Methods for controlling葡萄二星叶蝉 (Grape Star Leafhopper)
For many girls, the introduction to the grape clinic, the method for controlling grape star leafhoppers, the following editor will introduce to the netizens.
The grape star leafhopper, also known as the two-spot leafhopper, is commonly called the small fierce insect or myna. It belongs to the Hemiptera order, Cicadellidae family. Its main hosts include grapes, apples, pears, and peaches, and in the Xi'an area, the harm to grapes starts to increase significantly in late June.
I. Damage Symptoms: This pest primarily harms by the adult and nymphs clustering on the back of grape leaves to suck the sap. Initially, the leaves show small chlorotic spots, which gradually expand into white patches. In severe cases, the spots merge, causing the entire leaf to become pale, withered, and premature defoliation, affecting the maturation of the branches and the differentiation of flower buds. In spring, the damage usually starts after the grape leaves unfold, with the overwintering adults laying eggs scattered on the back of the leaves, under the epidermis between the veins. The peak hatching period of the first generation of nymphs is from the full bloom to the initial fruit-setting stage, which is a critical period for control. This pest not only harms young leaves but also severely harms old leaves.
II. Control Methods: 1: In spring, when soil temperatures rise, thoroughly remove fallen leaves and withered grass, crush soil clumps, lightly rake the soil, and then spray a 5-degree Bordeaux mixture on the ground to reduce overwintering pest sources. 2. During the growing season, promptly prune branches, remove suckers, and weed to improve ventilation and lighting conditions. 3. Start timely spraying for pest control at the occurrence period of the first generation of nymphs (early to mid-June). When the pest population is large, you can spray 10% cypermethrin emulsion or 2.5% pyrethroid emulsion or 20% fenvalerate, all diluted in 5000 times water; 20% su灭威 emulsion diluted in 500 times water.
The above introduction to the methods for controlling grape star leafhoppers hopes to bring a little help to your life!