First of all, let's know all about the drugs that can prevent planthoppers.
matrine, azadirachtin, fenpropafenone (pyridaben), propafenone, triazophos, nisolone (hexythiazox), abamectin, crystal omethoate, pine alkali mixture, amitraz, acarbose (diafenthiuron), bifenazate, ethiconazole, fenpropathrin, fenbutatin, bromopropylate, spirodiclofen.
so which drug should be used to prevent strawberry planthopper?
1. Traditional drugs
abamectin, pyridaben, hexythiazox, spirodiclofen, propargite, diafenthiuron, etc. have been used for a long time, and planthoppers have already formed certain drug resistance to them, and they will also do some harm to bees.
second, a new drug
etomidate:
etomidate is a contact-killing and selective acaricide without temperature sensor and distinctive structure. There is no internal absorption, so the whole sprayer should be used, and spraying the reverse side of leaves is better.
It is safe, efficient and lasting for a long time. It can effectively prevent the resistant harmful mites caused by acaricides at present, and it has good rain washing resistance. If there is no rainstorm 2 hours after application, it is not necessary to spray it again.
at the early stage of the damage of disaster mites, spray with 3-4 times diluted water with etofenazole. It can effectively prevent all juvenile stages of mites (eggs, young mites and nymphs). The duration can reach 4-5 days. The mixed application effect with abamectin is more prominent.
Spirulina ethyl ester:
It is active against the eggs and larvae of plant hoppers, lasting for a long time, and selective to bees. It can bring efficient prevention for nearly 8 weeks.
bifenazate:
bifenazate is a new type of acaricide for selective leaf sprayer. It is reasonable for every link of daily life of mites, has ovicidal activity and knock-down activity for adult mites (48 ~ 72 hours), and has a long duration and low risk for predatory mites.
fenpropathrin:
It has activity on every pregnant stage of planthopper, especially on young mites, and it is quick-acting. According to the experimental comparison, the actual effect of buflomedil at all levels is better than that of spirodiclofen and abamectin.
ethofenapyr:
ethofenapyr belongs to non-inhalation acaricide, and the key is to kill mites according to contact killing and stomach toxicity.
It can kill eggs and mites simultaneously, and it is highly efficient to synthesize mites from eggs, young mites and nymphs full of insects. Long lasting time, which can reasonably reduce the frequency of application of acaricide every quarter.
3% etofenapyr granules, 3 ~ 6 times, have excellent practical effect in preventing plant hoppers, and are expected to be used as alternative acaricides.
fenpyroximate:
fenpyroximate has good contact toxicity and stomach toxicity, which is reasonable for every characteristic of harmful mites, including eggs, nymphs and adults, and has good quick-acting effect, lasting for more than 3 days.
4,-fold spray can be used to prevent plant hoppers in citrus trees, apricot trees and vegetables and fruits, and 4,-fold spray mixed with diafenthiuron can be used in areas with serious resistance.
3. Mixed drug
Avermectin+pyridaben;
spirotetramat+avermectin;
bifenazate+spirodiclofen;
bifenazate+etofenazole;
ethiconazole+avermectin;
43% bifenazate 2 times+snail ethyl ester 15 times had excellent control effect;
A 4-fold sprayer mixed with diafenthiuron can be used in areas with serious resistance.
IV. Frequently asked questions
1. It is strongly recommended that the dosage of propargite should not be used for strawberry seedlings, and the fertilizer damage is serious.
2. Triazoltin and phenylbutatin are prone to fertilizer damage;
3. Matrine, anisodine, etc., if they are pure (without hidden components), generally have weak actual effect and are more prone to drug resistance;
Final hint: As fresh fruit, strawberry seedlings must pay attention to the safety observation period of chemical fertilizer.