Are there scale insects on loquat trees and how can they be controlled?

I'm honored to be here to answer your questions. Although the time for loquat to be on the market has passed, the taste of loquat is still unfinished, and the sweet and sour taste is very missed. The origin of the name loquat is because its leaves look like a musical instrument (pipa) in ancient times, so it is named loquat, with different homophones.

Every year in March and April is the peak season, it is rich in various nutrients required by the human body, is one of the nutritious and rich health fruits.

In recent years, many fruit farmers have said that there are many scale insects and difficult to treat, and there are scale insects on loquat trees that can occur for several generations a year, that is, you do not use the right method, only to figure out the occurrence law of scale insects, find the right method, and carry out scientific comprehensive control, the effect is quite good, and the following will explain to you if you control scale insects.

First, before the germination in early spring, we should spray the whole tree with stone sulfur mixture, which can play a role in the prevention and control of overwintering scale shell adults, but this method may not be very ideal for the orchard that has been controlled, and the later stage is more serious, just because it has been used, under the protection of the scale shell in winter, the drug is more difficult to penetrate into and the scale shell has developed immunity to it.

Second, we should carry out loquat garden cleaning, clean up and burn the diseased branches, dead branches, weak branches, and weeds, scrape off the insects on the tree body, and apply stone sulfur mixture, which can also effectively reduce and prevent the damage of scale insects to fruit trees.

Third, we can also carry out biological control to protect and use natural enemy insects. This way is non-polluting.

Fourth, in the peak period of egg hatching, at this time the scale insect is the weakest time, the drug is also more sensitive, the dosage is small, the effect is good, we can choose systemic or permeable agents, can be used 2 times in a row, so the effect will be better.

Then you must observe it every day and take some medications, only then will this not happen.

It is necessary to carry out the cleaning of the loquat orchard, clean up and burn the diseased branches, dead branches, weak branches and weeds, scrape off the insects on the tree body, and apply stone sulfur mixture, so as to effectively reduce and prevent the damage of scale insects to fruit trees.

Plant special insecticides should be used, evenly sprayed on plant leaves, and should not be watered during the medication, otherwise there is no effect, and you can spray several more times to consolidate the effect.

1. Anthracnose of loquat trees: x0d x0a The harm of anthracnose to loquat trees: mainly harmful fruits.

In the early stage of the fruit, the lesions are light brown small dots, water-stained, and gradually become oval, dark brown, and the lesions are sunken, with long and dense light red dots, and then small black spots, arranged in the form of concentric rings, until decay. The fungus overwinters on the diseased fruit with mycelium and produces spores the following spring, which are spread by wind and rain. During the ripening period of the fruit, it is seriously damaged by high temperature and rain.

X0D X0A control method: combined with strengthening cultivation management, the diseased fruits are picked and burned in a concentrated manner during pruning. Spray 1:

1: 200 times Bordeaux liquid, or 400-600 times of 80% Dasheng wettable powder, or 500 times of 70% mancozeb powder, spray 1 time every 10-15 days, spray more than 2 times continuously. x0d x0a two, loquat leaf spot disease:

X0D X0A Hazards of loquat tree gray spot disease: onset on leaves, the initial lesions are light brown, round, and then grayish-white, and the boundary between the diseased and healthy parts is obvious, with a narrow black-brown ring, **gray-white to gray-yellow. After the fruit is damaged, there are obviously sunken round purple-brown lesions with small black dots scattered on them.

There are two types of lesions that infest leaves: acute type and slow type, and the acute type often causes leaf scorching and defoliation. The lesions that infest the branches are similar to the branch rot disease, and there are two types: the gelatinous type and the dry type. Gray spot can also damage fruits.

X0D X0a control method: clear the garden in winter, eliminate the source of bacteria, increase potassium fertilizer, and improve stress resistance. Do a good job in ditching and drainage, drought resistance and other cultivation management.

In the early stage of the disease, spray 1:1:200 times Bordeaux liquid or 65% zebsen wettable powder 600 times, or 70% tobuzin wettable powder 600-800 times, or 50% carbendazim wettable powder 800-1000 times, every 10-15 days, spray 2-3 times continuously.

Severe illness often occurs after heavy rain or storms. X0D X0a control method: First of all, it is necessary to enhance the tree potential, apply more phosphorus and potassium fertilizers, and remove the diseased leaves in the field in time to reduce the source of disease.

Yellow caterpillar is the main pest of loquat, which pests young leaves and shoots with larvae, and can also eat old leaves, young stems, epidermis, flowers and fruits when it occurs for a long time. After the leaf is damaged, it becomes a notch. In severe cases, the entire leaf is eaten up, leaving only the veins.

The larvae are pale yellow to orange-yellow, with hairs on the dorsal line of each segment and both valves, and stinging hairs on them. The sixth segment has a pair of distinct black-brown hairs on the back, which are poisonous. More than 3 generations occur in a year, the 1st generation occurs in 5 June, the 2nd generation in 7 August, and the 3rd generation in 9 October.

