What is the time of hawthorn heartworm control? How to control the insects in hawthorn fruit? ，

In mid-June, the tree tray is sprayed with 100-150 times parathion EC to kill the overwintering heart-eating insect larvae; In early July and early to mid-August, 1,500 times of parathion emulsifiable concentrate was sprayed on the trees to eliminate heart-eating larvae. Cong Xiang cavity.

Effective methods of prevention and control:

1. Strengthen orchard management: reasonable fertilization and irrigation to enhance tree potential and improve tree resistance. Scientific pruning, thinning flowers and leaves, pruning diseased residues and dense branches, adjusting ventilation and light transmission, paying attention to orchard drainage in the rainy season, maintaining moderate temperature and humidity, combined with pruning, cleaning the orchard, and burying or burning the diseased residues to reduce the source of disease.

2. Protection and utilization of natural enemies.

3. Chemical control: spraying and control in the adult stage and egg stage. It is recommended to spray 1000 times of 50% thiophos EC and 1000 times of 50% malathion EC.

Generally, before flowering, spray Honglu to apply pesticides for control, and 7-10 days after flowering, and at the same time, before hawthorn flowering, young fruit stage, fruit expansion stage, spray strong fruit pedicle to thicken the fruit pedicle to improve nutrient delivery. Prevent falling flowers, falling fruits, cracked fruits, stiff fruits, deformed fruits, hunger and wide make the fruit coloring beautiful, fruit shape and good taste. Combined with the spraying of 800 times of the new high-lipid film, it can play the role of liquid film bagging, which will not affect fruit respiration, prevent fruit rust, prevent cracking and rot and brighten the fruit, improve the coloring and brightness of the fruit surface, reduce residual toxicity and improve quality.

Morphological characteristics of hawthorn silverfish.

Adult females are long, broad, and slightly smaller males, oblong and tan-brown, with black-brown posterior ends of elytra. head width short; compound eyes black nearly spherical, antennae hammer-shaped; 6 knots. The prothorax is rectangular and the width of the head.

elytra nearly rectangular, with 8 longitudinal dots, forming ridged sulcus; The anterior margin and wing tip 1 3 are finely hairy, the female is slightly rounded at the end of the elytra at the dorsal view, and the male is slightly concave. The abdomen is short, the ventral plate is 5 segments. The forefoot and midfoot are quite close to each other.

The posterior thoracic ventral plate is 2 to twice as long as the abdomen, causing the hind feet to appear to be born at the end of the body. The hip plate is slightly exposed outside the elytra. The leg segments of each foot are flat and broad, with 4 segments, and the ends of the feet have 2 claws.

oval-oval, long-diameter, short-diameter, white to milky-white. The larvae are 5-6 mm long, the internodes are slightly curved, no feet, and the body is obese. The head is pale yellow, and the mouthparts are dark brown.

The gil part is 12 milky white, the anterior thorax is thick and tapering backwards, the anterior thoracic shield is light yellow, the anterior thoracic ventral plate is more ossified, light yellow dense with short hairs, and the ventral surface of the end of the abdomen has 1 light yellow-brown small tumor process. Valves 9 pairs. Pupae are 5-6 mm long, long cylindrical, milky white to brown.

Hawthorn silverfish occurrence law.

Shanxi has 2 generations per year, and can overwinter in various insect states, but mainly adults and larvae. It began to be active in mid-March, and the occurrence period was uneven, and there were three peak periods for adults to emerge from trees: the end of April to the beginning of May; Mid-July to early August; From the end of September to the beginning of October.

From mid-July to early August, the largest number and longest duration were occurrence, which consisted of adult and first-generation adults who overwintered larvae, and it was the period of scattered spread and invasion of new trees. In mid-November, when the temperature is o, they all enter the overwintering state. Non-overwintering insect duration:

The adult stage is 50-60 days, the larval stage is 23-28 days, the pupal stage is 15-20 days, and the egg stage is 22-27 days. After the adult worm emerges from the tree, it flies around the tree or crawls along the trunk, and has the ability to fake death. Adults mostly bury from the groove of the longitudinal dead skin layer of the main trunk of the tree, the diameter of the cavity is about round, and the cavity is alternating horizontally and vertically and decays downward, which can reach the root.

