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As daily high temperatures increase into the upper 70s-80s F range, mid-day relative humidity frequently drops below 50 percent. This article takes a look at the effect of temperature and humidity on pesticide drift.
By Rich Pope, Corn and Soybean Initiative
The month of June opened with a cool week, with about 80 percent of the normal heat accumulated between May 31 and June 7. Although a bit warmer weather would accelerate crop development, Iowa crops are progressing nicely in most areas.
There are several indicators of corn seedling damage from ammonia; an injury that is being reported this spring.
By Doug Cooper, Extension Communications
Weather with Iowa State University Extension climatologist Elwynn Taylor and crop issues as discussed by integrated pest management specialist Rich Pope and corn agronomist Roger Elmore are included in this week's report.
Taylor calls Iowa weather patterns a variation of the Goldilocks syndrome; some are too wet, some are too dry, while others are just right.
Pope reports black cutworms are in some corn fields, but not at significant levels. However, producers should continue to scout for damage.
There are several factors that producers need to consider in light of the EPA's ban on carbofuran, the active ingredient of FuradanT 4F.
Doug Cooper, Iowa State University Extension communications specialist, interviewed climatologist Elwynn Taylor, integrated pest management specialist Rich Pope, and corn agronomist Roger Elmore Tuesday, May 26 for the weekly Iowa crop and weather report.
Elmore reports heavy rain has created a bit of a dilemma for farmers trying to determine whether or not to replant corn. He says replanting at the end of May will normally reduce production by about 30 percent compared to late April early May plantings.
On July 29, experience training designed to improve management SCN; the next day, learn more about corn nematodes. Both workshops will be held in Ames.
Iowa State University Extension climatologist Elwynn Taylor, integrated pest management specialist Rich Pope, and soybean agronomist Palle Pedersen are interviewed during the weekly crop and weather report with Doug Cooper.
Taylor says La Niña will not be a factor during the 2009 growing season and there is a chance that an El Niño could develop. El Niño would take the threat of drought out of the picture, according to Taylor.
Specialists offer reminders of management practices that reduce drift.
Iowa State University Extension climatologist Elwynn Taylor, integrated pest management specialist Rich Pope, plant pathologist Daren Mueller and corn agronomist Roger Elmore join Doug Cooper for the weekly crop and weather report on May 11.
Taylor says weather patterns are starting to show a wet period moving into the Corn Belt and that could be very bad news for Illinois, Indiana and Ohio. La Niña continues to lose strength and should not be factor in the 2009 growing season.
