Characteristics of Grape Mite Pests
Are you aware of these? Here are some insights into the characteristics of grape mite pests in the context of green plants and flowers. Let's explore them together.
Characteristics of Grape Mite Pests
Grapes are a common fruit, cultivated in many regions. However, a type of pest found on grapes has caused significant trouble for growers, and that is the mite. It not only harms the grape's new shoots, petioles, leaves, fruit peduncles, clusters, and fruits but also poses a significant threat to other plants. What are the specific damages and how can we effectively prevent them? Let's find out.
Properties of Grape Mite Pests
1. Small population size, high numbers, rapid reproduction, and irregular distribution of affected spots.
2. Eggs, larvae, nymphs, and adults coexist, making it difficult to use targeted drugs.
3. In the middle and later stages, a web is formed, making it difficult to apply pesticides.
Symptoms of Grape Mite Pests
After the grape stem is damaged, the chlorophyll in the epidermis is absorbed, changing the color from green to brown and then to black. The tender stem becomes brittle and is prone to breakage or falling off. In the early stage of fruit development, light brown rust spots appear, the fruit surface becomes rough, and severe damage can cause stiffness and deformation.
When the leaves are juiced, white spots are formed. As the leaves grow, the grayish-white down gradually darkens, forming a tea-brown or even dark brown color. In the later stage, the spots gradually deform and become uneven.
When the bud is damaged, the mite absorbs the juice from the base of the bud, causing the branch to flatten, the base internode to become short or the side buds to cluster, and the leaves to shrink. If severe, it can bore into the deeper part of the bud to feed on the bud primordium, leading to the death of overwintering buds.
Control of Grape Mite Pests
1. Before hatching, eggs can be killed with aniline or nislon. Killing the eggs before the adults hatch is very important. For gardens severely affected by mites last year, the old bark can be peeled off to expose the eggs, making it easier to spray. The main framework can be painted white.
2. After the new shoots mature, a miticide with high safety can be sprayed throughout the garden. At this time, we can use pyrazoline or spiroclofen, which are effective against mite eggs and young mites, and avermectin, which is effective against mites throughout their lifecycle. The choice of pesticide varies with different stages.
3. After harvest, early-maturing varieties can be sprayed with miticides without worrying about drug harm and food safety, while late-maturing varieties do not need to be sprayed.
In fact, under general conditions, grape mites can be prevented every three years. Once detected, they can be controlled for two years. Open葡萄 (grapevines) depend on whether there are owners nearby. For this type of pest, we must take good preventive and control measures.
The above is some information about the characteristics of grape mite pests, hoping it is helpful to you!