What medicine do persimmon trees need? Does persimmon tree need to be sprayed When does a persimmon

Hello: You can choose phoxanthion emulsion, malathion emulsion, imidophos emulsifiable concentrate is 1000 to 1500 times the concentration of spraying, spraying should be uniform.

1.Scrape the bark. The bark crack is a good place for pests to overwinter, and scraping the bark can greatly reduce the number of overwintering pests, so it is necessary to scrape the persimmon tree.

Rough rind. 2.The trunk is painted white. After scraping the bark of the persimmon tree, it is necessary to apply the whitening agent at the scraping part, and the concentration of the coating solution should be moderate, so that it is advisable to apply it without loss and not warp and fall off after drying.

3.Plastering mud. Persimmon insects and other pests in the grafted rootstock trunk bark crack of the wintering base is very large, because the bark of the black jujube tree is difficult to scrape, can be smeared on the trunk is not thin, not dry, more viscous mud, the old mature larvae suffocated in the tree.

4.Spraying control. In the later stage of persimmon dormancy, after the completion of winter pruning and other work, the tree and the tree should be evenly sprayed with 3 5 Baumé stone sulfur mixture or 5% diesel emulsion to kill the source of diseases and insects remaining on the tree and under the tree.

Main pest control of persimmon:

1. Persimmon corner spot disease: 6 July with the help of rain to spread the germs, August is the peak period of the disease, should be sprayed in mid-June 1 (copper sulfate.

2 5 (lime) 600 times (water) Bordeaux liquid.

2. Persimmon round spot disease: the ascospores formed by the mycelium of the source are mature in mid-June, spread by wind and rain, and the disease begins in August and September, and is sprayed once in mid-June 1 (copper sulfate) 2 5 (lime) 600 times (water) Bordeaux solution to prevent infection. Round spot, horn spot, anthrax.

Powdery mildew can also be controlled with Baumé stone sulfur mixture or 50% methyl tobuzin 800 1500 times liquid spray.

3. Persimmon insects: from early May to early June, the first generation of larvae are harmed from late May to early July, and the second generation of larvae begin to damage in mid-July until harvest. In mid-to-late June and mid-August to early September, be sure to pick the damaged fruit and bury it deeply.

At the peak of adult occurrence, 90% trichlorfon is used.

1000 times liquid spraying.

In addition, there are persimmon caterpillars and beetles.

Blood-spotted leafhopper, persimmon armyworm, stinging moth.

etc., can be sprayed with 40% dimethoate 500 1000 times liquid; The stinging moth was sprayed with 600 800 times the liquid of the crystal trichlorfon.

Persimmon trees need to be sprayed to control pests and diseases. Persimmon trees are generally sprayed in the following periods: About 10 days before germination, spray 3-5 Baumé stone sulfur mixture to control scale insects; From June to September, after the pests are found, they are sprayed with cypermethrin, phosphine emulsifiable concentrate and other insecticides (stinging moths, larvae of American white moths, etc.).

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Thank you for your question! [Zuo Yi].

Target: A variety of overwintering pests, reduce the source of overwintering insects, and prevent paramecium from climbing trees. Prevention and control measures:

The barrier method is used to scrape off the rough old bark of the persimmon tree, bury it deeply, and clean up the stones, debris and terraced stones at the base of the trunk. In mid-February, the persimmon trees began to be coated with shellac. Notes:

Control of overwintering larvae of scale insects such as persimmon velvet scale and paramecium on trees. Control measures: spray 3 5 ° be stone sulfur mixture, 6% imidacloprid 2500 3000 times, avermectin 5000 6000 times, 40% rapid culling EC 1000 times, 25% chlorpyrin 1500 2000 times, 5% lyphalin 4000 6000 times, 50% dichlorvos 800 1000 times, etc.

Late prevention and control objects: control persimmon caterpillars, persimmon small floating dust and scale insects.

Persimmon trees need to be sprayed several times during critical periods. Generally, about half a month before spring germination (mid-March), spray 3-5 Baumé stone sulfur mixture to control scale insects and other pests and diseases; From June to September, when stinging moths or caterpillars (larvae of the American white moth) occur, spray 2,000 times the liquid of cypermethrin and other insecticides to control leaf-eating pests.

Are you talking about a big persimmon tree or a small persimmon sapling?

Summary. Dear, persimmon trees are generally sprayed twice a year.

How many times a year does the persimmon tree be sprayed? When is it good to take medicine?

Dear, persimmon trees are generally sprayed twice a year.

How many times a year should be sprayed for persimmon trees according to the situation of pests and diseases, generally about 2 times.

Pro, persimmons are medicated once before flowering and once after flowering.

Dear, the flower back seat fruit flower should be gratefully applied with fungicides and insecticides, and before flowering, brassinin should be played once to promote flower and fruit setting. Thank you.

In the process of planting and growing persimmon trees, there will always be a variety of pests and diseases, such as common anthracnose, persimmon corner spot, persimmon round spot, persimmon pedicle, persimmon leafhopper, etc., so medicine is needed to fight insects. Different insect diseases are treated differently at different times. Medication should be administered according to the situation.

From May to August, it is the high incidence period of persimmon tree diseases and pests, strengthen cultivation management, remove pathogens in time, remove diseased stems and dead branches before germination, and take them out of the garden to bury or burn. In winter, the persimmon tree can be cleaned and pruned, and some diseased branches and dead branches can be cut off and destroyed in time. If you encounter bark warping and old bark, you must scrape them off, and then paint the wound white to prevent and control the breeding of pests, and remove the remaining persimmon stalks, which can eliminate more pests.

Matters needing attention for persimmon tree planting: 1. Persimmon scales appear in the vigorous growth period of persimmon trees, and they are generally scale insects with white sticky hairs, which look similar to catkins. 2. If you wipe the persimmon scale, there will be red liquid flowing out of the body.