At the end of the cavity, there is often a slightly enlarged egg chamber, each chamber containing 15-20 eggs. The hatched larvae are nearly triangular, and after 14-16 days of molting, they become normal-shaped larvae, and then mature after 9-12 days, and pupate in their own pupation chambers.

Hawthorn silverfish control methods.

1. Strengthen comprehensive management and enhance tree potential to reduce occurrence.

2. During the tree emergence period, the trunk of the tree is sprayed with high-concentration contact killer to form a drenching state, and the effect of poisoning and killing the adult insects is very good. Chrysanthemum cheese can be used such as enemy killing, kung fu, extermination, rapid killing, Uranus, cypermethrin, etc., or commonly used organophosphorus pesticides such as dimethoate, Acasses, malathion, etc., are used 2000 times, single, mixed or its compound has a good effect. It has a concomitant effect on branch pests such as Gidding.

Before freezing, the garden is turned about 5 cm deep, and the soil is scattered to expose the overwintering cocoons to the surface and freeze to death. 2. Cover film. Before the larvae are unearthed, the garden is covered with mulch or the soil is cultivated on the tree tray to prevent the larvae from coming out.

3. Ground spraying. In early to mid-June, ground spray with Beauveria bassiana powder (10 billion spore grams) or parasitic nematode fluid of peach heartworm, and pay attention to maintaining soil moisture after spraying. 4. Spray on the tree.

At the beginning of larval hatching, spray 1000 2000 times of 25% chlorpyramide No. 3 suspension or 1500 2000 times of 50% octycourea emulsifiable concentrate.

Trap and kill adult worms with a sweet and sour solution prepared with 5 parts of brown sugar, 20 parts of vinegar and 80 parts of water to trap and kill adult pear heartworms. On average, one pot of sweet and sour liquid is hung on every 10 trees, which can basically control insect pests. In the beginning of the adult insecticide, spray 50% dichlorvos 1200 1500 times, or 90% trichlorfon 1000 times, or lead arsenate 200 times, or 5% Taibao EC 1000 2000 times.

The answer in front is prevention, and the answer in the back is governance.

Hawthorn pink butterfly: The larvae overwinter in the nest of the leaf roll, and when the larvae germinate in spring, the larvae are transferred to the young shoots to produce damage, gnaw on the young shoots and young leaves, and then draw the wire and form a net on the branches. It can be prevented and controlled with 50% phoxanthion emulsion 1000 times liquid.

Peach heartworm: mainly harmful to fruits. Before the overwintering larvae emerge, plough around the plant, and apply 75% phoxanthion emulsion kilogram to the soil to trap and kill the larvae.

The red hawthorn is touching and lovely, if you guess that the fruit is infected with diseased mountain and land pests, it is not good, so how can these cute little fruits prevent pests and diseases?

Hawthorn flower rot.

Hawthorn powdery mildew.

It mainly causes damage to leaves, new shoots and fruits. The affected area is covered with white powder, which is in the shape of a velvet blanket, and the new shoots are damaged, and in addition to the emergence of white powder, the growth is thin. The internodes are shortened, the leaves are elongated, curled and twisted, and in severe cases, they dry up to death.

Clean up diseased branches, leaves, and fruits, and destroy them in a centralized manner.

Before germination and flower bud stage, spray five-degree stone sulfur mixture, after flowering to young fruit stage, spray 1-2 times of stone sulfur mixture or 25% powder rust 1000-1500 times according to the onset of the disease.

Hawthorn red spider.

In early spring, the old bark and warped bark on the tree are scraped off to eliminate the overwintering adults.

Spray 20% dichloricidal emulsifiable concentrate 800 times, pyrethroid 2000 times, 73% gite emulsifiable concentrate 2000 times and 50% nisollang emulsifiable concentrate 2000 times with good ovicidal effect, and the specific spraying opportunity and frequency are judged according to the amount of occurrence and control effect.