Milder Arizona Summer Cuts Insecticide Use, Lifts Cotton Quality

Only about 20% of Cassy England's Arizona cotton fields needed an insecticide spray this season — a sharp drop from typical years when whitefly and lygus control ranks among the state's biggest input costs. The reason, she said, was weather. A milder summer with lower heat stress and unusually light bug pressure left the crop in strong condition across Pinal County, which grows more than half of all Arizona cotton.

"This year has been a more mild summer," England, a cotton farmer and president of the Arizona Cotton Growers Association, said. "We've had less heat stress over the summer, which now during the fall, we've started to get rain. So that's delayed us slightly. But overall, with the lower heat stress and low bug pressure, the cotton's doing well."

What does the weather change for quality?

Plenty. USDA's National Agricultural Statistics Service has long noted that Arizona cotton — particularly Pima varieties — is highly sensitive to extreme heat during boll development. Cooler summers protect that stage, and this year's conditions gave growers a measurable quality edge rather than just a comfort gain. England runs her operation with her uncle, Don, and cousin, Donny, on ground stretching from Casa Grande to Marana.

The heat relief cuts two ways for margins. Lower stress supports yield potential. Fewer sprays shrink crop-protection bills that typically weigh on Arizona producers managing whitefly and lygus pressure season after season.

Water still caps planted acres

Weather eased. Water didn't. England explained that allocations vary by district, but in one of the larger irrigation districts serving her area, restrictions limited growers to planting roughly 50% of their land. That constraint reflects the broader squeeze on Pinal County from Central Arizona Project allocations and groundwater pumping regulations, forces that have reshaped planting decisions across the region in recent years.

So the input-cost win on insecticides lands inside a season where the district already capped the acreage base. Growers saved on sprays but planted half the ground in the key district.

Fall rain delays the harvest

The same rains that eased summer stress now push the calendar back. Defoliation — the chemical step required before mechanical harvesting — has stalled under wet conditions, which complicate timing and raise costs.

"It has delayed our defoliation process," England said. "This time of year normally, we would be harvesting cotton and getting things defoliated and preparing for harvest, and we are behind."

What's next for Arizona cotton?

England, for one, is watching demand more than weather. She said she hopes for higher cotton prices and a revival of domestic textile manufacturing.

"I hope to see an increase in domestic textiles and spinning and everything to bring cotton back to America," she said. "That is my goal."

Her optimism comes with caveats she names plainly: water constraints, shifting weather patterns and global market pressures. Arizona growers are balancing both, and this season's mild summer — quality gains, fewer sprays, delayed defoliation, half-district planting caps — shows exactly what that balance looks like on the ground.