Potassium (K) deficiency is first seen as a yellowing and necrosis of the corn leaf margins, beginning on the lower leaves. Symptoms usually don’t appear for some time after planting (about 4 to 6 weeks, around the V6 growth stage).
Herbicides can cause predictable symptoms to plants. Injury symptoms may be due to improper application, unintentional crop exposure (e.g., drift or carryover from past applications), or may develop if adverse environmental conditions (e.g., cold, dry, hot) occur after application.
Herbicide Injury in Corn | Wyffels Corn Hybrids
The most common types of herbicide injury in corn are (1) herbicide carryover in the soil from previous years (2) tank contamination (3) drift from neighboring fields (4) too high of herbicide rates or poor weather conditions after application that amplify symptoms.
Early Season Herbicide Injury to Corn - Penn State Extension
May 14, 2024 · Sometimes, early-season crop injury can occur from herbicides. This article overviews specific symptoms and conditions typically associated with herbicide injury in corn and soybeans.
The Symptoms of Early Season Herbicide Injury to Corn - Strip-Till …
May 16, 2024 · The potential for ALS injury increases with rapid uptake of the herbicides during warm, wet weather conditions. Much of this injury appeared as stunted, somewhat chlorotic corn, with our injury ratings ranging from 10 to 25%.
Corn grower’s guide for evaluating crop damage and replant options
This guide helps Minnesota corn growers evaluate hail damage and other crop injuries, determine regrowth potential and make informed decisions about whether to replant.
Herbicide Injury Symptoms on Corn and Soybeans (Purdue …
This section displays herbicide injury symptoms based on the mode of action of the herbicide, e.g. 2,4-D is in the Growth Regulator family.
Weed Identification and Herbicide Injury Guide for Corn and …
This University of Missouri publication is a resource for identifying weeds and understanding herbicide injury to crops. The first section of this guide provides photos and identification tips for 141 weed species found in Midwest agronomic production systems and includes seedling identification keys to aid in accurate and early identification ...
Herbicide Injury Diagnosis for Corn Seedlings at Emergence
May 7, 2015 · For pre-emergence applications in corn, the seedling shoot growth inhibitors, particularly the chloroacetamides, may injure seedlings when soils are cool and wet. Injury will not always be apparent aboveground.
Ultra-early planted corn may require up to four weeks to emerge, depending on soil and weather conditions. During this time, the seed and emerging seedling are highly vulnerable to damage from insects, diseases, and herbicide exposure. The emerging seedling may also encounter adverse field conditions such as crusting or ponding.
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