Aihua Plant Protection Original
In autumn, when the red spiders are at their peak, they give the harm to the planting, everyone feels the same, so they will not expand to say. Let's talk about the question that everyone is very concerned about: Why does the acaricide have no effect when it is used several times? Resistance, of course. But what is resistance? Resistance is the process of pest adaptation to the environment, the nervous system produces enzymes that degrade pesticides, so that pesticide decomposition loses lethality. Therefore, growers will use less resistant acaricides.
At the same time, it kills eggs, young mites, mites, and adult mites
First, what acaricides have not yet seen cross-resistance
1. According to the investigation, the resistance of citrus red spider to ethanazole has increased by about 75 times, and the resistance to spirant ester has increased by about 150 times. Therefore, the growers who have long used the above-mentioned acaricides cannot carve a boat and ask for a sword, pinning their hopes on their former glory.
2. Determination (biphenylhydrazide) at the same time for killing eggs, young mites, mites, adult mites, 36-48 hours to see mite deaths; because of market positioning and other reasons, there is no interactive resistance with other acaricides; general acaricides either kill eggs, or kill adult insects, can be targeted at the same time for mites in various active periods, it is rare. Moreover, the persistence of decisions is long.
3. Decisively inhibit the conduction system of mites, make it dysfunctional, and it is not easy to produce enzymes that degrade pesticides, so it is rare to see interaction resistance with other acaricides. It is also different from ordinary acaricides: it is not affected by light and heat, and it is resistant to rain and rain - it can quickly reduce the base of red spiders and protect crops. Commendably, it is friendly to beneficial insects and predators, and valuable to orchards and strawberry bases that require bees to pollinate.
Second, decide the main points of use of biphenylhydrazine esters
1. The eggs of red spiders are mostly produced on both sides of the main vein of the leaf back, branches and forks, bark gaps, etc., which can be magnified and observed with the help of mobile phone photos, when 1-2 mites appear in the leaves, it is a clear spray signal. September to October is the second peak of its pest, timely medication, can concentrate on the elimination of female adults who are ready to overwinter after fertilization, so that the insect population base in the next year is sharply reduced, and the top is hit several times at a time.
2. Orchard weeds and diseased insect branches are also shelters for mites to overwinter, and can be paid attention to when using medicine or clearing gardens. After decisive spraying on the leaves of the crop, it is resistant to rain erosion, and the rain after 6 hours does not affect the normal performance of the drug effect.
3. Decide that biphenylhydrazine ester has no systemicity, and the liquid is required to be sprayed evenly when using the drug, especially on both sides of the main vein of the leaf back, the branches are forked, the bark gap, the inner chamber of the fruit tree, etc., so that the egg will die in contact with the liquid. Otherwise, the red spider is prone to resurgence.
Personal opinion, for reference