Kiwi Tsubaki Elephant
Symptoms: Tsubaki elephants are mainly a bit of bee-edged Tsubaki elephants and striped bee-edged Tsubaki elephants, and adults and nymphs sting the juices of young stems, young leaves, flowers, and pods of kiwi fruit. In the early stage of the affected leaves, irregular yellow spots or macula appear, and later some leaves become purple-brown due to malnutrition, and severe leaf parts or whole leaves dry up, with different degrees of irregular holes. The fall of the buds, flowers and fruits of the victims, resulting in a decrease in yield and quality.
Chemical control: In the flowering stage of larval and adult pests, at 9 to 10 a.m. or 4 to 5 p.m., use 10% imidacloprid wettable powder 4000 times liquid, or 5% acetamidine emulsion 3000 times liquid, or 3% avermectin emulsion 5000 times liquid, or 5% high-efficiency cypermethrin emulsion 2000 times liquid, mu medicinal solution 45 to 60 kg, stem and leaf spray control. Spray once every 5 to 7 days, spray 2 to 3 times, spray without heavy spraying or leakage.
Kiwi cucumber
Symptoms: Yellow gourd, also known as yellow firefly, has a wide range of diets and can harm 69 plants in 19 families. It harms almost all kinds of melons, the most severely affected are watermelons, pumpkins, melons, cucumbers, etc., but also harmful cruciferous, nightshade, legumes, sunflowers, citrus, peaches, pears, apples and so on. Adult and larvae can be pests. Adults prefer to eat melon leaves and petals, and can also damage the skin of pumpkin seedlings, biting off young stems and eating young fruits. After the leaves are eaten, a circular lack of carving is formed, affecting photosynthesis, and after the melon seedlings are killed, they often bring devastating disasters; the larvae eat the roots of the melon underground, and the heavy ones make the plant wilt and die, and also decay into the ground part of the melon, causing rot and losing its edible value.
The control of cucumber should first grasp the adult stage, can use the yellowing habit, with the yellow pot to induce, in order to grasp the occurrence period, timely prevention and control; control of larvae in the melon seedlings at the beginning of wilting and early application of medicine, in order to kill the larvae as soon as possible. The impact of damage at the seedling stage is greater than that of adult plants, and should be listed as a key prevention and control period.
Agricultural control and reasonable arrangement of sowing period, in order to avoid the wintering generation of adult insects as the peak period of pests, you can use the hotbed to raise seedlings, transplanting early, when the overwintering adult activities are harmful, the melon seedlings have grown, which can reduce the damage; in the spring, the melon seedlings are planted between the rows of winter crops, which can reduce the harm.
Prevent adult worms from laying mulch around the melon seedlings or spread grass and wood ash, wheat stalks, wood chips, etc., so as to prevent adult insects from laying eggs at the roots of melon seedlings and play a role in protecting melon seedlings.
Booby-trapping overwintering adults Taking advantage of the habit of overwintering in the grass piles with adults, grass piles are set up near the radish field to attract the adult insects to hide and overwinter, and the grass piles are burned in the middle of winter.
Pharmaceutical control of melon crops is sensitive to many agents, prone to drug damage, especially weak resistance at the seedling stage, and medication should be very cautious.
It can be controlled by spraying 1000-2000 times liquid of 20% mothicum emulsion or 10% cypermethrin 1000-1500 times liquid or 10% high-efficiency cypermethrin 5000 times liquid or 80% enemy feeding emulsion 1000-2000 times liquid or 90% crystalline enemy centaurethus 1500-2000 times liquid, etc., at noon spraying soil surface and field edge weeds and other pest habitats.
Adult control can also be controlled with 40% cypermethrin 4000 times liquid or 2.5% preserved emulsion 2000 times liquid.
For the control of larvae, the roots can be irrigated with 90% dichlorvos 1500 to 2000 times liquid or 50% octyl thiophos 1000 to 1500 times liquid.
Kiwi quasi-transfiguration moth
Symptoms: Distributed in Guangdong, Fujian, Zhejiang, Hubei, Sichuan, Jiangsu, Guizhou and other provinces. More than 40 species are known in China. Narrow wings. The wing surface is sparsely scaled. Joy flies during the day and rests at night. Especially on sunny days, at noon, he often moves among the flowers and eats nectar. The larvae feed on the inside of the branches. Brown feces are excreted from the borer hole, the victim expands and swells like a tumor, the leaves deteriorate, the fruit falls off, and finally the branches die.
