The latest common diseases and insect pests of corn and their control methods

Corn is a common crop, and it is also the main source of income for many farmers, and diseases and insect pests are one of the major reasons that affect the yield of corn. The following pro-agricultural network in order to bring common diseases and insects of corn, and bring their characteristics and control methods, let's learn about it.

1. Large and small spot

The leaf blight mainly harms the leaves, and the bracts can be dangerous when it is serious. At the beginning of the disease, it is a small bluish gray spot, and then it spreads gradually. The whole leaf is covered with large irregular spots with black mildew. Leaf spot is harmful to leaves and stems, and oval or rectangular spots appear at the time of onset, which can be prevented and eradicated by amoxeta dilution spray.

2. Bacterial wilt

Ralstonia solanacearum does great harm to corn, frequently occurring in the jointing stage of corn, it is not easy to die, it will make the whole plant wilt and die, peel off the stem, you will find that the pith inside turns brown. Because it is not easy to detect, but can be prevented, it can be filled with professional medicine.

3. Rust

Rust mainly harms the leaves. In the early stage of the disease, there are round disease spots in the leaves, accompanied by rust-colored powder, and spores will grow on the disease spots in the later stage. These spores can survive the winter safely, and will be infected again in the coming year, and gradually expand, causing great harm. The hybrid varieties with strong disease resistance were selected and fertilized rationally. at the initial stage of the disease, the disease was diluted with vermicellin wettable powder and sprayed repeatedly.

4. Iron beetle

The iron beetle shell is hard and lurks in the leaves, gnawing the mesophyll clean, causing the leaves to die. When the number of iron beetles is large, it will cause the leaves to die in a large area. Chemical agents and artificial control can be adopted to combine and control, and chemicals should be sprayed with pollution-free pesticides as far as possible to cut and burn the leaves damaged by iron beetles.

5. Borer

Borer, also known as drillworm, is the main pest of corn, which often nibbles into the stems and leaves of corn, destroying stem and leaf tissue, so that corn nutrients can not be transported, affecting the growth of corn, and the whole plant dies in serious cases. Use professional insecticides or spray to kill insects.

The above are the common corn diseases and insect pests and their control methods brought to you by the pro-agricultural network. There are many diseases and insect pests in corn. This article only brings a few of the more common ones. I hope I can help you.