Now the insect pest is still more serious there are spotted fly, planthoppers, mites, thrips, while the melon silk borer is also more powerful, this piece of our prevention and control can not relax, it should be noted that this time the temperature difference is large, the growth tissue of the crop is relatively young, the resistance to the drug is relatively poor, in the prevention and control of a certain concentration dilution, more water-based, comprehensive protection.
In addition, when consulting on how to treat thrips, Teacher Li said that when treating thrips, more sensitive crops such as melon vegetables can choose pyridine, mite urea with methyl salt for spraying, and crops with strong resistance choose drugs containing bromonitrile ingredients with methyl vitamin salt for spraying, and planthoppers are gradually decreasing with the decrease in temperature, but remind vegetable farmers and friends not to be careless when controlling in the shed.
In the early winter, in addition to the prevention and control of thrips, planthoppers, mites and other insect pests, Teacher Li Yun reminded vegetable farmers that there is another insect pest to pay special attention to.
Spotted fly likes the temperature of about 25 ° C, so in the autumn to delay this stubble and early winter stubble, colonization should also be carried out after a good prevention and control, the drug is generally used to kill fly amine plus prethroid or fly amine plus a little systemic agent pyridopherol and the like, so that it can be effectively prevented and controlled.
As the temperature difference between day and night gradually widens, the humidity in the shed will also become larger, creating favorable conditions for the occurrence of diseases, so what kinds of diseases should be prevented at this stage?
One high temperature shed now downy mildew disease up, the other is powdery mildew some sheds also began to occur, we pay attention to the spray protection of some agents, such as frost urea manganese zinc, methyl cream manganese zinc and then with oleyl morpholine for downy mildew protection, the second powdery mildew such as phenyleth methicazole, pyrazole ether ester or compound some products, can also be added containing polyglutamic acid foliar fertilizer, the overall prevention and control effect will be better.
In the early winter, the following two points should be done in the drug prevention of diseases and insect pests:
1. The concentration of the agent in pest prevention should not be too large, so as not to cause drug damage, and at the same time, according to the strength of the resistance of different crops, choose the appropriate agent.
2. Downy mildew and powdery mildew begin to have a high incidence, pay attention to prevention and control. Downy mildew can be protected by zinc manganese and zinc manganese with oleyl morpholine; powdery mildew can be protected by phenylethicazole pyrazole ether bacteriolate.