Speaking of lepidoptera pests, most friends in the garden think of leaf-eating pests, but there is a special existence in lepidoptera pests, more drilling moth trees for harm, that is, wood beetle moths, once the actual production of the existence of wood beetle moths, garden maintenance friends can no longer be taken lightly, need to actively control and treat, in order to avoid the expansion of insect pests to make trees suffer further damage!
【1】The harm of wood beetle moth to garden seedlings:
The first larvae like to cluster and invade the wound as a pest, initially invading the subcutaneous phloem, gradually invading the sapwood, eating the lower part of the skin into pieces, and then dispersing to the heartwood part of the moth, entering the dry, and completing the larval development stage in it, and the dry is mothed into countless interconnected pores.
【2】Identification characteristics of wood beetle moth:
1. Morphological identification: The larvae of the wood beetle moth are grayish white or dark red, almost hairless, and burrow into the stem of the plant, which is seriously harmful; the life expectancy can reach 1∼3 years.
2. Hazard identification: Compared with other dried borer pests, the feces discharged by the dried moths found outside the trees are pale, granular or spherical, and most of them are harmful to wood beetle moths.
[3] Wood beetle moth activity rules:
The larvae of the wood beetle moth are active from March to October, and adults mostly appear in April and July, and can be as late as October. Because the insect has different generations, whether it is a pest period or a wintering larvae, there are larvae of various insect ages, especially the four insect states of the wood beetle moth from June to August, so it brings certain difficulties to the control work.
【4】Several kinds of wood beetle moths commonly found in actual production:
1. Coffee wood beetle moth: host to coffee, tea tree, pomegranate, pear, apple, peach, jujube, lychee poplar, hibiscus, etc. The larvae are harmful to the trunk and branches, causing yellowing and death above the site of the victim, or vulnerable to wind breakage.
1-2 generations occur in 1 year. The larvae overwinter in the infested area and turn to new stems in the spring of the following year. Pupals begin in early May and feather in late May, giving adults a 3-6 days lifespan. Spawning within 1-2 days after feathering. Hatched in late May, after hatching, the borers are drilled upwards inside the stem, and the fecal holes can be seen on the outside, and there is a habit of turning the tree into a pest.
2. Small-lined wood beetle moth: host to hawthorn, begonia, ginkgo biloba, cherry blossom, purple weed, ash, toon, pentagram maple, luan tree, etc. The larvae feed on the xylem of the branches of flowers and trees, and dozens to hundreds of heads are clustered in the moth tunnel, causing thousands of sores and holes.
A generation occurs in 2 years, with larvae overwintering in the branches and moths, and in March of the following year the larvae begin to recover. Late May to early August is the pupal stage, June to August is the adult occurrence period, the larvae like to inhabit the pest, and the larvae are pests from March to November every year.
3, elm beetle moth: the most common drilling moth of elm tree, in addition to harming locust, poplar, willow, ginkgo biloba, etc., the larvae moth in the root neck, root and branch cortex and xylem moth, the formation of irregular tunnels, in the soil layer above and below the root neck is often endangered into honeycomb, weakening the tree potential, heavy death.
Pupate begins in the forest in late April, with adults emerging from mid-May to mid-August and mid-June as the peak of larval hatching.
[5] How to correctly control the harm of wood beetle moth?
The two key periods of late spring and late summer are usually selected, and the appropriate periods for prevention and control are March-May and September-October. Because the insect state is relatively neat at this time, it is conducive to prevention and control:
1. Larval control:
(1) Spray dry control: Use the Cheng Tapping package (Cheng Tapping + Royal Moth) to spray the trunk, and the spray range is 2 meters from the ground.
(2) Root application long-term prevention and control: the use of root moths for irrigation control; the use of root absorption, trunk of the transport effect, so that the drug quickly and effectively distributed to the leaves, stems, branches, flowers, fruits and other parts of the tree, the drug is not affected by wind and rain, light decomposition. According to the test, the liquid utilization rate of the root application method is reduced by about 60-80% compared with the conventional application method.
(3) Bottle insertion prevention: the use of Wing Sail for prevention and control, 2-3 days can be effective;
2, adult pest control: the use of Guangzheng mixed with 300 pounds of water for spray control, the effective period of 50-60 days.