Pupae overwinter in the branches, bark crevices, or on the back of leaves. X0D X0A control method: In addition to killing larvae, pruning and picking insect cocoons in winter, and protecting and utilizing natural enemies and parasitic wasps, it is necessary to spray pesticides when the larvae hatch at the beginning of spring, summer and autumn.

It can be used to kill larvae with 20 pyrethrin EC 3000 4000 times, deltamethrin 4000 5000 times, 90% trichlorfon crystals 1000 1500 times or 50% pine borer EC 800 times.

No matter how sad you are, you still have to live, since you have no ability to change, you can only accept it and look forward and start your life again.

Answer: Disinfect the seedlings and soil before planting, and plant them reasonably densely to control the light transmittance in the field. During the planting period, strengthen fertilizer and water management, avoid too dry and too wet, enhance tree potential, improve disease resistance, remove diseased leaves in the field in time, combine with organic fertilizer, properly plough the soil, and reduce the number of pests and diseases.

No matter what kind of disease occurs in loquat, in the early stage of the disease, corresponding prevention and control measures can be adopted according to the symptoms of loquat. Field flushing or drip irrigation microbial bacteria fertilizer root children diluted 300 500 times to control various diseases within a controllable range and prevent further expansion of diseases.

One. Strengthen fertilizer and water management.

1.Plant green manure to cover the soil of the garden. Planting leguminous green manure "bamboo beans" between the rows in summer and green manure "arrowtongue beans" in winter can solve the problem of organic fertilizer, improve soil, enrich the soil, and increase economic income.

In addition, it can prevent soil erosion, improve the microclimate of the park, and achieve early moderate production and high yields.

2.Proper fertilization. Loquat requires a lot of fertilizer and potash.

The loquat orchard with a yield of 1000 kg per mu has an annual fertilizer rate of 28 kg of pure nitrogen, 12 kg of phosphorus pentoxide and 35 kg of potassium oxide. Phosphorus and potassium fertilizers should be appropriately applied to loquat orchards in mountainous red soils. Fly ash fertilizer is rich in potassium and alkali, which not only reduces the acidity of red soil, but also increases yield.

Fertilization of high-yield loquat orchards is generally three times a year: the first time is to apply strong fruit fertilizer in mid-February, mainly with fast-acting fertilizer, and appropriately increase the proportion of nitrogen and potassium fertilizer. The second time was in mid-March, and the pre-harvest fertilization was mainly nitrogen.

The third time, from September to October, pre-flowering fertilizers are applied, mainly organic fertilizers, deep furrow fertilization and deep rooting. Conditionally, watering in the dry season and ditching and drainage in the rainy season.

3.Trim properly.

In general, pruning can be done in conjunction with flower thinning from September to November, and the canopy height can be controlled to allow for ventilation and light. Trees with a height of about 3 meters should fall down to control the dominance of the top. Loquat pruning is mainly based on sparse shoots.

In addition to sparse, dense shoots, fruiting branches with excessive flower spikes in parts should be removed and pruned. The side branches and long branches are renewed and retracted, and the diseased branches, weak branches, and dead branches are sparse at the same time.

4.Thinning flowers and fruits at the right time.

The flowering thinning period should be carried out in early November. One or two flowers should be left on one branch, and the rest should be removed, so that the ratio of fruiting branches to vegetative branches is that of flower spikes that open before the middle of the month, stunted spikelets, and early and late maturing flower spikes should be sparse, leaving only firm flower spikes. In February, when the young fruits are stable, the fruits are thinned, and the diseased and insect branches, deformed fruits, and over-dense fruits are sparse.

5.Pest and disease control.

The main disease of loquat is leaf spot. Control measures: remove diseased leaves in autumn and winter, and spray 800 1000 times of 50% carbendazim wettable powder in the initial stage. The main pests are yellow caterpillars, rising tail insects and longhorn beetles, which also need to be controlled in time.

1) Yellow caterpillars and ascending tailworms are both important pests that damage leaves. The larvae eat the young leaves. In severe cases, the new leaves of the entire tree are eaten, affecting growth and fruit.

Control method: In the larval damage period, in addition to manual killing, 90% trichlorfon 500 1000 times can be sprayed.

2) The larvae of longhorn beetle are mainly harmful to loquat branches. Control methods: Adults can be manually killed, and larvae can be hooked. Dimethoate and trichlorfon can also be injected into wormholes to poison larvae.

When choosing the right soil for planting, it is necessary to choose in the spring, the temperature of planting should be controlled at about 23 degrees, pay attention to the density, and do a good job in seed seedling; Be sure to use insecticides and herbicides regularly.

The temperature should be controlled between 23 degrees and 28 degrees, watering and fertilizing in time, and the work of setting the value should be done, the branches and leaves must be pruned in time, and the prevention work should be done, and high-quality seeds should be selected, and high-quality soil should be selected, and different pesticides should be selected according to different situations.

These control methods can sterilize the soil, carry out insect pest control on loquat trees, spray insect repellent drugs on the saplings of loquat trees, insert some scarecrows around, and place some insect repellent products.