A Complete Analysis of Common Wheat Diseases and Control Methods

Wheat is a traditional crop in China. During wheat cultivation, pest and disease infestations are often encountered, and these pests and diseases seriously affect the quality and yield of wheat, bringing huge economic losses to farmers. Understanding the characteristics of pests and diseases and their control methods is an important technique for achieving high and quality yields of wheat. Below, Qinong Web brings you the common pests and diseases of wheat and their control methods. Let's take a look.

1. Wheat powdery mildew

Wheat powdery mildew occurs from the seedling stage to the heading stage, mainly damaging wheat leaves, stems and ear parts. In the early stage of the disease, small white spots begin to appear on the leaves. As the disease develops, the small white spots gradually spread and become round white mold spots, and on the surface of the mold spots there is a layer of white powder. In the later stage, the mold spots turn into gray or brown disease spots and carry small black granular dots.

Control methods: Select varieties with strong disease resistance for planting. Before planting, deep plow the soil for disinfection to reduce the source of bacteria. The planting density should be reasonable and should not be too dense. In the early stage of the disease, spray with triadimefon, and promptly remove and clean up diseased leaves.

2. Wheat rust

Wheat rust mainly damages leaves, leaf sheaths, stems and ear parts. Depending on the affected part, it is called different names, such as leaf rust and stem rust, but the nature is the same. When the disease occurs, yellow or brown spore masses appear on the affected parts. These spores spread continuously through the air, spread quickly, and affect a very wide area. In the later stage, the color of the spore masses gradually turns black. It has a great impact on wheat, affecting the growth and development of wheat, making the grains shriveled and thin, and affecting yield and variety.

Control methods: Likewise, select varieties with strong disease resistance, and deep plow the soil for disinfection and sterilization before planting. In the early stage of the disease, spray with tebuconazole and diniconazole. When the disease is severe, in addition to spraying the affected wheat fields, also spray the surrounding areas together to prevent the disease from spreading.

3. Aphids

Aphids mainly suck the sap of leaves, stems and ear parts. After sucking, small yellow spots appear on the affected parts. As they slowly continue sucking, eventually the entire affected leaves, stems and ear parts gradually wither, and finally the whole plant dies. Their sap sucking affects the photosynthesis of wheat, causing poor nutrient transport in the plant, and ultimately making the grains shriveled and thin, affecting yield.

Control methods: Chemical spraying can use selective agents that are safe for natural enemies. This can both protect the natural enemies of aphids from harm and kill aphids. As aphids gradually decrease, until the ratio of natural enemies to wheat aphids is less than 1:150, then do not spray chemicals.

The above are the common wheat diseases and control methods brought to you by Qinong Web. Only by understanding the characteristics of wheat pests and diseases can you identify which pest or disease it is, and then prescribe the right remedy. Hope it can help you.