Bt Sweet Corn Still a Winner
Galen Dively, an Extension pest management specialist, said Bt sweet corn traits are still highly effective.
All varieties with the anti-insect genetics provide 100% control of whorl, stalk and ear infestations, and thereâs no evidence so far of any resistance developing to expressed Bt proteins, Dively said.
Bt traits suppress the whorl and tassel feeding damage of fall armyworm and controls western bean cutworm. This pest has been found in New York and eastern Canada as well as the lower Mid-Atlantic.
Corn earworms, meanwhile, are resistant to both Bt proteins and pyrethroids, Dively said. Spraying the ears, tassels and plant seems to offer the best protection, but the spraying must be carefully timed and applied in high volumes.
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Study Finds Some Water Quality Improvements In Choptank River
The Chesapeake Bay has a long history of nutrient pollution resulting in degraded water quality. However, scientists from the University of Maryland Center for Environmental Science’s Horn Point Laboratory are reporting some improvements in the Choptank River on Maryland’s Eastern Shore.
“The data presented here indicate that public and industrial investments in reductions of atmospheric emissions and upgrades to wastewater treatment plants have improved estuarine water quality in the Choptank,” said University of Maryland Center for Environmental Science Professor Emeritus Tom Fisher.
For the last 20 years, scientists have worked with farmers, wastewater treatment plant operators, government agencies, and water quality groups to encourage conservation efforts and to discern trends in water quality in the Choptank basin. In this study, scientists evaluated whether the total maximum daily load (TMDL) for the Ches