For wheat growers, it's a truism: Plant varieties that are resistant to prevalent diseases. But what if the wheat plant has to pay a price for resistance, possibly reducing its yield? Is the resistance worth it?

University of Nebraska-Lincoln greenhouse studies have confirmed a Palmer amaranth population resistant to postemergence application of atrazine and HPPD-inhibiting herbicides (Callisto, Laudis, Armezon/Impact). This is the second report (after Kansas) of a Palmer amaranth population resistant to atrazine and the HPPD group of herbicides.

MANA today announced its launch of five new soybean weed control tools: Rumble, Tailwind, Torment, Vise and Outflank herbicides.

Wayne Bailey, University of Missouri Extension specialist in plant sciences, urges Missouri corn producers to keep an eye out for indications of corn rootworm, caused by continuous planting of Bt hybrid corn on cropland.

Frogeye leaf spot, which is caused by the fungus Cercospora sojina, is an important pathogen of soybean plants.

Matt Hudson and Brian Diers, crop sciences researchers at the University of Illinois and Andrew Bent at the University of Wisconsin, think they may have found a way to strengthen plant resistance to soybean cyst nematodes.

Even as crops resistant to 2,4-D herbicide are being developed, populations of weeds are also developing a resistance, says the journal Weed Science.