Planting Tips

Chapter 59 What are the common leaf-eating pests of flowers?how to prevent
Leaf-eating pests generally have chewing mouthparts, which mainly eat leaves and shoots, causing leaves to be incomplete and wounds such as holes to appear.Causes defoliation, dry branches, and death of whole branches.The common ones are as follows.

(1) Prickly moth is commonly known as foreign hot pepper.There are many types and wide distribution. The common ones are yellow moth, flat moth, bright green moth, and brown-edged green moth.There are two generations of this insect in a year, and the young larvae only eat the mesophyll and the residual leaf veins, and gnaw the leaves into a net shape.After the larva grows up, it eats the leaves into notches, leaving only the main vein and petiole.Control methods: peel off the cocoons; remove the leaves with insects at the beginning, and burn them; spray 50% phoxim emulsion 1000 times liquid or 1500% dichlorvos 80 times liquid in time to kill the larvae. better.

(2) Fading moths are commonly known as bag worms and skin worms.The larvae are milky white and spin silk to make a sac, and they live in it. There are silks on the sac, which move with the wind and cause harm.The larvae overwinter in the sac, and emerge as adults after pupation in the following spring, and the eggs are laid in the sac.After the larvae hatch, they make new sacs and continue to eat leaves. The damage is the most serious in June-August.Control method: remove the insect cysts manually; spray 6 times of 8% trichlorfon or 90% malathion emulsion at the initial hatching stage of the larvae.Because the worm has a protective capsule, it is necessary to spray more liquid medicine when spraying, and the effect of spraying in the evening is better.

(3) The larvae of the leaf tortrix are harmful to the leaves. They tie leaves or several leaves together and hide in them to bite the leaves.The larvae are green, spin silk and droop when disturbed, and produce 2-3 generations a year.

Control methods: Spray with dichlorvos, trichlorfon, fenitrothion, phoxim, etc.

(4) Scarabs are commonly known as Jinkelang.It has a wide distribution and miscellaneous feeding habits. Adults bite leaves, and larvae are called grubs, which are underground pests.Common hazards to flowers and trees include verdant scarabs, oriental scarabs, apple-haired scarabs, and small blue-and-white scarabs.Control method: manual killing of adult insects.Utilize its feigned death property, artificially vibrate the branches, make it fall to the ground in feigned death, and capture it.During the harmful period, 90-1000 times liquid of 1500% crystal trichlorfon or 1000-2000 times liquid of dichlorvos can be sprayed to kill it.

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