Temperature inversion and herbicide applications

The following tips were presented in a Delta Farm Press article related to the dicamba drift debate. Because some herbicide labels include instructions about not applying during a temperature inversion, I am including the tips below. You can read the entire article in Delta Farm Press.

Here are eight things about temperature inversion based on University of Missouri research you should know now. Continue reading

Postdoctoral Scholar in aquatic plant weed control and restoration at UC Davis

The Gornish lab at the University of Arizona and the Grosholz lab at the University of California, Davis, seek a postdoctoral scholar to manage a weed control and restoration project fully funded by the California Delta Conservancy and the California Department of Water Resources, entitled ‘Investigations of restoration techniques that limit invasion of tidal wetlands.’ Continue reading

More precautions needed when spraying with dicamba and 2,4-D

From the Weed Science Society of America

New resistant soybean and cotton cropping systems based on the synthetic auxin herbicides give farmers new options for managing Palmer amaranth and other broadleaf weeds resistant to glyphosate. But scientists with the Weed Science Society of America (WSSA) say special precautions are necessary. Auxin herbicides are known to drift and to cause harm to sensitive, off-target broadleaf plants.

“Concerns about drift led the U.S. EPA to issue time-limited registrations for the auxin herbicides dicamba and 2,4-D of two years and five years respectively,” says Kevin Bradley, Ph.D., past president of WSSA and associate professor at the University of Missouri. “The approved product labels have considerable detail on management of drift and other risks and must be carefully followed to reduce off site movement. Unless growers show they can use these herbicides as labeled, the registrations could easily be revoked.” Continue reading

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, decisions must be made at the local level to address the issue of Palmer amaranth in pollinator habitats, field edges and conservation plantings.

http://ncipmc.org/action/alerts/palmer.php

Florida research helps vegetable farmers manage weeds

in Southeast Farm Press

by Brad Buck

By using a combination of fumigants, University of Florida scientists believe they can surgically strike out some weeds that otherwise get in the way of vegetable growth.

Researchers with the UF Institute of Food and Agricultural Sciences have shown that farmers can place fumigants in specific zones, rather than using a single treatment for every situation. For example, fumigants applied to a specific area where weed seeds germinate can reduce the number of weeds that grow. Researchers say this will help growers as they try to manage pests in areas where they cause the most trouble. Continue reading

Floating rig battles invasive lake vegetation

In StarNews Online

by Terry Reilly

The lakes at Boiling Spring Lakes are not bubbling with scalding water. Instead of steam rising, the tentacles of invasive vegetation protrude from the city’s three main lakes.

The city launched a partial attack last year but retreated due to a lack of funds. Continue reading

Weeds could develop resistance to dicamba in three generations

In Delta Farm Press

What happens if farmers follow the same practices they have when other new herbicide chemistries have come on the market over the last several decades?

If they’re not careful, they will simply replace one herbicide with another, as they did with Prowl and Treflan, ALS herbicides, glyphosate and most recently with PPO inhibitors such as Flextar and Reflex. Continue reading