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There are a lot of scale insects in the persimmon book, which cannot be controlled with salt water, if it is particularly serious, you can spray some ** drugs for this insect, which is more effective than salt water.
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It cannot be controlled with salt water, although salt water can kill scale insects, but it also has great damage to persimmon trees.
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The effect of saline is not very good, you can choose to use imidacloprid solution to kill insects, this medicine is more effective.
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Chlorpylophos is an ideal type of scale insect.
Pesticides, non-systemic insecticides, are used to control sagittal scales, chaff scales, wax scales, brown round scales, mealybugs, cotton aphids, cotton red spiders, cotton bollworms, alfalfa weevils and other pests and mites on fruit trees, cotton, vegetables and other crops. Moreover, it is not internal, safe and efficient, and can treat whiteflies and aphids.
Kill all beetles in seconds.
Green worms, the disadvantage is that the taste is a bit big.
Thiamethoxam. It is a second-generation nicotine with a completely new structure.
It is a high-efficiency and low-toxicity insecticide, which has stomach toxicity, contact killing and systemic activity against pests, and is used for foliar spraying and soil root irrigation treatment. It is quickly absorbed after application, and transmitted to all parts of the plant, has a good control effect on stinging and sucking pests such as aphids, planthoppers, leafhoppers, whiteflies, etc., and has a special effect on scale insects adults after being matched with phosphorus.
Silicone penetrants have a very low surface tension.
After adding pesticides in a certain proportion, pesticides can be made on the surface of plants with super spreadability, permeability and dispersion, wettability, efficient systemic and conductivity, especially on the surface of the foliar wax layer and other difficult to wet surfaces to achieve rapid wetting, dispersion, and penetrate into the pores of plants, improve the efficacy, rain resistance, and make the effect long-lasting.
Note: The three agents of phosphine, thiamethoxam and silicone penetrant complement each other and are indispensable. When applied, spray the leaves and spray the wet soil surface or irrigate the roots to kill the insect eggs in the soil, so that it can be killed, and the proportion of the drug is 1:
1500 times, take 1 gram of each agent, take a total of 3 grams, and then add 1500 grams of water.
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1. Comprehensive control of persimmon pedicles: 1. Spraying control on trees - 7-8 days after the initial flowering period of persimmon trees (the peak period of adult emergence) spray 25% chlorpyramide 3 2500 times; or 2,500 times the profit of extinguishing and sweeping; or more than 1000 times; or 2000-2500 times of high-efficiency permethrin mid-July, manually remove and pick up the zombie fruit formed by the victim, and bury it deep in mid-month to early August, and the control of the first generation of adults (peak emeritation) is the same as above. The key part of the spraying is the fruit pedicle.
4. At the same time, the persimmon pedicle insect control was carried out on black jujube trees.
Second, the comprehensive control of persimmon scales In the first half of the month, the persimmon scales are sprayed on the trees at the peak of the stinging period of 1500-2000 times or 800-1000 times of the scale and the line of gray butterflies, which is meticulous and thoughtful. 2、
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Summary. Scale insects on persimmon trees are controlled at the end of May.
The best time to control scale insects on persimmon trees is the hatching and hatching stage of larvae.
The best time to control scale insects on persimmon trees is mid to late May or mid to late August, and the best time to control larvae is when they appear.
The best time for the control of scale insects on persimmon trees is when the larvae have just hatched and shed their shells.
The best time to control scale insects is at the larval stage.
When is the right time to spray persimmon tree scale insects.
Scale insects on persimmon trees are controlled at the end of May.
Scale insects on persimmon trees are controlled at the end of May. The best time to control scale insects on persimmon trees is the hatching and hatching stage of larvae. The best time for the control of scale insects on persimmon trees is mid to late May or mid to late August, and the best time to control larvae is when they appear.
The best time to control scale insects on persimmon trees is when the larvae have just hatched and unshelled. The best time to control scale insects is at the larval stage.
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Scale insects....Female adults and nymphs suck nutrients on the branches, and occasionally on the fruits and leaves. In severe cases, the shells are densely overlapped, forming branch surfaces and unevenness, weakening the tree, and destroying the whole orchard in 3 to 5 years. It can be controlled with cyfluthrin, matrine, halodioxapyr, pyridafen, etc.
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You can use a stone sulfur mixture to spray the tree in a comprehensive way, and the stone sulfur mixture is mainly to kill bacteria and kill the eggs of scale insects. When the scale insect is found, it can be treated in a timely manner with drugs, and the general selection of drugs can use copper thiazide, which can be sprayed before the evening, and if it is found when it is more, you can add a little additives to improve the time of attachment.
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Thanks for inviting me, there are a lot of little white bumps on the persimmons, what's going on?
For this problem, I deliberately walked around the village and found that there were a total of 9 persimmon trees planted in the village, and three of them were small white bumps on the branches or persimmons.
