Center for Integrated Plant Systems (CIPS)
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Wednesday, July 30, 2014
 
 
   
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Tall Waterhemp Management Detach

Waterhemp SeedlingTall waterhemp and a very similar species, common waterhemp, are members of the pigweed (Amaranth) family. These two species have identical vegetative characteristics and can be differentiated only during seed formation and plant maturation. There appears to be no difference in herbicide efficacy between the waterhemp species, so they will be discussed collectively as waterhemp.

Waterhemp has become a predominant pigweed species throughout much of the Midwest over the past decade. Several factors probably contributed to the increase of waterhemp in the Midwest. Like other pigweeds, waterhemp is an annual plant that produces prolific amounts of very small seeds. The adoption of no-tillage and reduced-tillage production systems allows this seed to remain close to the soil surface for germination. Waterhemp can germinate much later in the growing season than other annual weeds, including other pigweed species. Peak emergence of waterhemp occurs during early July in Iowa; however, waterhemp emergence can span several months. Waterhemp’s extended period of emergence proves to be a very important attribute of this weed because it allows it to avoid herbicide applications and tillage. Moreover, certain biotypes of waterhemp have been found to be resistant to ALS-inhibiting herbicides as well as triazine herbicides. A population of waterhemp in Kansas has displayed resistance to Ultra Blazer but not to the other diphenylethers. The decrease in soil-applied residual herbicides, the increase of total postemergence herbicide programs, and the presence of herbicide-resistant waterhemp have undoubtedly increased the population of waterhemp in the Midwest.

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Plum Curculio Detach

Plum CurculioDuring the 2000 the growing season, a number of loads of harvested cherries in Michigan were rejected because they were contaminated with 4th instar plum curculio larvae. Between 1 and 1.5 million pounds of contaminated cherries were rejected.

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Western Corn Rootworm Detach

Corn Rootworm AdultWestern corn rootworm has been a problem in the midwest for a number of years. This site offers information to growers, researchers and industry on rootworm control strategies.

Corn Rootworm Website

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