Lavender Wilt Disease Control
The editor answers related experiences of lavender in the flower clinic for netizens, discussing lavender wilt disease control. Next, the editor will introduce the topic.
Lavender is a natural spice plant and also an ornamental flower. A devastating disease called wilt occurs in its cultivation. There have been no detailed reports in China. The author has conducted control work and now introduces the control methods as follows: content from
Lavender wilt disease occurs in plantations in different cultivation areas, especially prominent in the seedling stage, often with large areas of death. It has occurred in Xi'an, Shaanxi, and Xunxian County, Henan.
When annual seedlings or cuttings are affected, the plant first shows symptoms of wilting, dehydration, and dull leaf color. The tops of leaves and branches bend downward, most noticeable during the budding stage. Mild cases can recover at night, while severe cases die within two to three days, with root rot and stem vessels turning brown and becoming glossy. For plants over three years old, in addition to the symptoms similar to seedlings, wilt symptoms appear in the center or edges of the plant, gradually spreading inward and outward, with branches withering and dying, eventually leading to the death of the entire plant. The degree of harm varies with plant age and variety. Generally, it starts in May and peaks in July and August. French lavender is severely affected, while the Soviet 2-417 variety is less affected. The disease not only relates to temperature and precipitation but also to terrain elevation and drainage conditions. It is particularly prominent after summer heavy rains, with severe seedling death. Mild cases have around 10-15% death, while severe cases can exceed 90%.
II. Field Fungicide Trials
"Jiuzheng-20" has an efficacy of about 15.5%, zinc omethoate has an efficacy of about 13.3%, thiophanate-methyl has an efficacy of about 2.6%, ethyl thiophanate has an efficacy of about 26%, antibiotics at 500 ppm have an efficacy of about 23%, 300 ppm have an efficacy of 82%, 200 ppm have an efficacy of 79%, and 100 ppm have an efficacy of 89%, but the root irrigation effect is not good.
It is recommended to strengthen cultivation management, select disease-resistant varieties, implement field ridging, cultivate in sandy soil, apply more phosphorus and potassium fertilizers to enhance resistance. Reference can also be made to the control methods for wilt diseases in crops such as watermelon, cotton, and peanuts.
The above is the experience and knowledge of lavender wilt disease control. I hope this article can provide you with some help!