During the jointing stage of corn, it is a crucial period for its growth and development. This phase is essential for the proper growth of the plant and the normal differentiation of the tassel. Adequate watering and topdressing during this time are vital to ensure that the plants receive the necessary nutrients and moisture. In the large trumpet stage, which is a key growth phase, the soil should be kept consistently moist but not waterlogged. Maintaining a field water holding capacity of around 70% is ideal to support the plant's needs during this critical period.
Fertilization is also important during the large trumpet stage. Applying urea at a rate of 10-15 kg per acre is recommended. For dry land, the fertilizer should be applied before rainfall, while in irrigated fields, it should be applied after watering to ensure even distribution. The top dressing can be applied either in the middle of the plant or at the base. After irrigation, it is important to perform weeding and cultivation promptly. Combining fertilization with proper watering and timely hilling helps control weeds, retain moisture, and promote strong root development, all of which contribute to higher yields and better income.
In addition to nutrient management, pest control is another key concern during the jointing stage. Common pests include the corn borer, aphids, red spiders, and armyworms. To manage corn borers, a mixture of disulfoton granules and fine sand can be used, applied as a toxic soil treatment. The mixture should be prepared in a ratio of 1:50 and applied through irrigation, resulting in an effective control rate of up to 90%. Aphids and red spiders can be controlled using insecticides like Diquat or other suitable pesticides. For armyworms, spraying with 40% dimethoate diluted at a ratio of 1500-2000 times has proven to be very effective.
Proper attention to both cultural practices and pest management during the jointing stage ensures healthy plant development and sets the foundation for a successful harvest. Farmers should monitor their fields regularly and take timely action to address any issues that may arise. With careful management, corn crops can reach their full potential and produce high-quality yields.
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