The best way to control red spiders is still drug control, with avermectin, pyridoxine, biphenylhydrazine ester these three drugs are enough to protect crops for one year. These three drugs are more common, but also relatively easy to buy, the price is also relatively cheap, it is recommended that you use this method when using.
Red spiders hatch from March, if this time is not controlled, the later stage of reproduction is relatively fast, so in March, use avermectin for control. When matching the drug, you can use avermectin with bacillus and peptides, or replace the peptide with other foliar fertilizers for spraying, if you need to control other pests at the same time, you can also use other water-based insecticides. The most important point is that the time of spraying must be arranged after 4 pm, when the sun begins to set, otherwise it will affect the effect of the spraying. Spraying once in early March and once at the end of March can well prevent the breeding of mites.
After entering April, it can be controlled with pyridoxine with foliar fertilizer. Spray once a month in April and May, these two months have less rain, so the number of sprays should be a little less, which is also so that crops can grow safely and healthily, prevent excessive use of drugs, avoid drugs that cause harm to crops, and also protect the soil.
In June-August, the three months of rain will be more, so the frequency of spraying should be higher, in order to protect the crop, but also to protect the soil, you can choose a slightly higher price of biphenylhydrazine ester. Also sprayed with foliar fertilizer when spraying. At this time, the spray can not be sprayed according to a fixed time, generally after a rain, wait until the soil is slightly dry and not sticky to the feet. Because the rain is not fixed in this season, sometimes it rains once in 10 days, sometimes the next rain is 10 days, and the sunny day after the rain is the time when red spiders are most likely to breed and erupt, so we must control the time to spray to prevent red spider outbreaks.