Control methods of diseases and insect pests in Jufeng grape

Jufeng grape is one of the main varieties in production, with strong adaptability, good disease resistance and cold resistance, and likes fertilizer and water. It was introduced into China in 1959 and popularized in a large area all over the country. It has become a major variety welcomed by fruit growers. Let's take a look at the control methods of diseases and insect pests of Jufeng grape.

1. Downy mildew: the disease is more serious in areas with less wind, foggy, dewy and rainy in spring and autumn. Can choose the internal absorption agent control, such as: Jinyi cream, metalaxyl, flumorph, aldicarb, metalaxyl and so on.

2. Anthracnose: mainly harms nearly mature fruits, so it is also known as "late rot" pathogen, infecting fruit stalks and ear rachis, and the tip of the ear near the ground is the first to cause the disease. The pathogen is mainly the mycelium overwintering in the annual branches of the tree. It spread heavily with wind and rain the following spring.

3. White rot: grape white rot, commonly known as "water rot" or "ear rot", is an important pathogen that often occurs. Generally, high temperature and rain are conducive to the prevalence of the disease, and anthracnose is often prevalent in rainy years, resulting in great losses. The occurrence of white rot is closely related to Rain Water. The rainy season comes early, the disease occurs early, the rainy season comes late, the disease occurs late. After the occurrence of this disease in the orchard, there is often a peak of the disease every time it rains. Combined with the prevention and treatment of anthrax.

4. Black pox: rainy and high humidity are important conditions for the occurrence and prevalence of the disease. Rainy and high humidity are beneficial to the formation, transmission, germination and infection of conidia, especially when the plant is young, the disease will occur seriously in rainy and humid weather.

5. Botrytis cinerea: Botrytis cinerea is an important disease that seriously affects the growth and storage of grapes. Spring is the main disease that causes flower ear rot, and the damage rate of flower ear of susceptible varieties is more than 70%. Ripe fruits often rot during storage, transportation and sale. It is a disease that must be controlled before and after flowering, especially before flowering.

6. Green bug bug: it belongs to Hemiptera Pentatomidae, alias mosaic bug, small bedbug and so on. Damage after germination, orchards harmed by green bug bugs (as long as it is after germination), the earlier the better.

7. Beetles: the larvae of the beetles, called grubs, live in the soil and are the main underground pests. They eat the roots and stems of the seedlings, resulting in slow growth or broken roots. The adults of the beetles eat the grape fruit, which not only affects the fruit growth and reduces the yield, but also affects the quality of the grapes.

8. Jumping beetles: adults eat leaves, and young beetles harm leaves before eating roots and flowers.

9. Red spider: grape red spider is one of the pests that threaten grape production. Because of its overlapping generations, it can do harm to the whole growing period, resulting in early defoliation of grapes, poor coloring of berries, low sugar content, declining quality, and even non-ripening, resulting in general fruit drop, substantial reduction in yield, poor ripening of new shoots and susceptibility to freezing injury.