The persimmon tree has white bumps because of the cotton scale insect, which mainly harms the persimmon tree, as well as other pear trees, peach trees and other fruit trees.
Persimmon tree cotton scale insects, is like cotton-shaped white flocculent sticking to the branches, some branches are sticky, the harm is more serious, slowly grow to the persimmon, after growing to the persimmon, if you scrape these white dots will find, there are some concave points on the persimmon like a small wound, it is the scale insect to put its mouth into the persimmon to absorb the persimmon juice, resulting in a little wound on the persimmon, if not prevented, let it grow, basically the persimmon grows up is not good, the appearance is poor, the taste is poor, And little by little, it's like getting sick, who wants to eat this persimmon?
I took a closer look, this time these three persimmon trees with cotton scale insects are because the leaves grow relatively densely and the place where they grow is in an unventilated place, so the biggest reason for the persimmon trees is that the persimmon trees are not well ventilated and the leaves grow too densely.
To control persimmon tree scale insects, the simple and crude method is: thinning branches and scraping bark. Carry out some thinning of branches and leaves to create a ventilated and light-transmitting environment for persimmon trees.
Persimmon trees that have grown cotton scale insects should scrape the bark with a knife to scrape off the cotton wool-like scale insects first, and then apply lime to the branches or spray stone sulfur mixture. There is also a method that is not willing to scrape off the insect body on the branches, so the only way to use the pesticide name of the scale insect control is saprin, or the mesokill, these two pesticides are sprayed on fruit trees, but these two pesticides are very toxic, and they need to be sprayed many times to have an effect.
In order to prevent the second year of persimmon trees from growing cotton scale insects, it is necessary to prune once in winter, and the dense branches should be reasonably thinned and the excess branches that affect ventilation should be cut off. Before the persimmon tree germinates in early spring, it is necessary to use stone sulfur mixture and oxidized dimethoate and spray it on the tree stem to eliminate overwintering pests.
The persimmon tree is a tree species of great significance. Since it has been able to bear fruit, it is also a small matter to prevent persimmon trees from developing cotton scale insect diseases, prevention is more important than **, I hope that everyone's persimmon trees will bear fruit in the coming year, prosperous, persimmon Ruyi.
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Clause. 1. Scrape the bark in spring and burn it intensively to eliminate the overwintering eggs. In early September (before the insect goes down the tree), tie a grass ring at 30 cm from the ground in the trunk of the persimmon tree, trap insects to overwinter, and solve the persimmon tree before germination in the spring of the second year, and burn it intensively, which can greatly reduce the number of insect eggs and reduce the trouble for later prevention and control.
During the dormant period of persimmon trees, that is, in March, the garden was cleared, and 1-3 times were sprayed with 5 Baumé stone sulfur mixture + 50% chlorpyrifos 1500 times.
Clause. 2. In the early stage of nymph dispersion and transfer, 1500 times of 50% chlorpyrifos + 2000 times of 10% imidacloprid wettable powder or 2500 times of avermectin emulsifiable concentrate can be evenly sprayed on the tree.
Clause. 3. Seize the peak period of nymphs in late April and early May, spray 1500 times of 50% chlorpyrifos or 3000 times of 5% acetamiprid or 2000 times of avermectin. In the early to mid-June, early to mid-July, early to mid-September and other generations of nymph damage peak, and then continuous spraying of the above agents, can effectively control the scale insects on persimmon trees.
Chlorpylophos is an ideal type of scale insect.
Pesticides, non-systemic insecticides, are used to control sagittal scales, chaff scales, wax scales, brown round scales, mealybugs, cotton aphids, cotton red spiders, cotton bollworms, alfalfa weevils and other pests and mites on fruit trees, cotton, vegetables and other crops. Moreover, it is not internal, safe and efficient, and can treat whiteflies and aphids. >>>More
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Persimmon tree pest control.
First of all, the persimmon scale is a very serious insect pest of persimmon trees, persimmon scale is a very serious insect pest that often occurs in persimmon trees, persimmon scale is a kind of scale insect, belongs to a very difficult to kill insect pest. Persimmon scale is a white scale shell with white sticky hairs, which looks like poplar catkins, and if the scale insect is wiped off, there will be red liquid flowing out, in short, it is a very disgusting and annoying insect. Once the scale insect occurs, it is very difficult to eliminate, and the surface of the scale insect scale insect has waxy substance on the surface of the scale insect and has strong resistance to insecticides, so it brings great difficulties to the insecticidal work. >>>More
It's the kind of insect that looks white, very disgusting, squeezing it with your hands, and there will be red blood, looking at more disgusting insects, it can be said that persimmons have been harmed by this kind of bug, and this kind of bug also likes to harm the fruit, you say angry people are not angry. In fact, persimmon trees are relatively simple to manage. Generally, other insect pests rarely occur, and in terms of the climate season in Hebei, persimmon trees are only harvested in summer. >>>More