Heat and Waterlogging Weigh on Cotton Seedling Vigor in June, Pressuring New Crop Yield Outlook

The June seedling data for the 2026 cotton crop has cast a shadow over the new season's yield outlook. According to a June survey by the China Cotton Association covering 1,904 fixed households across 10 provinces and the Xinjiang Autonomous Region, the national cotton squaring rate reached 98.7% as of June 30, unchanged from last year. However, seedling vigor ratings showed the most significant deterioration in three years: only 26.4% of surveyed farmers reported good growth, a sharp drop of 17.7 percentage points year-on-year. For textile buyers, this signals greater uncertainty in quality grading and cost structures for the upcoming harvest.

Regional Divergence: Xinjiang Heat and Yangtze Waterlogging as Major Drags

Xinjiang, the largest cotton-producing region in China, saw frequent high temperatures in June directly impacting reproductive growth. Survey data show that the number of bolls per plant in Xinjiang was lower than in previous years, with some bolls shedding due to heat stress; plant height and fruit branch count also fell short of last year's levels. Only 22.9% of Xinjiang farmers rated seedling growth as good, down 19.7 percentage points year-on-year. Notably, while disease pressure remained relatively light, insect infestation intensified due to heat, with 50.5% of fields experiencing severe damage, primarily from aphids and spider mites. The heat risk persists in July, with widespread high temperatures expected and below-normal rainfall, threatening boll and flower development and directly impacting final yields.

The Yangtze River basin faced equally challenging conditions. Multiple rounds of heavy rainfall in June led to insufficient sunlight and waterlogging in low-lying fields, causing increased boll shedding and slower overall growth. The squaring rate in this basin was 76%, down 2.2 percentage points year-on-year, and only 45% of farmers reported good seedling growth, a decline of 18.4 percentage points. The proportion of fields with poor seedling conditions rose to 30.3%, up 12.7 percentage points. For downstream spinning mills, fiber length and maturity from this region may suffer, potentially disrupting high-count yarn blending strategies.

The Yellow River basin was the sole bright spot in June. Favorable light and temperature conditions, along with timely rainfall that alleviated drought stress, supported robust growth. The squaring rate reached 88.3%, up 1.4 percentage points year-on-year, and 68.3% of farmers rated seedling growth as good, a 17.7 percentage point improvement. Pest and disease pressure were both lighter than last year, with only 24.2% of fields experiencing heavy insect damage. This region's strong performance may partially offset losses from Xinjiang and the Yangtze basin.

Pest Pressure Intensifies, Raising Input Costs

Nationwide, pest and disease pressure was significantly heavier than last year. The proportion of fields with mild disease incidence fell to 70.2%, down 19.4 percentage points year-on-year. For insect pests, only 28.9% of fields reported mild infestation, a drop of 20.9 percentage points, while 47.1% of fields experienced severe infestation, up 4.2 percentage points. This means cotton farmers will face higher plant protection costs in the coming boll-setting period. If not controlled in time, boll weight and lint percentage could decline. For cotton traders, this could lead to greater variability in impurity rates and uniformity indices, requiring adjustments to procurement specifications.

July Weather as Key Variable, Yield Forecasts Likely to Be Revised Down

July is a critical period for cotton yield formation, and the heat risk in Xinjiang remains elevated. The China Cotton Association recommends that farmers use frequent low-volume drip irrigation to mitigate heat stress and improve field ventilation. Historically, when temperatures exceed 35°C without effective rainfall, boll shedding rates can exceed 30%. If July weather does not improve significantly, the 2026 national cotton yield will likely fall below last year's level. Based on June seedling data, industry analysts may reduce Xinjiang yield forecasts by 5-10% within the next two weeks.

For Buyers - Monitor Xinjiang's July weather and topping progress; if heat persists, consider locking in forward contracts for high-grade cotton early to avoid supply-driven premium spikes. - Exercise caution on Yangtze basin cotton fiber quality; include acceptance clauses for length and maturity in procurement contracts. - Increase procurement from the Yellow River basin, where quality expectations are higher, to balance overall blending costs.

For Foreign Trade Companies - A lower-than-expected new-crop output will likely widen the domestic-international cotton price spread, reducing the cost competitiveness of exported cotton yarn and cotton goods. - Closely track late-July weather in Xinjiang and any yield revisions from the China Cotton Association to adjust export pricing in a timely manner. - Consider implementing long hedges in the futures market to lock in raw material costs and mitigate the risk of price volatility ahead of the new harvest.