Corn Pest and Disease Control Methods and High-Yield Planting Techniques

How to control diseases in corn cultivation? Corn is a key crop in our country. When planting corn, growers should grasp more technical knowledge points, choose the most suitable cultivation method according to local conditions, and also do a good job in corn disease control, etc. Next, the editor will briefly talk about high-yield corn cultivation techniques, hoping to be of some help to everyone.

1 High-yield corn planting techniques

1.1 Variety selection

Select high-quality local varieties, such as Jindan No. 33, No. 34, No. 35, No. 36 and No. 472, as the key varieties.

1.2 Land preparation

Choose flat terrain, fertile soil and good drainage and irrigation conditions for planting. Before planting, carry out deep plowing and turning of the land, and immediately replenish moisture to the soil after leveling it.

1.3 Planting method 

The use of mechanical planting should be combined with characteristic planting techniques and plastic film mulching, which can both increase ground temperature and meet the needs of corn growth, preventing soil moisture loss.

1.4 Scientific fertilization

1.4.1 Fertilization principles: heavy application of base fertilizer, light application of seedling fertilizer, and skillful application of fertilizer.

1.4.2 Corn fertilization needs to take into account the characteristics of the variety, index values and the specific soil conditions, implement deep fertilization techniques, and apply base fertilizer, potassium fertilizer and phosphate fertilizer in a special ratio in one application into the soil.

1.4.3 Before the seeds germinate and sprout, choose windless or low-wind weather to spray an appropriate amount of chemicals.

2 Pest and disease control techniques

2.1 Corn borer control

When corn borers appear during the whorl stage of corn growth, a 1.5% phoxim granular liquid can be prepared and 1-2 kg per mu can be used for spraying control. After corn enters the booting stage, deltamethrin emulsifiable concentrate can be used for control, or the technique of dipping and dropping the silks can be used for control.

2.2 Corn rust control

2.2.1 Select hybrid varieties with strong disease resistance and plant them at a reasonable density.

2.2.2 Improve fertilizer and water management methods to enhance the disease resistance of corn plants.

2.2.3 Ensure the water needed for corn growth.

2.2.4 Increase the release amount of potassium fertilizer.

2.2.5 Carry out chemical seed dressing treatment before corn planting.

2.3 Northern corn leaf blight and southern corn leaf blight control

2.3.1 Physical method: clean up diseased corn residues thoroughly.

2.3.2 Chemical method: use 50% triadimefon wettable powder, prepare it into a 500-fold liquid for spraying control.

2.3.3 Use 70% thiophanate-methyl wettable powder and 75% chlorothalonil wettable powder to prepare 600-fold and 700-fold liquids, and spray continuously 2-3 times.