Sorghum is an important crop in many parts of the world, and is used for both food and animal feed. However, it is susceptible to attack by a number of pests, including stalk borers and cutworms. These insects can cause significant damage to sorghum crops, reducing yields and affecting quality. In this article, we will look at some methods for controlling stalk borer and cutworm attacks on sorghum crops.
Stalk borers are insidious pests that attack sorghum plants by tunneling into their stems. They usually attack young plants, and as they grow, the damage they cause becomes more severe. Symptoms of stalk borer infestation include wilting, stunting, and yellowing of the leaves. If the infestation is severe, the plants may even die.
One way to control stalk borers is to remove any weed hosts near the sorghum field, as these can serve as a source of infestation. It is also important to promptly remove and destroy any infested plant material. This will help to reduce the population of stalk borers in the area.
Another effective method for controlling stalk borers is to use insecticides. There are several insecticides that are effective against stalk borers, and they should be applied early in the season, when the threat of infestation is highest. However, it is important to follow the instructions carefully, as some insecticides may be harmful to beneficial insects or pose risks to human health.
Cutworms are another pest that can attack sorghum crops. Cutworms are larval forms of certain species of moths, and they feed on the stems and leaves of young plants. They usually attack at night, and symptoms of a cutworm infestation include wilting, stunting, and holes in the leaves.
One way to control cutworms is to apply a granular insecticide to the soil around the base of the plants. This will kill any cutworms that try to feed on the sorghum plants. It is important to apply the insecticide early in the season, before the cutworms have a chance to cause significant damage.
Another effective method for controlling cutworms is to use physical barriers. In some cases, placing a cardboard collar around the base of the plant can prevent cutworms from crawling up the stem and feeding on the leaves. This is a simple and effective method that can be used in conjunction with other control measures.
In conclusion, stalk borer and cutworm attacks can cause significant damage to sorghum crops. However, there are several methods that can be used to control these pests, including removing weed hosts, destroying infested plant material, using insecticides, and using physical barriers. By taking these steps, growers can help to protect their sorghum crops and ensure a successful harvest.