The larvae are more common in the subcortical phloem at the bifurcation of the branches and near the wound, and moth into irregular passages, with mucus flowing out of the victim and appearing as water droplets, which later turn yellowish brown and mixed with insect feces. When feathered, the pupal shell is carried out of the hole by one-third or one-half.
Prevention and control methods:
(1) Strengthen orchard management and rational fertilization and irrigation, enhance tree potential, and improve tree resistance. Scientific pruning, pruning insect branches and dense branches, autumn branches found when the whole branch is cut off and burned, and adjust ventilation and light transmission, rainy season pay attention to orchard drainage, maintain moderate temperature and humidity, combined with pruning, clean the orchard, reduce the source of insects.
(2) Protection and utilization of natural enemies.
(3) Make good insect detection and forecasting, and spray insecticides in time. The appropriate period for control is from May to July, 500 times that of 50% of the dichlorvos can be used, and when moth holes or insect droppings are found in June and July, the larvae are stabbed to death with small wires.
Kiwi mollusks
Snails are molluscs, and snails (including another kind of Pujiang mollusk "Xuanda Plate") not only harm the young shoots and leaves of kiwifruit, but also cause lack of seedlings, which is one of the important pests in kiwifruit cultivation.
(Pujiang is called "XuandaBan", and there are some places called "slugs", but in fact, the scientific name is :"Slugs".) ）
Symptoms show that when the kiwi fruit seedling stage occurs, the leaves of the affected kiwi fruit show stripes of cracks, and only a transparent layer of skin is left at the crack, which causes the kiwi seedlings and leaves to twist in severe cases, which in turn affects photosynthesis.
Integrated prevention and control measures:
Agricultural control
The first is to clean the field frequently, cultivate in time, and remove weeds and crop residues from the field and furrow. Destruction of snail habitats and spawning sites.
The second is to turn the ground deep in autumn and winter. Turn the eggs and overwintering adults to the surface. Sunburned, frozen to death, or eaten by predators. In the plot where snails are serious, leave a small piece of weed when ploughing the land in winter, spring and autumn, put a few pieces of watermelon peel to lure the snails, and then concentrate on elimination.
The third is not to apply uncorried organic fertilizer.
Physical control
Artificial hunting: the use of branches, weeds, vegetable leaves, etc. as a lure pile, every 3 to 5 meters to place a pile, so that snails lurk under the trap heap, the next morning and then concentrated on catching, mashed deep buried.
Sprinkling quicklime belt: sprinkling quicklime between or around crop rows can significantly reduce snail damage, and the dosage of 45~75kg/hm2 can also be increased to 75~150kg/hm2, and the effect is poor when the ground is wet. Be careful not to sprinkle on the foliage, this method has a better effect on seedling preservation.
Sprinkle grass and wood ash: in the evening with dry and pure grass ash sprinkled on the stems and leaves of melon vegetables, if the stems and leaves are dry, you can spray some water first, so that the leaves are wet and then sprinkled, the snail will no longer climb up the stems and leaves to bite the stems and leaves. Using grass and wood ash water to water the soil, can play a role in killing snail eggs, grass and wood ash is still a good nitrogen and potassium fertilizer, it is really a three-for-one, more recommended to use this method.
chemical control
Snails are mollusks, not insects, and general insecticides have no control effect on them. In case of heavy rain after application, the agent is washed out into the soil, and the efficacy is greatly reduced, and it is necessary to supplement the application. The drug varieties for the prevention and treatment of snails can be used alternately, which can not only ensure the effect of snail killing and leaf preservation, but also delay its resistance to snail treatment agents, and can extend the service life of snail removal agents. Commonly used snail-killing drugs include, tetraacetaldehyde, menaphthal-based compound or single dose, there are many trade names, such as: can use 6% snail net granules 400 to 500 grams, or 6% snail granules 400 to 500 grams, or 2% snail bait 400 to 500 grams, or 5% Meta granules 250 to 350 grams, or 6% Mita granules 250 to 350 grams.
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