The last dose before apple picking is important! Can you sell it at a good price?
2020-08-16 13:13:15
In the production of apples, drug management is a weak link. On the one hand, new pesticides emerge in an endless stream, new pesticide varieties are changing with each passing day, and farmers have a process of understanding and application. On the other hand, pesticide manufacturing enterprises vary in size, and the quality of the products produced is different. Management level is a major part of Apple's production. According to the production experience, the following points should be noted when using drugs in apple production:
1. Less or no resistant pesticides should be used in production.
Due to the long-term application of pesticides, the resistance of pests and diseases to drugs is increased, the lethality is limited, and some may even cause a large number of pests and diseases. For example, aphids, mites on grape pesticides, dimethoate, omethoate, spotted leaf disease have resistance to methyl thiophanate and carbendazim, and the control effect is little or invalid after spraying.
Second, pay attention to the correct use of traditional bactericidal drugs.
Stone sulphur mixture and Bordeaux mixture are long-term use in production and good control effect. After long-term production practice, the correct application of the pest control effect is ideal, so it can be retained for long-term use, but the use should be noted: stone sulphur mixture in should be used with the preparation with the application, not long after the preparation will reduce the efficacy, to application-based dormancy in apple production, flowering improper use can cause fruit drop, fruit surface contamination;
Stone sulphur mixture can not be mixed with organophosphorus pesticides and other alkaline pesticides. Otherwise, the mixture of acid and alkali will reduce the efficacy or failure, and the control effect will not be achieved. The stone sulphur mixture should not be mixed with the same alkaline Bordeaux mixture. The combination of the two will cause chemical reaction, reduce the efficacy and cause phytotoxicity. The interval between the two should be more than 20 days;
Bordeaux liquid can not be mixed with stone sulphur mixture, organic arsenic bactericide, organic sulfur bactericide, organic phosphorus bactericide. Since apple is not sensitive to copper ions and lime, it can be used in multiple or multi-type ratio; Apple fruit is sensitive to copper ions within a month, and it is easy to produce fruit rust and crack after application, which affects the appearance of the fruit, so it can not be applied during the young fruit period.
Third, we must pay attention to the reasonable mix of pesticides to reduce labor and improve control.
Mixing a variety of pesticides, saving labor and preventing the occurrence of drug resistance. When mixing, it should be noted that those who fail after mixing can not be used; those with enhanced toxicity after mixing can not be used. Should be used with the mix. Generally, the acaricide and the insecticide can be used in combination; the systemic agent and the contact agent can be used in combination; the fungicide and the insecticide can be used in combination.
Fourth, we must strictly control the time of the last medication.
The last dose determines the amount of pesticide residues in the fruit, which has a great influence on the quality. The last administration time should be strictly controlled. The last dose should be sprayed 20 days before use to ensure that there is no residue or a small amount of residue in the fruit. .
Total 1 | <First <Prev 1 Next> Last> |
share to:
Npk Fertilizer,High Tower Npk,Npk Compound Fertilizer,Nitrated Based Npk Fertilizer
SHANXI HUAXIN FERTILIZER CORP. , https://www.sxhuaxingroup.com