Causes of falling flowers and pods of broad bean and its control measures

Broad bean, also known as Nandou and Fodou, is a crop of vegetables, grain and feed green manure, which is widely planted in many areas, but there are a large number of flowers and pods when planting, which affects the yield of broad bean and the economy of farmers. In order to achieve the high yield of broad bean, falling flowers and pods must be solved. Let's take a look at the detailed introduction of the pro-agricultural network.

1. Reasons for falling flowers and pods

Climatic factors: during the flowering and podding period of broad bean, if you encounter overcast and rainy weather, it will lead to pollen dysplasia, or directly affect pollination, resulting in falling flowers and pods.

Nutritional deficiencies: inadequate nutrition during broad bean growth, such as lack of nitrogen, phosphorus, potassium and boron, or excessive application of nitrogen fertilizer during fertilization can lead to flowers and pods.

Soil stagnant water: excessive soil water or high humidity during planting will lead to poor soil permeability, hindered root growth, lack of oxygen, can not normally transport nutrients and water, and will fall flowers and pods for a long time, or even normal plant death.

Excessive growth: the plant appears the phenomenon of overgrowth, with high stems and dense leaves, resulting in poor ventilation and light transmittance, resulting in falling flowers and pods.

Diseases and insect pests: many diseases and insect pests of broad bean will cause falling flowers and pods, such as diseases such as rust, red blight and Fusarium wilt, and pests such as aphids.

2. prevention and control measures

In view of the above causes of broad bean falling flowers and pods, we need to "prescribe the right medicine to the case", the best prevention and control measures.

Rational fertilization: broad bean needs different nutrients in each growth stage, mainly nitrogen fertilizer before growth, to the middle growth stage, topdressing phosphorus and potassium fertilizer to improve disease resistance, in the budding and flowering stage, foliar fertilizer can be properly sprayed according to plant growth status, resulting in podding stage, supplementary application of boron fertilizer to increase yield.

Drainage and waterlogging prevention: drainage and waterlogging prevention measures should be taken during planting, especially in overcast and rainy seasons, ditches should be dug in time to reduce groundwater level and soil moisture, and ensure the normal growth of plant roots.

Pruning and topping: when the plant is overgrowing, pruning and topping in time, especially in the flowering and scab stage, cut off some empty branches without flowers and pods, freeze-damaged branches, susceptible branches and some weak branches to improve the ventilation and light transmittance of the plant. In addition, topping is to cut off the young stems and leaves at the top of the plant, which can control the plant height and reduce the consumption of nutrients.

Pest control: broad bean diseases are mainly caused by rust, Fusarium wilt and Fusarium wilt. They can be sprayed with 600x solution of 60% Fangmaibao wettable powder, 800x solution of 70% methyl thiophanate wettable powder and 1000 times of 40% Hekuling wettable powder, respectively. Insect pests can also be controlled with insecticides.

The reasons and control measures of broad bean falling flowers and pods brought by the above pro-agricultural network hope to help you. If you want to know more about broad bean planting, please pay attention to the pro-agricultural network.