Common diseases of cotton bolls and control methods for cotton boll blackening

Do you know what diseases can occur during cotton cultivation? Below we introduce the most common cotton boll blackening disease. Do you know this disease? What do the symptoms of this disease look like on cotton? What are the control methods? Let's take a look together.

Symptoms: infected cotton bolls first become dark brown and rotted, gradually dry out and harden, and produce many small black spots on the boll and release black powdery material.

Control methods - seed disinfection:

1. After cotton harvest: gin the seed cotton immediately, and apply methyl bromide for fumigation and disinfection. For every 1,000 cubic feet, apply two pounds of methyl bromide, which can fumigate 4,000-5,000 kg of cottonseed. The fumigation time is 16 to 24 hours, to kill the pink bollworm latent in the cottonseed.

2. Before sowing: for one kilogram of cottonseed, add eight grams of 65% dichloromethoxybenzene wettable powder, add about fifteen milliliters of clean water, stir evenly, and sow after drying in the shade.
Now that you are clear about the symptoms and control methods of this cotton disease, you will know what to do in the future during cotton cultivation.