Hebei Cotton Seedling Management Technical Advice
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August 18 07:05:51, 2025
Editor's Note: Currently, cotton in Hebei Province is gradually entering the seedling stage. To ensure effective management of cotton seedlings, the Provincial Department of Agriculture organized the provincial cotton expert advisory group to conduct field inspections in Fujian, Xingtai, Hengshui, and Quzhou. Due to recent abnormal weather conditions—prolonged rain and low temperatures—cotton emergence has been affected. After on-site analysis and consultations, the team issued the "Technical Opinions on Cotton Seedling Management in Hebei Province in 2008," which is now being released for prompt dissemination.
At present, Hebei Province is transitioning from southern to northern regions into the seedling phase. Field inspections show that this year’s cotton planting base is strong, with better emergence compared to previous years. Over 85% of the cotton fields have already developed seedlings. However, due to frequent rainfall and low temperatures, some areas experienced poor germination, leading to weak, small, and uneven seedlings. Diseases such as blight and anthracnose are more prevalent than usual, and some fields have also seen an increase in locust infestations.
In response to the current weather conditions and the state of cotton seedlings, it is recommended to implement the following technical measures based on local conditions, targeted guidance, and scientific management to cultivate healthy and robust seedlings:
First, check the seedlings and fill in gaps. If there are severe deficiencies, transplanting should be done immediately to ensure uniform growth. For areas with no more than three consecutive missing plants, two plants can be retained or leaf shoots (cramps) can be used to fill in the gaps.
Second, loosen the soil to increase ground temperature. Especially after rain, timely cultivation helps break up compacted soil, raise temperatures, and reduce the occurrence of seedling diseases. The depth of cultivation should not exceed 5 cm.
Third, thin out the seedlings and nurture strong ones. In areas with dense planting and thick emergence, thinning should be done when the first true leaf appears. Weak seedlings should be removed to prevent tall, leggy growth. Considering the low temperatures in May, it is advisable to delay the thinning process until the third true leaf stage.
Fourth, take multiple measures to prevent and control pests and diseases. Combine agronomic practices with chemical treatments to manage outbreaks effectively. For blight and anthracnose, improve soil temperature through practices like cultivating stalks to help diseased seedlings recover. Monitor closely for locusts, thrips, and other pests. When the rolling leaf rate reaches 5%, apply chemical control using 10% emamectin benzoate at a rate of 15–20 grams per acre, applying twice with a 7-day interval.
Fifth, remove the mulch film promptly. This promotes root development and improves soil moisture. It is recommended to remove the film in mid-June using a late removal method, but it should be done after the final determination in May. Plan ahead to promote strong seedling growth.
Sixth, use scientific growth regulation. For weak cotton fields, avoid chemical treatments during the seedling stage. In areas with heavy rainfall and rapid waterlogging, to prevent tall and elongated seedlings, promote root development by spraying foliar growth regulators at a rate of no more than 0.5 grams per acre. The principle is to spray sparingly, not excessively.