Comprehensive Prevention and Control Techniques of Leaf Pests of Poplar

First, the prevention and control plan design combines the life history, occurrence regularity, occurrence area and damage degree of poplar leaf-eating pests, and carries out the design of construction operations. The design content includes the site of operation, type of forest, type of pest, hazard (degree of damage, rate of plant damage, density of insect population), scope and area of ​​control, and the area, technical measures, and engineering volume should be implemented in the small class or owner of the forest property.
II. Monitoring and forecasting of insect pests In the area where counties and counties have taken place, a central monitoring station will be set up, so that one county, one or two full-time or part-time telescope operators will be fixed, and monitoring sites will be established in townships (towns) and forest farms where the focus occurs. Different species of poplar forests were monitored for insect pests, and insect pests were forecasted on the basis of monitoring results.
(A) insect monitoring
1. On the basis of the insect pests in the previous year, the inspection method was used to monitor the occurrence of leaf insect pests in poplars by examining insect status, hazard status, and insect excretion.
2. Lamp-induced method Using the phototaxis of poplar leaf-eating pests, during the adult emergence period, black lights were hung at appropriate locations along the forest edge at 18:00-24:00 to monitor the occurrence of pests.
3, sexual inducement using living females or sexual attractants, monitoring the occurrence of pests.
(II) Insect pest forecasting The prevention and control of poplar leaf-eating pests is large-scale and costly, and it is necessary to accurately grasp the optimal timing for prevention and control and the control range. Therefore, it is necessary to grasp the larval insect pest forecast, and other insect status forecasts are mainly periodic. When the site conditions are the same, the standard strains shall be selected for the four side trees and the farmland shelterbelts at a ratio of 5%; for the patch forest, a standard land shall be used, and a standard land shall be set for each 400 acres of forest land, and the standard trees within the standard land shall be used. Not less than 20 strains. During the survey, 5 randomly selected trees were sampled in standard plots. Samples were randomly selected from the east, west, south, and north, and one branch of 50 cm was randomly selected and observed once every two days to record the progress and occurrence of pest development. The statistical criteria for the area of ​​occurrence and the degree of harm are: Occurrence area: Average 50cm standard twigs and 2 larvae; Harmful degree: Mild 50cm standard twigs 2~5 larvae, moderate 6~8 larvae, severe 9 larvae the above.
III. Prevention and control (1) Prevention and control countermeasures According to the principle of "prevention first, comprehensive treatment" and the principle of protecting the ecological environment. Mildly Occurring Areas: Mainly based on natural regulation to improve the ecological environment and improve self-control capabilities. Strengthen the dynamic monitoring of pest populations, protect natural enemies and exert their control; moderately-to-severe areas: comprehensive treatment measures based on biological measures. Priority is given to the use of biological pesticides (such as Bacillus thuringiensis, Beauveria bassiana, etc.), viruses, bionic preparations to reduce the population density of the population, and then to increase the population of natural enemies to achieve biological control of pest population density. For forests with particularly severe pests, large-scale outbreaks and disasters should be controlled by aircraft, and the ground should be timely controlled through chemical pesticides, such as drilling and injection. The fundamental measure is to timely clear insect pests, update tree species, and create mixed forests to improve their ecological conditions, enhance the growth potential of forest trees and the resistance of forest trees to insects.
(II) Control measures
1, artificial physical control over the winter (over summer) is the use of artificial measures to prevent and control the favorable opportunity, due to tall poplar tree, to strengthen the control of cockroaches and adults will achieve a multiplier effect. Collecting underground defoliation or plowing the soil artificially to reduce the number of overwintering pupa, the use of insecticidal lamp (black light) trapping and killing during the emergence period of adult plague, will help reduce the population density of the next generation. According to the characteristics of the first-instar larvae of most types of larvae, human tissue can be extirpated by humans to kill large numbers of larvae. It is also possible to use the larvae's habit of sagging after being frightened and to kill the fallen larvae by shaking the trunk. For adults such as the spring cricket, they need to crawl on the tree to lay eggs. In the adult eclosion before the eclosion of the trunk in the trunk tying plastic sheets and other methods to block the adult tree lay eggs.
2. Biological control such as Bt sprays biological pesticides and virus control before 3rd instar larvae. The ground spray tree height is less than 12m in the young forest, the dosage of Bt 200 billion international units per mus, the insecticide of 1 to 200 million spores/ml of the chrysanthemum, and the avermectin 6000 to 8000 times. Tall forests, if there are airport conditions, can consider the use of aircraft control. Patch forests and sea defense forests, Trichogramma release during the egg phase.
3. Bionics and other chemicals control 20% diflubenzuron III 25g/mu, 1.2% diphtheriae EC 1000~2000 times. Bionic agent should pay attention to the use of medication time, the younger the worm is better.
4. Punching and injection of drugs to prevent the occurrence of serious, spray difficult tall trees, can be controlled by injection and injection. Use a hole injection machine to drill 3 to 4 holes in different directions at the diameter of the tree, and inject 40% omethoate EC, 50% methamidophos EC, and 40% monocrotophos EC. The dosage is 2~4ml/10cm DBH, original drug or 1x dilution. After injection, pay attention to sealing the injection port.
5, poison ring and poison rope to control the upper and lower tree trunks and after the winter habits of the tree pests, the use of the agent in the trunk painted ring or tied poison rope method. Before the larvae are planted on the tree, 10 ml of 2.5% deltamethrin, 10 ml of omethoate and +1 kg of waste oil are mixed, and a 3 to 5 cm wide closed loop is coated on the trunk. Mix 2.5% deltamethrin with waste diesel 1:10. Soak the packaging paper rope to form a poison rope. Bind at the DBH for 2 weeks.

From the month of May, the new crop of onion from Jinxiang has harvested. After dried enough, the Yellow Onion can be packed and shipped from the month of June. The new crop Fresh Onion has very beautiful appearance and great quality. Jinxiang is a famous county which has large area planting garlic and onion. 

1. Commodity name: Fresh Onion

2. Feature: Natural color, Thick and full skin, No stain and soil on outer skin, Firm and no rotten.
3. Size: 3.0-5.0cm, 5.0-7.0cm, 7.0-10cm
4. Variety: Yellow Onion and Red Onion
5.Packing:
1) 10kg/carton, 20kg/carton, 10kgs/mesh bag,20kg/mesh bag and 25kgs/mesh bag
2) or according to the clients' requirements.
6. Supply Period:
A) Fresh season: May to the middle of August
B) Cold storage season: August to December.
7.Conveyance:26-30MT/40'HR (loading quantity depending on packing)

8.Transporting and storing temperature: 0°C  -+1°C

Yellow Onion


Yellow Onion

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