Diseases and insect pests of broad bean trees and their control methods, prevention and control of broad bean aphids

Broad bean is one of the earliest legume crops cultivated by human beans. when planting, many growers do not pay attention to the diseases and insect pests of broad bean, which leads to a serious reduction in the yield of broad bean, which occurs year after year in some areas. So how to control broad bean diseases and insect pests? Let's take a look at the detailed introduction.

1. Red spot

The temperature and humidity in the field have a great influence on the disease, which mainly occurs in the flowering stage of broad bean, and can be caused by high planting density, poor drainage and soil deficiency. During the onset of the disease, there are many disease spots in the leaves, which gradually expand, and the disease spots are red, which leads to the decline of leaf function and the decrease of synthetic nutrients, resulting in poor plant growth.

Control methods: select varieties with strong disease resistance, properly close planting, control the application of nitrogen fertilizer, and rotation of Gramineae crops for more than 2 years, clean up the disease and debris in time after harvest, deeply bury or burn.

2. Fusarium wilt

Fusarium wilt is a common disease of broad bean, which can be harmed only at the flowering stage from the seedling stage. When the disease occurs, the leaves are yellowish and withered, the top leaves are wilted and summer green, the leaves will fall off, the roots will blacken, and the lateral roots will be less, and the roots will be managed in serious cases. It is very easy to pull up.

Control method: soak the seeds with carbendazim solution before sowing. At the initial stage of the disease, carbendazim, propiconazole EC, thiabendazole and other agents can be used to fill the roots, and the effect is better.

3. Virus disease

The disease mainly harms the mosaic part of the plant, and the bright pulse phenomenon appears after the leaf is infected, which is mainly transmitted by aphids and seeds. When the disease occurs, the leaves shrink, like burns, lose photosynthesis and cannot synthesize nutrients.

Prevention and control methods: select seeds that do not carry the virus for sowing, disinfect the seeds and seedlings when planting, and control aphids at the same time to avoid spreading the disease.

4. Aphids

Aphids have a strong fecundity and can reproduce more than ten times a year. Generally, adults and larvae gather in the tender leaves of the top tip of broad bean to absorb juice, which makes broad bean grow slowly, and at the same time, it can spread virus and reduce yield.

Control methods: control aphids early, try to eliminate them before the harm, the control agents are Lesbon EC, imidacloprid and so on directly, you can choose one, spray every 7-10 days, 2-3 times in a row.

The above is the introduction of broad bean pest control methods, hope to help you, want to know more related knowledge, please pay attention to us.