What about mint leaf worms?
At the mention of peppermint, many people must know that it not only tastes good, but also tastes good. It can be eaten cold, boiled soup, soaked in water, and placed in the home to decorate the environment, so many people like to raise a pot at home, but during the breeding period, there will be all kinds of insect pests, what about mint leaf insects?
1. Small land tiger
Damage symptoms: in spring, the small land tiger larvae bit off the mint plant near the ground, resulting in lack of seedlings and broken seedlings, uneven holes appeared in the lower leaves, and the aboveground stems were eaten.
Prevention and control methods: the roots should be sprayed with 2000-3000 times of 40% chrysanthemum horse EC and chrysanthemum EC, or 1000 times of methyl isosphos.
2. Spodoptera litura
Damage symptoms: in spring, the small land tiger larvae bit off the mint plant near the ground, resulting in lack of seedlings and broken seedlings, uneven holes appeared in the lower leaves, and the aboveground stems were eaten.
Control method: spray 50% Yitaibao EC (30-60 ml per mu) or 50% fenitrothion 1000 times solution with water. Don't spray any more 20 days before harvest.
3. Spodoptera litura
Symptoms of damage: larvae eat peppermint leaves from August to October.
Control method: spray with 1000 times solution of 90% crystal trichlorfon or 1000 times solution of fenitrothion. Note: pesticide spraying should be stopped 20 days before harvest to prevent pesticide residues from affecting its quality.
4. Jumping armour
Symptoms of damage: Coleoptera Chrysomelidae insects. It often occurs in summer and autumn, when adults bite on the back of the leaves and become honeycomb after biting.
Control method: spray with 1000 times liquid of 90% crystal trichlorfon.
5. Inchworm
Damage symptoms: also known as "bridge worm", the damage period is about mid-June and late August.
Control method: per mu can be used to kill 15~20ml to water, spray 1 times twice, or with 80% dichlorvos 1000 times liquid spray.
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