Only 20% of Arizona Cotton Fields Needed Insecticide This Season

Only about 20% of Cassy England's cotton fields required an insecticide spray this season — a fraction of what a normal year demands in Pinal County, Arizona, where whitefly and lygus bug control routinely ranks among the biggest input costs.

England, who farms with her uncle Don and cousin Donny on an operation stretching from Casa Grande to Marana, and who serves as president of the Arizona Cotton Growers Association, puts the season down to weather. "This year has been a more mild summer," she 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."

Why milder heat matters for quality

Pinal County grows more than half of Arizona's cotton, so conditions there effectively set the tone for the state's crop. The stakes around temperature are not abstract. USDA's National Agricultural Statistics Service has historically flagged Arizona cotton — particularly Pima varieties (the extra-long staple type prized for premium textiles) — as highly sensitive to extreme heat during boll development. Excessive summer heat stresses plants and drags down yields.

This year broke that pattern. Less intense summer heat meant less plant stress during the boll-fill window, and growers are seeing the payoff in overall crop quality. England described the growing season in Pinal County as noticeably different from recent years, with the cotton performing well under the gentler conditions.

The pest picture amplified the gain. With low insect pressure across the region, growers largely skipped insecticide applications altogether. For an Arizona cotton producer, that is a direct cut to a major cost line, not a marginal saving.

What about the water restrictions?

Weather was the good news. Water is the constraint that keeps shaping planting decisions. England explained that allocation varies by district, but in one of the larger irrigation districts serving her area, growers could plant only about 50% of their land because of restrictions.

That figure reflects the broader squeeze on Pinal County agriculture. Allocations from the Central Arizona Project (the canal system delivering Colorado River water to central and southern Arizona) and groundwater pumping regulations have reshaped how much land growers can realistically put into cotton in recent years. A quality-boosting summer does not unlock acreage that water rules have already taken off the table.

How far behind is harvest?

The same fall rains that eased the season's end have pushed the harvest calendar back. Defoliation — the chemical removal of leaves required before mechanical picking — has stalled under wet conditions.

"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." Wet weather complicates spray timing and can push up costs, so the delay is not merely a scheduling nuisance.

What should growers watch next?

England is looking past this season toward higher cotton prices and, more ambitiously, a domestic manufacturing revival. "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."

For Arizona growers, the near-term watchpoints are concrete: how far the defoliation and harvest window slips as fall rains continue, what the final quality grades show for a low-stress Pima crop, and whether the roughly 50% planting caps in restricted irrigation districts persist into next season's planning.