Recently, many fruit growers have given feedback to Sister Portugal that after the young leaves of the grapes are damaged, small red dots appear, and as the leaves grow, irregular holes are formed, and the leaves are atrophied and uneven, mutilated and deformed.
After the buds are affected, they stop developing and dry off, and the surface of the victim young fruit initially appears irregularly black.
The black spots turn brown and blackish brown, forming irregular scabs, and a few fruits crack at the scabs.
< h1 class = "pgc-h-arrow-right" > The Portuguese sister explains the green blind bug</h1>
Physical, chemical, control methods
<h1 class="pgc-h-arrow-right" >1. What is a green blind bug? </h1>
Green blind bugs belong to the order Hemiptera, a family of blind bugs, with three characteristics: wide distribution, mixed diet, and many hosts. Occurs 4 to 5 times a year
Prefers a warm, humid environment, and is prone to occur in large quantities when the temperature is 20 ~ 30 ° C and the relative humidity is 80 ~ 90%.
Green blind bugs are generally more infested after grape germination in early spring to the young fruit stage. Among them, the first generation of nymphs feeds on the buds of the grapes;
The second generation of nymphs is harmful to inflorescences, young fruits, etc.; at the beginning of the 3rd and 4th generations, due to the reduction of the young tissue of grapes, many green blind bugs choose to "go out to work";
In the 5th generation, they "returned to their hometown" and laid eggs for the winter.
In view of this situation, Sister Portugal tells you three ways to prevent and control green blind bugs!
<h1 class="pgc-h-arrow-right" > three methods for the prevention and control of green blind bugs</h1>
1. Physical prevention and control:
Before the grapes are buried in the soil to protect themselves from the cold, clean up the weeds and dead branches inside and outside the orchard, bury them deep or burn them intensively, and eliminate the eggs that overwinter on the weeds and dead branches.
The grapes are unearthed and put on the shelves before germination, scrape the old skin of the branches and burn them in a concentrated manner to eliminate the pests that overwinter in the cracks in the branches.
During the growing season, yellow plates or insecticidal lights can be hung in orchards to trap green blind bugs.
2. Chemical control:
Before germination, 3 to 5 baumedo stone sulfur compounds can be sprayed, including ground weeds, to eliminate overwintering eggs.
Germination to the new shoot leaf spreading stage, with high-efficiency cypermethrin, cyanopyridine + chlorpyrifos, etc., sprayed once every 7 to 10 days, and sprayed 3 times in serious orchards, which can effectively reduce the number of green blind bugs.
3. Biological control:
There are many natural enemies of green blind bugs, mainly egg parasitic bees, flower bugs, grasshoppers, cockroaches, spiders and so on.
Therefore, while carrying out chemical control, we must pay attention to protecting the natural enemies of green blind bugs, and try to use insecticides that are less toxic to natural enemies.