Agrow is part of the Business Intelligence Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC’s registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

This copy is for your personal, non-commercial use. Please do not redistribute without permission.

Printed By

UsernamePublicRestriction
UsernamePublicRestriction

US study finds waterhemp resistance indicators

A US study of glyphosate-resistant waterhemp (Amaranthus spp) in soybeans in Missouri has identified indicators for predicting future resistance incidences. Scientists at the University of Missouri (Columbia) found that cropping and herbicide use history, presence of other weed species and signs of herbicide survival served as the best indicators of glyphosate resistance. Tillage practices, field size, row spacing and weed infestation levels were not essential indicators. Glyphosate resistance was found in 69% of waterhemp samples from 144 soybean fields in 54 counties in Missouri in 2008 and 2009. Some 94% of the resistant populations had three field aspects in common: soybeans were the only crop planted in consecutive years; glyphosate was the only herbicide used for three or more years; and the field contained waterhemp that had survived herbicide application. The study was published in Weed Technology.

Advertisement

Topics

What to read next

Advertisement
UsernamePublicRestriction

Register

AG000811

Ask The Analyst

Please fill in the form below to send over your enquiry or check the Ask The Analyst Page to find out more about the service

Your question has been successfully sent to the email address below and we will get back as soon as possible. my@email.address.

All fields are required.

Please make sure all fields are completed.

Please make sure you have filled out all fields

Please make sure you have filled out all fields

Please enter a valid e-mail address

Please enter a valid Phone Number

Ask your question to our analysts

Cancel