Fern Rhizome,Rhizome Plants,Ginger Rhizome,Roots And Rhizomes Henan Qiancuntang medicial technology co.ltd. , https://www.qctchineseherb.com
Winter greenhouse vegetable pesticides "five not suitable"
The application of pesticides should be scientific, especially the application of pesticides in winter greenhouse vegetables. Otherwise, it will not only fail to achieve control effect, but also be prone to phytotoxicity. Therefore, the application of pesticides should pay attention to five not. First, it is not appropriate to use live water to formulate pesticides: Because there are many impurities in the living water, it is easy to plug the sprayer's nozzle with its dispensing, and it also destroys the suspension of the liquid and precipitates. Second, it should not be arbitrarily increased the amount of water: excessive water will reduce the concentration of pesticides. Spraying on the crop leaves only a very small amount of pesticides, which is not enough to kill the pests, and some pesticides even completely fail. Excessive water addition can also result in the loss of pesticides and environmental pollution. Therefore, when formulating pesticides, the amount of water added must be strictly controlled according to their use concentration range. Third, should not arbitrarily increase the amount of pesticides: pesticides in the approved production and sales, have to undergo a rigorous field efficacy trials, and then determine the amount of medication, medication time, number of applications and other actual use data. Therefore, in accordance with the dosage specified in the instructions for use, that can achieve control effect, and increase the amount of drugs not only increase the input, but also make crops produce phytotoxicity, increase pesticide residues in agricultural products, increase environmental pollution. Fourth, it is not appropriate to spray pesticides during the flowering period: when the crops bloom, their tissues are young, their stress resistance is weak, and they are prone to phytotoxicity, so they must avoid flowering during spraying. 5. It is not advisable to spray pesticides before harvesting: Generally, the period of highly toxic highly toxic pesticide residues is about 60 days, and the period of high-efficiency and low-toxicity pesticide residues is about 15 days. Therefore, the use of pesticides should be forbidden before vegetable harvesting to avoid food poisoning.