How many degree days (DD60's) are generally needed from cutout to insecticide termination?

In cotton production, degree days (DD60's) are used as a heat accumulation measure that helps in tracking the growth and development stages of the crop. The period from cutout to insecticide termination is critical, as it represents the time when the cotton plant is transitioning into a mature stage and reaching peak boll development.

The correct answer indicates that generally 300-350 DD60's are needed during this phase. This range reflects the average temperature conditions and growth rates that allow for optimal development, maturity, and preparation for harvest. Sufficient degree days are essential to ensure that the plant reaches its productive potential while managing pest pressures effectively.

Reaching this degree day range implies that the local climatic conditions have been conducive to proper cotton growth, which is critical for planning pest control measures, including the timely application of insecticides to protect the bolls from damage.

The other ranges do not typically reflect the average needs for this specific phase in cotton growth when considering the environmental factors and growth rate required to achieve a successful outcome.