7-8 months seedling pest control, look at this article is enough 1, Japanese new sponge bug 2, national locust petiole moth 3, ash cotton mealy mite 4, national locust inchworm 5, white ash narrow gidding 6, silk cotton venus inchworm 7, psyllid 8, thorn moth 9, spotted wax cicada 10, reticulated bug 11, Chinese bare horned tianniu 12, pest mite 13, small green leafhopper 14, pear leaf spotted moth (alias black star caterpillar) 15, pear small heartworm 16, American white moth 17, leaf beetle 18, Ailanth gou orbital elephant 19, bare-shouldered star celestial cow 20, small line horned wood beetle moth 14, pear leaf spot moth 16, American white moth 17, leaf beetle 18, Ailanth Gou orbital elephant 19, bare-shouldered star celestial cow 20, small line horned wood beetle moth

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Summer temperature is high, strong sunshine and rain, which is the high incidence of various pests. In recent years, the pests in July and August have shown the following characteristics as a whole: the occurrence of leaf-eating pests has gradually increased, the harm of pest mites has gradually increased, the harm of aphids has decreased, and the dried moth pests have entered a peak. The following small series lists some of the more serious pests and their control methods for your reference!

<h1>1. Japanese new sponge borer</h1>

Host plants: harmful mulberry trees, locust trees, acacia, maple incense, elm, park, chongyang wood, etc.

Occurrence: Early June is the peak of egg hatching, and several species of hatching nymphs are roosting in the branches and leaves, and the 2nd instar nymphs are transferred to the branches for fixed feeding.

Prevention and control measures:

(1) Pay attention to the ventilation and light transmission of the tree body, and protect natural enemies such as the new sponge bee and the red-spotted lip ladybird;

(2) Spray thiazide, spirospirene ethyl ester and other agents for prevention and control.

<h1>2. The petiole moth of the national locust</h1>

Host plants: National locust, dragon claw locust.

Occurrence: Early July is the peak period of feathering of the first generation of adult insects, and the petiole moth of the national locust has caused more serious harm to the national locust, causing a large number of leaves.

(1) Check the trap trap effect in time, replace the core and sticky shellac;

(2) The trunk is injected with strong systemic agents such as imidacloprid.

<h1>3. Ash sponge powdery beetle</h1>

Host plants: harmful ash, water wax, persimmon, elm, walnut, ailanthus, plane tree, compound maple and other plants.

Occurrence: In June, nymphs are fixed on both sides of the leaf veins on the back of the leaf to feed more than summer.

Cut off the branches of the insects and protect natural enemies such as ladybirds and wasps.

<h1>4. Acacia inchworm</h1>

Occurrence: In late June and early July, the second generation of larvae entered the elderly larval infestation period, and in late July, the second generation of adults entered the feathering period.

(1) Black light or sex trap trap to trap adult insects;

(2) In the early larval stage, 20% insecticidal urea suspension can be sprayed with 1000-3000 times liquid, and in the later stage, 1.2% nicotinic and matrine 1000-2000 times liquid or 2.5% high-efficiency cypermethrin 2500 times liquid and 0.5% metamidoamic avermectin benzoate water dispersion 5000 times liquid can be sprayed.

<h1>5. White ash narrow gidding</h1>

Host plants: ash, ash willow.

Occurrence: Adults have begun to feather in late April, reach the peak of feathering in mid-to-late May, adult feather holes are "D", and larvae begin to hatch in late June, gradually mothing into the phloem and shallow xylem hazards.

(1) Strengthening phytosanitary measures;

(2) Protect and utilize natural enemies such as stalk-bellied cocoon bees and swollen-legged bees;

(3) Artificial capture of adult insects using barrier nets;

(4) During the feathering stage of adult insects, high-efficiency cypermethrin, hypertonic phenoxyvir and other agents are sprayed to seal the trunk, and the trunk is injected with strong systemic agents such as thiamethiazide and imidacloprid to control the larvae.

<h1>6. Silk cotton wood Venus inchworm</h1>

Host plant: silk cottonwood.

Occurrence: In early July, the second generation of larval harm began to enter the second generation of larval harm, and in severe cases, the leaves of various plants such as silk cotton wood, guard spear, and large-leaf boxwood could be eaten.

Adult insects can be trapped by black light lamps; 20% insecticide urea 6000-8000 times liquid can be sprayed in the early larval stage, and 2.5% high-performance cyfcfluthrin emulsion 2000 times liquid or 1.2% nicotinine emulsion can be sprayed 1000 times for control in the advanced larval stage.

<h1>7. Wood lice</h1>

Host plants: yellow oak, green tree, locust tree, small leaf pu, mulberry tree, etc

Occurrence: In July, the pests of wood lice such as yellow chestnut lice, green tree cracked wood lice, locust bean lice and other wood lice were still relatively serious, and the leaves appeared to shrink, change color, and induce coal pollution disease.

