Amit Jhala - Extension Weed Management Specialist

Arrested ears with a ‘primordial tip’ due to pesticide application + NIS prior to tassel

Corn Ear Development Impacts from Post-emergence Pesticide Applications

June 4, 2020
Corn ear abnormalities have been noted the past few years. Tracing back the information on various field calls often pointed to a misunderstanding of proper growth stages when making post-emergence herbicide applications in addition to pre-tassel fungicide and insecticide applications.

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soybean seedling emerging

Q & A: What is Causing Problems with Soybean Emergence?

June 4, 2020
The past two weeks, we’ve received a number of calls regarding injured soybean plants during emergence. Additional questions include “What caused this?” and “Do I need to replant?” The following is what we’ve seen thus far.

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soybean seedlings

Soil Residual Herbicide Options after Soybean Emergence

June 3, 2020
Soybean planting was early this year in Nebraska, but dry soil conditions in most of May resulted in poor activation of pre-emergence herbicides applied in rain-fed fields and subsequently less than expected weed control.

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corn showing various growth stages

Accurately Growth Staging Corn after Lower Leaf Loss and Implication for Post-emergence Herbicide Application

May 29, 2020
After a frost, or hail event, the dead tissue is not able to resurrect itself and is eventually sloughed off as the plant continues to grow. Thus a common question is how do I determine corn growth stage when I can no longer count leaves?

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corn emerging from the ground

Soil Residual Herbicide Options after Corn Emergence

May 28, 2020
Application of soil residual herbicides is important because they deliver a few weeks of residual weed control and aid in weed resistance management by incorporating additional site(s) of action in herbicide program. Several residual herbicides can be applied after corn emergence without injury to corn.

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Palmer amaranth
Palmer amaranth in conventional soybean field is difficult to control (Photo by Amit Jhala).

Palmer Amaranth and Velvetleaf Control in Conventional Soybean Using Overlapping Residual Herbicide Programs

April 30, 2020
With the depressed corn and soybean prices in recent years in the United States, growers have shown interest in conventional soybean. Herbicide programs should be selected carefully that provide season-long weed control.

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soybeans germinating in a field

Timing is Critical for Applying PPO-Inhibiting Pre-emergence Residual Herbicides in Soybean

April 22, 2020
Soybean planting is about to start in Nebraska and it’s time to select pre-emergence herbicides to be applied in soybean. Protoporphyrinogen oxidase (PPO)-inhibiting herbicides are one of the key components of weed management in soybean.

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soybean field that used pre-emergent herbicide

Consider Label Restriction of Soybean Herbicides Based on Geographical Region in Nebraska

April 16, 2020
There are several herbicides that cannot be applied in certain areas of Nebraska based on number of factors such as high soil pH, dry soil conditions, potential for carryover injury, etc.

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