What medicine is most effective for green stink bugs?

The green stink bug belongs to the family Miridae in the order Hemiptera. It is an important pest that harms a wide range of hosts, occurs over a long period of time throughout the year, and is difficult to control. We should understand its occurrence patterns and damage characteristics, so as to improve the level of control. So what medicine is most effective for the green stink bug? Let’s take a look below.

1. Characteristics of the damage caused by the green stink bug

The green stink bug is a pest of the Hemiptera order, Miridae family. It mainly damages the young and tender parts of fruit trees, such as young fruits, flower buds, young leaves and young shoots, with adults and nymphs. After the young leaves are damaged, small brown-red spots of varying sizes appear on the leaves at first, which gradually expand into holes of varying sizes. Later, the leaves will shrink and cannot be flattened, and photosynthesis will decrease. When the flower buds are damaged, small red spots will appear on the buds, causing them to fall off directly. When the young fruits are damaged, reddish-brown gelatinous substances will flow out of the damaged parts of the young fruits. Later, the damaged parts will become sunken or grow tumors or rust scars, and the fruit will lose its edible value. Causing serious production reduction. The green stink bug has a wide range of host plants and can harm dozens of crops including grapes, apples , pears, peaches, dates, pomegranates , cotton, and alfalfa.

2. Occurrence pattern of green stink bug

The green stink bug has 4 to 5 generations a year, and the first and second generations are harmful to orchard owners. The insect hibernates as eggs in the bark, branch crevices and bud scales of fruit trees. They begin to hatch into nymphs in spring when the average daily temperature is above 10°C. The first generation of nymphs feed on and damage the tender buds of the plants, while the second generation of nymphs are more harmful to the inflorescence and young fruits of grapes. The insect has the characteristic of changing its host to cause harm. The 3rd and 4th generation adults spread to weeds and nurseries outside the orchard to feed. In late September, the 5th generation adults begin to migrate back to the orchard to lay eggs and overwinter. Therefore, spring and autumn are the main periods when orchards are harmed, and are also the critical periods for prevention and control.

3. What medicine is most effective against green stink bugs?

1. Before the overwintering eggs of the green stink bug hatch in winter and spring, clean up the dead branches and leaves in the garden and the surrounding weeds in time, scrape off the old bark and apply whitewash for protection. A high humidity environment is conducive to the occurrence of this insect. We should avoid dense and humid conditions, improve the ventilation and light conditions of the orchard, reduce the humidity in the orchard in time during the rainy season, and pay attention to digging ditches for drainage.

2. Control by chemicals. Since the green stink bug has the habit of changing hosts and overlapping generations, seizing the critical period from early spring to before flowering to use pesticides is the key to improving the prevention and control of the green stink bug. Before bud break in early spring, spray 3 to 5 degrees Baume lime sulfur mixture in the orchard, and spray the main stems, branch forks, tree gaps and ground weeds. From budding to flowering stage, you can use chemical agents and compound agents such as 2000-2500 times solution of Decat, 4000-5000 times solution of Cool Leopard, 4000-5000 times solution of Liangfeng, 3000-4000 times solution of Wind Vane, 2000-3000 times solution of Scimitar for prevention and control. Spray again after an interval of 7-10 days. In the later stage, you can combine the monitoring situation and carry out prevention and control after the peak of adults appear. In July and August, in addition to the orchard, you should also spray the surrounding weeds and the ground. Pay attention to the rotation of the agents and the safe interval period.

That’s it