Monday, June 15, 2009

Cool weather slowing Iowa corn growth again this year
Much of Iowa has experienced below normal temperatures along with wet soils the past few weeks. These conditions not only slow the growth of corn, it also alters plant development, says Bob Hartzler, Iowa State University Extension weed management specialist.

Corn is likely to be more responsive to herbicides under these conditions. "We are seeing an increased response to postemergence herbicides," he notes. "This is likely due to changes in the cuticle that allow greater movement of chemicals from the leaf surface into the leaf."

In some situations, the response appears to be primarily due to the additives in the spray mix rather than actual herbicide, says Hartzler. Symptoms associated with additives (surfactants, AMS, etc.) include chlorotic mottling or necrosis of leaves, and are likely to be short-lived with no negative impact on crop development. Herbicides with a lower margin of crop safety are more likely to induce a negative response under these weather conditions.
Spain warns of summer jellyfish invasion on Mediterranean beaches - Telegraph
Over the last several years [although it hasn't warmed for a decade] there has been a huge rise in numbers due to the effects of global warming and over-fishing of their natural predators and each summer tens of thousands of holidaymakers are forced to seek treatment for minor stings.
Again, note that slight warmth must be good for jellyfish because we don't like them; slight warmth is necessarily devastating to any life form that you do like.

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