Understand Orchid Medicine (II. Cuibei)

When the temperature changes from low to high, the humidity also increases, and the fungi that harm the orchid leaves begin to become active. Often at the same time harm orchid leaves more than one kind of fungus, but the severity of harm and discovery sooner or later different. When all kinds of harmful bacteria harm orchid leaves or occur at the same time or successively, people are often exhausted and lost.

The commonly used drugs for controlling foliar fungus damage have been used for a long time, and harmful fungi gradually produce antibodies to such drugs, so they have to increase the concentration of drugs and the frequency of application to achieve the purpose of eliminating harmful bacteria. Harmful bacteria are eliminated or temporarily controlled by you, but at this time bluegrass is under great toxic pressure and affects normal growth.

In the prevention and control of orchid leaf bacteria damage, far away used a green environmental pollution-free biological fungicide-Cuibei. The effective ingredients, functions and characteristics, control objects, methods of use, precautions and other information of Cuibei are introduced as follows:

Active Ingredients: Cuibei is synthesized according to strobilurin, a metabolite of Armillaria mellea on larch cones. The chemical structure of this active ingredient was discovered in 1978. In 1983, it entered the laboratory of BASF Company in Germany and developed and synthesized the active ingredient of Cuibei-kresoxystrobin.

Function and characteristics: Cuibei is a bionic fungicide extracted from natural substances with protective, therapeutic and radical effects. It has a new mechanism of action and can be used as a new effective tool for comprehensive disease management and resistance management. Pharmacological action on cytochrome complexes, blocking the respiratory chain of bacteria mitochondria electron transfer process. The mode of action is completely different from other known fungicides. It has protective activity and is used as a therapeutic agent and eradication agent. Inhibition of spore invasion is the most important link to prevent disease occurrence.

Control object: Cuibei can control powdery mildew, anthracnose, black spot, rust, stem blight, leaf spot, black spot, ring disease, leaf spot, stem blight and gray mold and early blight of plants on melons, beans, fruits, leafy vegetables, flowers, traditional Chinese medicine, food crops, etc., and also has good control effect on some lower fungi such as downy mildew and blight. After spraying, the active ingredients are absorbed by the waxy epidermis of crop leaves and fruits, which can resist rain erosion because of its deposition effect. Active ingredients are released slowly in the form of diffusion and have a long shelf life. The agent has layer migration and foliar penetration. If only one side is coated, the active ingredient can penetrate the leaf. After a few hours, the untreated leaf surface is also effective.

Application method: Cuibei is an organic fungicide with a new mode of action and no cross resistance with conventional pesticides; spraying interval is 10~14 days, almost no residue after the safety interval; safe to natural enemies, suitable for integrated pest management, in line with EPA standards;40 mm rainfall has almost no effect on efficacy; its effective ingredients are lipophilic substances, which can be released in a long time. Cuibei commonly used dosage form is 50% dry suspension, specific use method: used as a protective agent every 10~14 days spray once, used as a therapeutic agent every 7~10 days spray once, conventional spray, use in vegetables diluted 3000~4000 times liquid, fruit trees diluted 5000~7000 times liquid spray, it is recommended to spray 2500~3500 times liquid on blue leaves.

Note: Cuibei control effect is not affected by temperature under normal conditions, and can be used in various growth stages of crops and orchids. It can be used on wet leaves and mixed with other insecticides, fungicides, acaricides, plant growth regulators and foliar fertilizers. Advocate rotation and mixing, do not use together, the number of times per year should be controlled within 3 to 5 times. Cuibei has low toxicity to bees, beneficial mites, earthworms and other beneficial organisms, and is relatively safe to the environment.

After using Cuibei far away, I feel that it has some effect in controlling leaf blight and head scorch on orchid leaves, but I should pay attention to rotation and not common use. (Gao Haiyong)