After fruit picking, it is a critical period for the prevention and control of cherry diseases and pests. If it is not well controlled, it will cause a large number of deciduous cherries, poor growth, debilitating tree vigor and affecting flower bud differentiation, resulting in a decrease in yield and quality in the second year. This must be taken seriously. We can adopt the strategy of "preserving leaves and treating both diseases and pests." The following prevention and control opinions can be referred to:
1, drug control 2-3 times. After the fruit is harvested, the first drug is sprayed immediately at the beginning of July, and then the follow-up prevention and control work can be performed with the characteristics of visible leaf surface pests and control agents. It is recommended to spray once again at the beginning of August, and September is the peak of the mulberry seedling hatching. During this period, the mulberry whitefish hatched for a long time. Therefore, the prevention and control of mulberry white wolfberry should be focused on in September.
Control agent:
(1) Available multiple doses of Bordeaux (1:2:160-200) single agent spray.
(2) Choose 70% thiophanate-methyl 600-fold or 50% carbendazim 500-fold bactericide and add 2,000% cypermethrin or 25% diflubenzuron and other insecticide mixed spray at 2000 times.
(3) The occurrence of leafhopper orchard can be sprayed with a 1.8% abamectin or 20% anthraquinone and other acaricides.
(4) The orchard with mulberry white pods can be sprayed with 48% of Lancet at 1000-1200 times spray during the active period of each generation of larvae.
2, alternating use of pesticides. To avoid or delay the development of resistance, the Bordeaux mixture should be used interchangeably with other agents. In addition, other suitable agents may be used to replace the insecticides or fungicides in the above formulations in order to achieve alternate medication purposes.
3, when spraying should take into account the branches and leaves and the opposite. Do it evenly, carefully, and thoughtfully. To improve the effect of governance.
The occurrence and development of cherry pests and diseases are greatly affected by climate and prevention and control. In addition, the pests and diseases of different gardens are not the same. Therefore, self-examination and self-government work should be carried out separately. Especially in the rainy season, we must strengthen the prevention and treatment of leaf diseases and increase the number of spraying control, and at the same time we must use some rain-resistant agents.
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