Prevention and Control of Several Major Diseases and Pests of Walnut

First, walnut limb moth

Distribution: widespread distribution throughout southern Shaanxi.

Harm: When the larvae pecked green fruits in June and August, the fruits became dark and fell off early (commonly known as black eggs), and were the main pests that affected the city’s walnut yield and quality. The number of these pests was directly proportional to the degree of desolation under the trees. .

Control methods:

1. During the winter months to April of the following year, the plants were re-turned deep into the soil under the trees to remove weeds and litter, in order to block and reduce overwhelming insect sources.

2. Pick and drop fruits and collect black fruits before mid-June, and collect them deeply to eliminate pests within the fruit.

3. Wherever the first two methods of prevention and control are adopted in the mountains or inconvenient, on the occasion of slight yellowing of wheat and wheat, every 2 consecutive days, a second round of crown spray of 2.5% emulsion or kung fu emulsion 3000 to 5000 times is used. Insect protection.

Second, walnut small giard

Distribution: There are distributions throughout southern Shaanxi.

Injury characteristics: larvae mainly foraging 1-2 years old shoots, spiraling in the phloem tunnel, cut off nutrients and water transport, resulting in dry shoots and saplings, is a serious impact on the city's walnut tree growth and results of the main pests one.

Control methods:

The most cost-effective way to combat this worm is to cut off the dry branches (with a little live branch) thoroughly between mid-April and mid-May, or when the fruit is harvested, and burn them to destroy the pests in the shoots.

Three, aromatic wood moth

Distribution: There are sporadic distributions throughout southern Shaanxi.

Injury characteristics: larvae feeding damage to the walnut neck cortex and xylem, the tree vigor was weak after the victim, the leaves withered, the whole plant died in the following year.

Control methods:

In 1/July and August, a 2.5% emulsion of 300-500-fold emulsion was applied to the invasion hole of the neck and neck larvae to poison young larvae.

2. When the larvae enter the xylem, first cut open the root and neck soil, remove the insect in the hole, and then use a syringe to inject 80% of the dichlorvos emulsion 50-100 times into the wormhole; you can also use the poisonous cotton ball of dichlorvos Block the wormholes and seal them with wet soil to kill the larvae in the xylem.

Fourth, ginkgo egg moth

Distribution: Townships in Zhenan and Surabaya.

Injury characteristics: Ginkgo larvae are large, larvae eat walnut leaves, often can eat the whole tree walnut leaves vanished.

Control methods:

Grasp the three links: First, before the beginning of April, using a small hammer or axe to kill the insects; second, the young larvae spray 40% of the dimethoate emulsion and 90% of the enemy Insect crystals 1000 times or 2.5% anti-emulsion 3000-6000 times; third is 7-8 months infestation, and focus on the destruction of insects.

Micro Laser Distance Sensor

New product of U85 micro laser distance sensors use highly focused class 2 laser to detect objects or measure distances, and can return a measured value via varieties intface( serial, usb, rs232, rs485, bluetooth etc.). The electronic distance sensor is a very small Laser Distance Sensor, but high resolution up to 1mm and long distance measuring sensor - teachable measuring range of up to 30m. Extremely accurate distance sensing sensors, errors down to ± 1mm. And the mini sensors and measurements support continuous measurement function, great for compact solutions(eg: robots) with the smallest Laser Distance Sensor of the world!

Parameters of U85:

Mini Laser Distance Sensor,Optical Laser Distance Sensor,Smallest Laser Range Sonsor,Laser Measuring Sensor

Chengdu JRT Meter Technology Co., Ltd , https://www.rangingsensor.com