to the use of Bordeaux mixture, in the prevention and treatment of rust, Bordeaux spray can play a role in the prevention and treatment of diseases in many aspects, it is recommended to use as much as possible farmers.
Jujube farmers can prepare their own Bordeaux mixture by using high-purity dark blue massive copper sulfate (or crushed) and fresh lime. During the preparation, copper sulfate is first opened with hot water to dissolve it into a greenish-blue liquid; at the same time, lime is also used to make lime water, and the water is put into the two components in accordance with the prescribed ratio. Inside the barrel, two barrels of infusion are then taken, and the above two liquids are poured into a large bucket at the same time, and the mixture is poured while stirring to make it a sky-blue solution.
Because the specific situation of using Bordeaux liquid to prevent and treat diseases is different, there are certain differences in formulas and methods for preparing Bordeaux mixture. In addition to the above method, it can also be prepared by the following method: the ratio of copper sulfate, quicklime and water is 1:2 to 3:200-500. During preparation, quicklime and copper sulfate are placed in two non-metallic containers. They are opened with a small amount of hot water and let cool. Then 1/3 of the water is put into the milk of lime, and the other 2/3 of the water is put into the milk. Copper sulfate solution. Then, the copper sulfate solution was poured into the lime milk solution, and the mixture was poured while stirring to make the liquid blue. Bordeaux fluid traits are unstable, should be used with the distribution, storage time should not exceed 24 hours.
3. Spray pest control spray 0.2% ~ 0.3% potassium dihydrogen phosphate and other foliar fertilizer.
4, spraying plant growth regulators to prevent fruit drop, promote young fruit expansion. The middle and late Zao Feng Ling (also called Zao Feng Ling No. 2) or Zao Feng Ling No. 5 can be used. The usage is that each gram of water sprays 60 to 90 pounds of whole trees and is used twice. The interval is about one week.


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