Category Archives: Field Crop IPM

New Way to Detect Palmer Amaranth in Contaminated Seedlots

Last summer, farmers in the Midwest got an unwelcome surprise after planting native seed on Conservation Reserve Program acres – Palmer amaranth. Palmer amaranth is an aggressive and hard-to-kill weed. As a possible solution, some states declared Palmer a noxious … Continue reading

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New National Pest Alert for Palmer Amaranth released

A new National Pest Alert for Palmer Amaranth has been released. This pest alert has been approved by the national leadership of USDA NRCS to address the recent problems with Palmer Amaranth seed inclusion in wildflower and pollinator seed mixes. Ultimately, … Continue reading

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Report: Milkweed losses may not fully explain monarch butterfly declines

By  Diana Yates University of Illinois Steep declines in the number of monarch butterflies reaching their wintering grounds in Mexico are not fully explained by fewer milkweeds in the northern part of their range, researchers report in a new study. … Continue reading

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Status of Herbicide-Resistant Weeds in Nebraska

Amit Jhala – Extension Weed Management Specialist There are 480 unique cases of herbicide-resistant weed biotypes globally in 252 weed species (147 dicots and 105 monocots). Weeds have evolved resistance to 23 of 26 known herbicide sites of action and … Continue reading

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What do farmers think about resistant weeds?

From IPM in the South by Rosemary Hallberg in Southeast Farm Press Both scientists and regulators have had a lot to say about the growing problem of herbicide resistance and how weed management techniques need to change in response. However, … Continue reading

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Field-scale experiments reveal persistent yield gaps in low-input and organic cropping systems

Alexandra N. Kravchenko Sieglinde S. Snapp G. Philip Robertson http://www.pnas.org/content/114/5/926.abstract Significance Meeting future food needs requires a substantial increase in the yields obtained from existing cropland. Prior global analyses have suggested that these gains could come from closing yield gaps—differences … Continue reading

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Update on Bacterial Leaf Streak of Corn in Nebraska

Feb. 23, 2017 http://cropwatch.unl.edu/2017/update-bacterial-leaf-streak-corn-nebraska Terra Hartman – Graduate Research Assistant Tamra Jackson-Ziems, Extension Plant Pathologist Bacterial leaf streak disease of corn is caused by the bacterium Xanthomonas vasicola (syn. X. campestris pv. zeae). It was previously only reported on corn … Continue reading

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Spider mite control in corn aided by moisture

From IPM inthe South by Rosemary Hallberg by Kay Ledbetter, Texas A&M AgriLife The Texas A&M AgriLife Extension Service has a list of do’s and don’ts when it comes to spider mite treatment on corn, according to Dr. Ed Bynum, … Continue reading

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Minnesota researchers spill the beans on pulses

When the United Nations announced that 2016 would be the “International Year of Pulses,” Craig Sheaffer wasn’t surprised. An agronomist with a bent toward organics, Sheaffer researches perennial native and introduced legumes, grasses, and woody species at the University of … Continue reading

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Effectiveness of ammonium sulfate vs. new granular sulfur fertilizers in crop production

Feb. 23, 2017 | 1 p.m. CST Sulfur (S) is known to be key to crop growth and high yields, yet S deficiency has become a fertility issue worldwide due to a decrease in S depositions from cleaner, less polluted air … Continue reading

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