Common Cotton Pests and Diseases and the Latest Control Methods
Our country is a major cotton-producing country. Everyone knows that we cannot do without cotton in our daily lives; it is mainly used to make all kinds of clothing and many household items. However, during cotton cultivation, many diseases and pests can cause trouble, and these diseases and pests can affect the quality and yield of cotton. Below, Qinong Web brings you the common cotton pests and diseases and their control methods.
1. Cotton Fusarium Wilt
Cotton Fusarium wilt is the most common and most important disease of cotton. It occurs all over the world and causes serious harm to cotton production, resulting in relatively large losses. Cotton Fusarium wilt mainly harms cotton seedlings. When the disease occurs, it has multiple forms: some leaves develop yellow vein networks and eventually wither, while some leaves turn yellow or purple, but in the end all the leaves wither and the plant dies.
Control methods: The pathogen of Fusarium wilt can safely overwinter in soil and fertilizer, and continues to spread to new plants the following year, so before planting, seeds, soil, fertilizer, and so on must be disinfected and sterilized. Carry out rational close planting and fertilization. In the early stage of the disease, carbendazim can be diluted and used to drench the roots or sprayed.
2. Cotton Verticillium Wilt
Cotton Verticillium wilt differs from Fusarium wilt by only one character. From the name, we can tell that when cotton Verticillium wilt occurs, the leaves lose water and yellow patches appear on the leaves. As the disease spreads, the diseased spots gradually expand. After long-term drought followed by heavy rain, the leaves suddenly wilt and then fall off.
Control methods: Choose varieties with relatively strong disease resistance, avoid continuous cropping, and preferably rotate with other crops, which can reduce the occurrence of the disease. During the squaring stage, spray growth regulators such as mepiquat chloride, and regularly spray agents such as mancozeb or thiophanate-methyl • thiram, which have a preventive effect.
3. Cotton Aphids
Cotton aphids mainly harm cotton seedlings. The aphids suck the sap from seedling leaves, causing the seedling leaves to curl, which prevents normal growth and development, affects the flowering and boll stages, and causes late maturity and reduced yield.
Control methods: Use insecticides that cause relatively little harm to the plants for spraying and killing.
4. Cotton Bollworms
Cotton bollworms mainly harm cotton during the bud and boll stage. Cotton bollworms chew on cotton buds, flowers and bolls, and tender stems, causing phenomena such as failed flowering, bract shedding, and rotten bolls, ultimately affecting the quality and yield of cotton.
Control methods: Likewise, use insecticides that cause relatively little harm to the plants for spraying and killing.
The above are the common cotton pests and diseases and control methods brought to you by Qinong Web. We hope this article is helpful to friends who grow cotton or want to grow cotton. Preventing cotton pests and diseases is the key point in achieving high and excellent cotton yields.