Control methods of diseases and insect pests of broad bean

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

1, red spot disease

Temperature and humidity in the field have great influence on the disease, which mainly occurs in the flowering stage of Vicia faba, and occurs in high planting density, poor drainage and soil nutrient deficiency. When the disease occurs, multiple disease spots appear on the leaves, gradually expanding, the disease spots are red, so that the function of the leaves decreases, the synthetic nutrients decrease, resulting in poor plant growth.

Control methods: select varieties with strong disease resistance, plant them closely, control the application of nitrogen fertilizer, rotate them with gramineous crops for more than 2 years, clean up the sick bodies in time after harvest, bury them deeply or burn them.

2. blight

Fusarium wilt is a common disease in broad bean. It can harm broad bean only from seedling stage to flowering stage. When it occurs, the leaves are pale yellow and withered, the top leaves are withered and green in summer, the leaves will fall off, the roots will be black, the lateral roots will be few, and the roots will be managed when it is serious. It is easy to pull up.

Control method: before sowing, use carbendazim solution to soak seeds for disinfection. In the early stage of disease, carbendazim, propiconazole EC, thiabendazole and other chemicals can be used to irrigate roots, and the effect is better.

3. Virus disease

The disease mainly damages the mosaic parts of plants, and the bright veins appear after the leaves are infected. It is mainly transmitted by aphids and seeds. The seeds with virus and aphids with virus are the main sources of infestation. When the disease occurs, the leaves shrink. If burned, they lose photosynthesis and cannot synthesize nutrients.

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

4. Aphids

Aphids have strong fecundity and can reproduce more than ten times a year. Generally, adults and larvae will gather at the tender leaves of the top tips of broad beans and absorb sap, which makes broad beans grow slowly, and at the same time can spread viruses and reduce yield.

Prevention and control methods: for aphid control early, as far as possible before the harm to eliminate it, control agents have lesben emulsifiable concentrate, imidacloprid and so on have direct, you can choose any one, spray every 7-10 days, 2-3 times in a row.

The above is a broad bean pest control methods introduced, I hope to help you, want to know more about the relevant knowledge, please pay attention to us.