Cockroaches are the collective names of mosquitoes and flies larvae that cause harm to leeks, and are important pests in the production of leeks in the city. Aphids are mainly mosquitoes, also known as leeks; and flies and onion flies are the major pests. For the fly, also known as the earthworms. In the Beijing area, it can occur all year round. More than 95% of the two-year-old leeks in the Beijing suburbs are affected by crickets and occur in general; the leaves of the injured leeks are deformed and wilted, and the roots of the leeks are rotted, the plants are brown and even fall down and necrotic. Lead to lack of seedlings and ridges, causing serious damage. Now is the main season in which locusts are harmed. According to their law of occurrence, appropriate measures can be taken to prevent and control them properly. This can have a multiplier effect. It is crucial to ensure the high yield and quality and safety of leeks.

Amaranth

1. Identification and regularity

The adult larvae of the leeks are small mosquitoes with a body length of 3-5 mm and a dark brown color; the larvae are 5-7 mm long, the head is bright black, and the milky part of the body is nearly transparent and has no feet. In the open field vegetable field, the larvae lived in 3-4 cm of soil in the leek bulbs and root circumference. Normally, the first generation larvae hatch from late April to late May. Larvae prefer to eat in a humid environment. Adults have no tendency towards unfaded manure.

2. Control methods

Agricultural control: Select the fine weather in the early stage of the germination of leek, and open the top soil of the stalks and expose the upper end of the bulb to maintain 5-7 days, which can significantly reduce the damage.

Chemical control: spraying control at the emergence stage of adult emergence in mid-June and mid-October, spraying at 9:00am to 11:00am; 1.8% avermectin EC 2500-3000 times, 5% stuck (Quinilural) EC 1000-1500 times, 40% TC (Avidicarb) EC 1000-1500 times, 50% IVC 4000-5000 times, or 12.5% ​​Beta-cyfluthrin suspension 8000 -10000 times liquid spray control. During the larval stage, use acupuncture points, irrigating roots or sprinkling; use 3% Milor (chlorozophos) granules 1-1.5 kg/mu, spread evenly on the ground near the culm, and then water. It can also be applied to the side of the condyle, or 80% trichlorfon powder 800 times, 40% phoxim 1000 times, 40.7% chloramphenicol 1500 times, 50% chloramidine. 4000-5000 times liquid spray, spraying liquid 80-100 kg/mu.

Earthquake

1. Identification and Occurrence

The adults of the fly species are 4-7 mm in size and are grayish yellow to dark brown in color. The eggs are long and elliptical, milky white and about 1 mm long. The larvae are cocoon-like, 7-8 mm long, with a pale yellowish milky coat and degraded head with 1 black hook. Occurs in 1-2 generations in the year, and the pupa and a few mature larvae live in the soil for winter, and early spring begins to emerge. From early April to early May, it was the first generation of the dying period. Eggs are produced in moist soil near the roots of the plants. Adults have obvious tropism towards unfamiliar manure and green onion.

The body length of the onion fly is 4.5-6.5 mm. The back of the adult wing is very short and the abdomen is flat, long oval, and grayish yellow. Eggs are oblong, about 1 mm long and white. The larvae are wormlike, about 7 mm long, and the milky white tape is yellowish. It takes 3-4 generations a year to get winter in soil or dunghills. In late April and early May, adults emerged in large numbers and spawned in the bases, bulbs, and topsoil of the plants. The eggs ranged from 3-5 days. The larvae quickly infiltrate into bulbs after hatching and the larval stage is 17-18 days. Adults have a strong tendency towards unfamed manure and organic matter.

Agricultural control: Apply sufficient manure and organic fertilizer, do not use raw manure. After the occurrence of mantle, it can be mitigated by flooding.

Artificial trapping: the ratio of brown sugar:vinegar:water is 1:1:2.5, a small amount of sawdust and trichlorfon are used to trap and kill adult insects. It is advisable to trap the container with a diameter of 20-30 cm, and the attractant should keep fresh, and 3 pots per acre. -6 pots, contiguous traps better.

Chemical control: When the adult population suddenly increases, it is the peak period of adult occurrence and it is necessary to control it in time. Within 10 days is the appropriate period for the control of eggs and newly hatched larvae. The method and amount of application can be controlled with reference to leeks.

Mackerel In Vegetable oil

Mackerel Fish In Oil,Mackerel In Round Can,Mackerel In Vegetable Oil,Canned Mackerel In Vegetable Oil

Tropical Food Manufacturing (Ningbo) Co., Ltd. , https://www.tropical-food.com