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What are the control methods for the Privet Hawk Moth (Clanis bilineata)?
Control methods for the Privet Hawk Moth (Clanis bilineata): 1. Use light traps to kill adult moths. 2. After larvae enter the soil or before adults emerge, dig the soil as appropriate to destroy larvae and pupae. Or spray 25% phoxim on the ground to poison the pupae in the soil. Or apply drip irrigation. Before applying the pesticide, first clear weeds, dead branches and fallen leaves from the ground. After applying the pesticide, mix the soil evenly with a hoe to improve the control effect. 3. During the larval occurrence period, spray a 500-fold dilution of Bt emulsion containing more than 100 billion spores per milliliter, or a 1000-fold dilution of 90% trichlorfon crystal.
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What are the control methods for the black-marked looper moth on black locust?
Control methods for the black-marked looper moth on black locust: 1. Use light traps to kill adult moths. 2. Protect and make use of natural enemies, such as braconid wasps. 3. During the outbreak period, spray insecticides such as 50% fenitrothion emulsifiable concentrate at 1000 to 1500 times dilution, 2.5% deltamethrin emulsifiable concentrate at 2000 to 3000 times dilution, or 90% trichlorfon crystal at 800 to 2000 times dilution.
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How to control black locust aphids? Master these methods for good results
Control methods for black locust aphids: 1. Protect natural enemies such as ladybugs, hoverflies, green lacewings and aphid parasitoid wasps. 2. Strengthen pest monitoring and forecasting. When the number of winged aphids suddenly increases and the rate of aphid-infested plants reaches 20% to 30%, spray pesticide promptly. If the ratio of ladybugs to aphids reaches 1 to 100, and the aphid population shows a declining trend, stop spraying pesticide for control and protect natural enemies. 3. During the peak outbreak period, spray 50% pirimicarb wettable powder at 1500 times dilution, 10% imidacloprid wettable powder at 1500 times dilution, or spray EB-82 aphid-killing fungus at 300 times dilution
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What are the control methods for the black locust seed moth?
Methods for controlling the black locust seed moth: 1. After leaf fall, clear away the remaining seed pods to destroy the overwintering larvae inside them. 2. During the peak occurrence period, spray 50% fenitrothion emulsifiable concentrate at a dilution of 1000 to 1500 times, or 40% dimethoate emulsifiable concentrate at 800 to 1000 times. 3. Protect and use natural enemies. 4. Before sowing, select seeds with 20% salt water, scoop out the floating insect-infested seeds and burn them.
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What are the control methods for the black locust seed chalcid?
Methods for controlling the black locust seed chalcid: 1. Strict seed quarantine; it is strictly forbidden to transport seeds carrying the pest elsewhere. 2. Strengthen the management of mother trees; when pests are found, control them with chemical agents. During the adult emergence period, fumigate with 741 dichlorvos tube-inserted smoke agent. Spray with 80% dichlorvos emulsifiable concentrate at 800 to 1000 times dilution, 40% dimethoate emulsifiable concentrate at 1000 to 1500 times dilution, or 20% fenvalerate emulsifiable concentrate at 1500 times dilution. 3. Soaking seeds in hot water (60°C) for 15 minutes can kill the larvae inside the seeds, or use 10% to 20% salt water to select seeds.
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Comprehensive Prevention and Control Methods and Techniques for Common Rhododendron Diseases
The main diseases of rhododendrons include root rot, brown spot, black spot, leaf blight, and iron deficiency chlorosis. After a rhododendron contracts root rot, its growth weakens, the leaves wilt and dry up, and water-soaked brown patches appear on the root surface; in severe cases soft rot develops, with gradual decay and peeling of the bark, and the xylem turns black. This disease occurs most easily under conditions of high temperature and high humidity. The control method is to strictly disinfect the potting soil before repotting, and to keep the soil loose and moist with good permeability, avoiding waterlogging. If an affected plant is found, promptly deal with the diseased plant and the potting soil. For treatment
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Identification and Control Methods for the Rhododendron Lace Bug
Also known as the pear lace bug and pear flower lace bug, it belongs to the order Hemiptera, family Tingidae. It is distributed throughout the country. The nymphs and adults damage potted ornamental plants such as rhododendrons, Chinese roses, camellias, banana shrubs, jasmine, wintersweet and Chinese wisteria. Damage symptoms: both adults and nymphs gather on the undersides of leaves to pierce and suck the sap, and the undersides of the damaged leaves show a black sticky substance that looks very much like splattered dirt. This feature makes it easy to distinguish from other sap-sucking pests. The entire underside of the damaged leaf turns rusty yellow, while the upper surface develops many pale spots; when the damage is severe, the spots merge into patches, so that the whole leaf loses its green color and looks pale from a distance.
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Occurrence and Control Methods of Brown Spot Disease in Rhododendrons
Brown spot disease is a common leaf spot disease of rhododendrons. It occurs fairly commonly throughout the country, and is especially severe in Guangzhou, Suzhou, Nanjing, Lianyungang, Wuhan, Hefei, Shenyang and other places. Besides harming rhododendrons, this disease also harms other plants of the genus Rhododendron. Symptom characteristics: Brown spot disease mainly occurs on the leaves. Initially, small reddish-brown spots appear on the leaf surface. They then gradually expand into nearly circular lesions, or polygonal lesions due to restriction by the leaf veins. The lesions are 2-5 mm in diameter and dark brown; in the later stage, the center of the lesion turns yellowish-white to grayish-white, with a dark brown edge (varying by variety).
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Control Methods for the Azalea Spider Mite
Distribution and damage: it has occurred in Japan, South Korea, the United States and other countries. It damages azaleas, camellias, tea plants and others. Morphological features: female mite: reddish-brown, body length about 0.14 mm. Male mite: body length about 0.33 mm. This mite damages azaleas mostly from May to July and from October to December, when the damage is severe; it can suck sap on both the upper and lower surfaces of leaves, and in severe cases the leaves lose their green color and turn yellow-green.
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Identification and Control Methods of Rhododendron Flower Rot
Symptoms Rhododendron flower rot only harms the flowers, causing the flowering period to shorten, flowers to droop, and early withering and dropping. After the petals are infected, the diseased parts lose their luster, become water-soaked, soft and discolored, and finally turn brown, rot and blacken; when humid, a gray mold layer grows on the surface, affecting ornamental value. Pathogen and disease pattern This disease is caused by a fungus of the class Hyphomycetes, subphylum Deuteromycotina. The pathogen forms sclerotia on rotten flowers, and the sclerotia fall into the soil with the spent flowers to overwinter. In the flowering period of the following year, conidia are produced, spread by wind and rain or air currents, and when the flowers sprout
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