Symptoms and control methods of lavender wilt disease

Lavender is not only a common flowering plant, but also a natural spice plant, but in the process of cultivation, lavender wilt occurs in different areas, especially in the seedling stage, and often dies in lots. Xi'an in Shaanxi Province and Jun County in Henan Province have occurred.

Lavender

First, disease symptoms: the annual sowing seedlings or cutting seedlings first appeared wilting, water loss, dark leaf color, and the top of the leaves and branches bent and drooped, which was the most obvious in the budding stage. The light ones can recover at night, and the severe ones die in two or three days, the roots rot, and the stem ducts turn brown and show luster. The wilting symptoms of more than three-year-old seedlings appeared in the center or edge of the plant, gradually developed inward and outward, the branches wilted and died, and finally the whole plant died. the damage degree varied with plant age and variety. It usually begins in May and reaches its peak in July and August. The disease of lavender in France is serious, while that of 2mur417 in the former Soviet Union is mild.

The disease is not only related to air temperature and precipitation, but also to topography and drainage. Especially after the rainstorm in summer, the performance is the most prominent, and the dead seedlings are serious. More than 10% of the mild cases and more than 90% of the severe ones died.

2. Field pesticide test: the control effect of "920" is about 15.5%, the control effect of benzoylammonium is about 13.3%, the control effect of methyl topiramate is about 2.6%, the control effect of ethyl topiramate is about 26%, the control effect of antibiotic 500 ppm is about 23%, the control effect of 300 ppm is 82%, the control effect of 200 ppm is 79%, and the control effect of 100 ppm is 89%. It is suggested that the management of cultivation should be strengthened, disease-resistant varieties should be selected, field cultivation should be carried out, cultivated in sandy soil, and more phosphorus and potassium fertilizer should be applied to enhance resistance. At the same time, we can also refer to the control methods of Fusarium wilt of crops such as watermelon, cotton, peanut and so on.

Symptoms and control methods of lavender wilt disease

[symptoms] when the annual sowing or cutting seedlings were injured, the plant wilted, lost water, the leaf color was dim, and the top of the leaf branch bent and sagged, which was the most obvious in the budding stage. The light ones can recover at night, and the severe ones die in two or three days, the roots rot, and the stem ducts turn brown and show luster. The wilting symptoms of more than three-year-old seedlings appeared in the center or edge of the plant, gradually developed inward and outward, the branches wilted and died, and finally the whole plant died. the damage degree varied with plant age and variety. It usually begins in May and reaches its peak in July and August. The disease of lavender in France is serious, while that of 2mur417 in the former Soviet Union is mild. The disease is not only related to air temperature and precipitation, but also to topography and drainage. Especially after the rainstorm in summer, the performance is the most prominent, and the dead seedlings are serious. More than 10% of the mild cases and more than 90% of the severe ones died.

[control method] the control effect of "920" is about 15.5%, the control effect of benzoylammonium is about 13.3%, the control effect of methyl topiramate is about 2.6%, the control effect of ethyl topiramate is about 26%, the control effect of antibiotic 500ppm is about 23%, the control effect of 300ppm is 82%, the control effect of 200 ppm is 79%, and the control effect of 100 ppm is 89%, but the effect of root filling is not good. It is suggested that the management of cultivation should be strengthened, disease-resistant varieties should be selected, field cultivation should be carried out, cultivated in sandy soil, and more phosphorus and potassium fertilizer should be applied to enhance resistance. At the same time, we can also refer to the control methods of Fusarium wilt of crops such as watermelon, cotton, peanut and so on.

Lavender wilt disease prevention and control methods lavender is a natural spice plant, but also an ornamental flower, there is a destructive disease wilt disease in planting, there is no detailed report in China, the author has carried out prevention and control work, now the prevention and control methods are introduced as follows:

Lavender wilt occurred in plantations in different cultivation areas, especially in the seedling stage, and often died in lots, including Xi'an in Shaanxi Province and Junxian County in Henan Province. The main results are as follows: 1. The annual seeding or cutting seedlings with disease symptoms first appear wilting, water loss, dark leaf color, and the top of the leaves and branches bend and droop, which is the most obvious in the budding stage. The light ones can recover at night, and the severe ones die in two or three days, the roots rot, and the stem ducts turn brown and show luster. The wilting symptoms of more than three-year-old seedlings appeared in the center or edge of the plant, gradually developed inward and outward, the branches wilted and died, and finally the whole plant died. the damage degree varied with plant age and variety. It usually begins in May and reaches its peak in July and August. The disease of lavender in France is serious, while that of 2mur417 in the former Soviet Union is mild. The disease is not only related to air temperature and precipitation, but also to topography and drainage. Especially after the rainstorm in summer, the performance is the most prominent, and the dead seedlings are serious. More than 10% of the mild cases and more than 90% of the severe ones died. 2. In the field pesticide test, the control effect of "920" is about 15.5%, the control effect of benzoylammonium is about 13.3%, the control effect of methyl topiramate is about 2.6%, the control effect of ethyl topiramate is about 26%, the control effect of 500ppm with antibiotics is about 23%, the control effect of 300ppm is 82%, the control effect of 200 ppm is 79%, and the control effect of 100ppm is 89%, but the effect of root irrigation is not good. It is suggested that the management of cultivation should be strengthened, disease-resistant varieties should be selected, field cultivation should be carried out, cultivated in sandy soil, and more phosphorus and potassium fertilizer should be applied to enhance resistance. At the same time, we can also refer to the control methods of Fusarium wilt of crops such as watermelon, cotton, peanut and so on.