(1) Protect and utilize natural enemy insects such as ladybirds;

(2) Release of ladybird egg cards;

(3) 20% imidacloprid solution can be sprayed 2500-4000 times for prevention and control.

<h1>8. Thorn moths</h1>

Host plants: edible miscellaneous, can endanger begonias, poplars, willows, elms, locusts, moonflowers, pears, peaches, plums, apricots, hawthorns and other more than 100 kinds of plants.

Occurrence: In late June, the larvae of the yellow thorn moth, the green thorn moth and other thorn moths hatched one after another, and July was the larval harm period, and the affected leaves showed a mesh, lack of carving or holes.

(1) Black light booby-trap in the adult stage;

(2) Removal of bandworm leaves at the young larval stage;

(3) When the larvae occur seriously, spray 1.2% niacin alkali emulsion 1000 times liquid, 25% hypertonic phenoxyvir wettable powder 300 times, Bt emulsion 600 times liquid, etc.

<h1>9. Spotted wax cicada</h1>

Host plants: Thousand-headed Tsubaki, Ailanthus, Poplar, Willow, Peach, Apricot, Mongolian Oak, Ground Brocade and other plants.

Occurrence: At the end of June, it enters the adult feathering period, and in July, it enters the adult insect hazard period, which seriously endangers Ailanthus tree, ground brocade, grapes, etc., and secretions can induce coal pollution disease.

Spray 20% imidacloprid emulsion 2500 times liquid or 5% metamido avermectin benzoate water dispersion 5000 times liquid.

<h1>10. Reticulate bugs</h1>

Host plants: plane, begonia, willow.

Occurrence: In early July, the second generation of nymphs hatched, and the damage will be more serious, the damage will be more serious, the damaged leaves will be pale on the front, and the growth and landscape of the rust-stained plants on the back will be greatly affected.

(1) Spray 10% imidacloprid 2000 times liquid;

(2) Protect natural enemies such as grasshoppers and ladybirds.

<h1>11. Chinese naked horned tianniu</h1>

Host plants: willow, poplar, begonia, mulberry, elm, etc.

Occurrence: Adults begin to appear in late June, and in July it is the peak of feathering, when adults bite outward round or oval feathering holes. Adults like to harm in weakened old trees.

(1) Artificially capture adults at night by taking advantage of the phototropism of adults and their habits of nocturnal activities;

(2) Enhance the tree posture and remove weak branches, dead branches, insect-infested branches, etc. in time.

<h1>12. Pest mites</h1>

Host plants: spruce, juniper, cypress, cedar, side cypress, large-leaved boxwood, national locust, willow, poplar, hawthorn, begonia, purple leaf plum, apricot, peach, moon, bamboo, etc.

What happened: July was a critical time for red spider control. High temperature and dryness are conducive to the growth, development and reproduction of red spiders, causing the leaves to lose green and discoloration, and causing serious damage to the appearance of leaf fall.

(1) Release predator mites;

(2) Spray triazoltin, thiamethone, avyne alkyne mite 1500 times liquid and other agents for prevention and treatment.

<h1>13. Small green leafhopper</h1>

Host plants: peach, plum, plum, apricot, grape, moon, lawn grass and other serious damage.

Occurrence: In July, during its peak harm period, adults and nymphs suck sap or roost in the back of the leaf, and faded green spots appear in the affected parts of the leaves, affecting plant growth and landscape. Adult insects are good at jumping, and after being frightened, they jump and bounce, which can spread by wind and have strong transfer ability.

(1) Hanging yellow plates to booby traps;

(2) If the nymph is in its prime, spray 10% imidacloprid 2500 times the solution.

<h1>14. Pear leaf spotted moth (alias black star caterpillar</h1>).

Host plants: pears, apples, begonias, peaches, apricots, etc.

Occurrence: Adult insects feather from late June to early July, larvae infestation in mid-July, initial cluster feeding on the back of the leaves, slightly larger, scattered leaf curls for feeding.

At the young larval stage, 20% insecticide urea 6000-8000 times liquid can be sprayed, and the advanced larval stage can be sprayed with 2.5% high-efficiency cypermethrin emulsion 2000 times liquid or 1.2% nicotinic emulsion 1000 times for control.

<h1>15, pear small heartworm</h1>

Host plants: peach, plum, plum, apricot, begonia, cherry, hawthorn, etc.

Occurrence: Adults feather in mid-July, peak in late July to early August, the larvae moth from the base of the petiole in the upper part of the new shoot into the marrow, downward moth to xylem, the tips of the leaves and branches are wilted and droopy, and the larvae have a diversion hazard habit. Larvae can also harm the fruit.