The reason why it is so difficult to get rid of is that it has a layer of wax on the surface of its scale shell, which is highly resistant to pesticides. 3. Once the persimmon scale is flooded, it will have a serious impact on the growth of the persimmon tree, especially the persimmon on the tree, the fruit quality will be damaged, resulting in a large area of fruit drop, and the plant will die in serious cases.

The main pests and diseases of persimmon trees include persimmon angle spot, persimmon round spot, persimmon anthracnose and persimmon pedicle worm, persimmon star inchworm, blood class leafhopper and a variety of scale insects, and the serious situation varies from place to place. The spraying method is as follows:

1) Persimmon corner spot disease, round spot disease: corner spot disease is harmful to leaves and fruit pedicles, and the pathogen overwinters on them, and spreads and infects them by rain in the second year, resulting in early leaf drop and fruit drop. Persimmon round spot disease is mainly harmful to leaves, and the pathogen overwinters on the diseased leaves, and also causes early defoliation during the growth period, and the onset period is later than that of persimmon corner spot disease.

The method of comprehensive prevention and control of these two diseases should first completely remove the diseased leaves and stems and eliminate the source of overwintering diseases; Secondly, spray 1:(3 5):400-600 times of Bordeaux solution before the germ begins to spread about 2o days after flowering, a total of 2 3 times, with an interval of 15 to 20 days each time.

Persimmon leaves are sensitive to copper ions, and lime multi-dose Bordeaux solution should be used to prevent pesticide damage.

2) Persimmon insects: mainly for the damage to the fruit, so that the fruit is red, soft, and falling off in the early stage, and the masses call it persimmon baking. In the Yangtze River Basin, the insect occurs in two generations a year, and the mature larvae overwinter in the thick skin crevices of the branches.

In summer, eggs are laid between the fruit stalk and the fruit pedicle, and the base of the pedicle is bored into the fruit. The larvae have the habit of turning fruit into harm. Methods of prevention and control:

scrape the bark in winter and burn it intensively; Timely removal and removal of insect fruits; Spray 1000 times of 90 trichlorfon agent or 4000 5000 times of 20 rapid pyrethrin (pyrethroid) at the peak of adult worm occurrence period, and spray twice every 10 days.

3) Persimmon scale insects: there are many kinds of persimmon scale (also known as velvet mealybug), turtle wax scale, paramecium and red wax scale. Sucking sap on shoots, leaves, fruits, etc., weakens the tree, induces coal stain disease, or causes the fruit to fall early.

Prevention and control methods: First, do a good job in overwintering control, including scraping tree bark, cutting off dense insect branches, and spraying Baume 5 degrees of stone sulfur mixture, or 5 10 diesel emulsion in early winter, to kill the insect source of the interactive communication platform of wintering village officials. Second, spray 40 dimethoate, or 50 dichlorvos 1000 times liquid, or Baumé 0 5 l degree stone sulfur mixture before the swarm of nymphs (commonly known as "tree lice") has not yet formed a wax shell.

In severe cases, spray twice at intervals of 10 days. Third, protect natural enemies and avoid drugs during the peak period of natural enemies.

About half a month before spring germination (mid to late March), spray 3-5 Baumé stone sulfur mixture to eradicate overwintering pests and diseases, and the effect is better. . .

Once a year is best, after spring, around April.

Persimmon trees in the maintenance, there will be some pests and diseases, the harm to the fruit tree is relatively large, such as the fillet cicada, when it occurs, it will suck the juice of the branches and leaves, resulting in poor growth of the fruit tree, it is necessary to spray the agent in time into the wheel of spring pants line control, you can spray 80% dichlorvos milk forest search oil or 90% crystal trichlorfon, the effect is relatively good.

Persimmon tree growth cycle.

Persimmon tree management is relatively easy, and the growth cycle is relatively long, usually can grow for about 100 years, after planting needs to grow 3-4 years to bear fruit, after 15 years to reach the peak fruit period, the income period is relatively long, in the growth, need to have good fertilizer and water management, can appropriately increase the yield.

Persimmon tree spraying.

Persimmon trees in the maintenance, there will be some pests and diseases, the harm to the fruit tree is relatively large, such as the fillet cicada, in the occurrence of the sap of the branches and leaves, resulting in poor growth of the fruit tree, the need to timely spraying pesticides for control, can be sprayed 80% dichlorvos EC or 90% crystal trichlorfon.

Persimmon trees protect flowers and fruits.

When the persimmon tree is growing, in order to prevent the young tree from extracting summer shoots and causing fruit drop, it is necessary to spray foliar with 15% paclobutrazol 150-250 times liquid 7-10 days before summer shoot extraction.

Persimmon trees grow fast with spraying.

Persimmon trees in the flowering and young fruit stage, in order to grow more quickly, need to be sprayed once borax or ammonium molybdate, the effect is relatively good.

Persimmon trees flowering with medicine.

Persimmon trees need to be sprayed with brassinolide once on their flower buds during the flowering period, so as to improve its fruit setting rate and prevent physiological fruit drop.

Persimmon trees are sprayed to prevent insects.

When the persimmon tree is maintained, in order to prevent the occurrence of pests and diseases, it is necessary to prevent it in advance, and spray some 40% dimethoate emulsion 2000 times, or 50% octamateur acid emulsifiable concentrate.

Persimmon tree pest and disease prevention.

Persimmon trees in the growth, there will be some pests and diseases, so to do some preventive work, need to strengthen orchard management, and to apply water and fertilizer reasonably, during the maintenance period to prune the diseased branches and fruits, concentrated out of the garden to bury or burn, found pests and diseases to spray pesticides in time.