(1) Adult stage: use black light, sexual attractants or sweet and sour solution to induce adult insects;

(2) The early, peak and final stages of the adult egg laying period are released once a red-eyed wasp;

(3) Trim the insect shoots in time before they are transferred into the new shoots.

<h1>16. American white moth</h1>

Host plants: Maple tree, ash, mulberry, Ailanthus tree, Thousand-headed Tsubaki, Elm, Willow, Hawthorn, Begonia, Cherry Blossom, Apple, Plum, Alder, Garuda, Poplar and other 94 species of plants.

Occurrence: In late June and early July, the adult adultSerth of the American white moth feathered in large quantities, the larvae began to be harmful in mid-july, and the second-generation larvae entered the old age and pupate stage in late July.

(1) Timely cutting of the mesh curtain and destruction, young larvae can be sprayed with 20% insecticidal urea suspension 1000-3000 times liquid, and later sprayed 1.2% nicotine ・ matrine 1000-2000 times liquid or 2.5% high-efficiency cypermethrin 2500 times liquid, 0.5% methamidoaminomersbal benzoate water dispersion 5000 times liquid control;

(2) In late July, the old mature larvae stage and the primary pupal stage released the Wasp of Zhou's wasp for biological control. When releasing bees, it is best to release them in two parts, the first time at the beginning of the mature larvae, and the second time at an interval of 7-10 days, choosing to release on sunny days.

Precautions: Avoid spraying insecticides within 1 week before and after the release of Cynthorella wasps to prevent affecting the survival of parasitic wasps.

<h1>17. Leaf nails</h1>

Host plants: elm, weeping willow, dry willow, ground brocade, grape, peony, peony, etc.

Occurrence: Severe in July, adult larvae are visible, young larvae cause the leaves to be mesh-shaped, and the leaves can be eaten into holes after 2 years. Common species are elm green hairy fluorescent leaf beetle, elm yellow hair fluorescent leaf beetle, willow round leaf beetle, ten star scoop firefly leaf beetle and so on.

Spray 1.2% nicotinine 1000 times liquid, 10% imidacloprid 2000 times liquid or 3% hypertonic phenoxyvir emulsion 3000 times liquid, etc.

<h1>18. Ailanthus orbital elephant</h1>

Host plants: Ailanthus elegans, Pinus elegans.

Hazards: Adults begin to feather in late June, and in July it is the peak of feathering, adults feed on young shoots, leaves, petioles to supplement nutrition, and adults lay eggs on tree trunks. The worm is often mixed with the groove orbital elephant.

(1) Adult insects can be artificially captured by using the pseudo-death nature of adult insects and mostly moving on tree trunks;

(2) In the adult stage, the adult stage can spray 200 times the green Weere liquid for control;

(3) Soil buried imidacloprid and other systemic agents.

<h1>19, bare-shouldered star Tianniu</h1>

Host plants: willow tree, maple tree, yuanbao maple, five-pointed maple, elm tree, etc.

Occurrence: June is the peak period for adult feathering, and in early July there will still be partial adult feathering, and in mid-july the larvae begin to hatch for moths.

(1) Artificial capture by using adult feathering to fly out of the tree to supplement nutrients;

(2) Adult insects can be artificially touched to kill the eggs in the egg laying groove after 2-3 days of feathering and supplementation;

(3) Release of flower-based parasitic adults or flower-based beetle-based egg cards;

(4) Trunk and canopy spraying green Willet, high efficiency cypermethrin microcapsules suspension, etc. for prevention and control;

(5) Inject 10% imidacloprid liquid agent at the base of the trunk according to 0.8 ml/cm (chest diameter);

(6) Soil burial medicine. Specific methods: If 75% imidacloprid is used, first follow 75% imidacloprid: water = 1:60, and then according to the diameter of the tree, dig a trench 10 cm deep at 20-40 cm from the base of the tree, 30 ml of liquid per cm chest diameter, and then fill in the ditch.

<h1>20. Small-lined wood beetle moth</h1>

Host plants: willow, poplar, elm, lilac, ash, acacia, ginkgo biloba, maple tree, etc.

Occurrence: The small-lined wood beetle moth is seriously harmful in ash and willow trees. In July, some adult insects continue to feather, and in mid-July, new moths appear to be infested, and in this period, artificial injection can be used to control larvae and dig up and treat newly hatched larvae, and the injection agents are selected from imidacloprid, methyl vitamin salt and other well-absorbing agents, and adult insects are trapped with black light lamps and sex traps.

(1) Inject pathogenic nematodes from the worm hole on rainy days;

(2) Trunk injection or soil burial medicine (such as systemic agents such as imidacloprid) to control larvae;

(3) Use black light or sexual attractants to trap adult insects.