Timing critical for Palmer pigweed control

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

Florida Panhandle farmers are busy. Many are still planting peanuts and cotton, some are harvesting wheat and oats, cutting hay, putting out fertilizer and spraying for weeds and thrips.

Herbicide applications are going out in areas that are dry enough to get equipment in. Some fields are being overlooked and others not being sprayed on time. Timing of herbicide application for Palmer Amaranth (pigweed) control is critical now, as crops emerge and pre-emergence applications wear off.

Palmer amaranth can grow in excess of 1 inch per day and be next to impossible to control once it is 6 inches tall or more. If you see 4 inch Palmers on Friday, and you wait until Monday to spray, you will probably not get good control of those weeds. The goal should be to target weeds when they are 4 inches or less and combine foliar and soil residual herbicides to prevent new weeds from emerging.

With this in mind, it’s important to scout fields early for emerging Palmer. Getting herbicides out on time is easier said than done, given that there are so many other things that growers have on their plates right now.

This palmer amaranth in the photo above was sprayed with glyphosate over a week ago. Notice how it was damaged but survived, and the cutleaf evening primrose to the right did not. When escapes occur, weeds will need to be hand-pulled prior to seed production. If using Liberty Link cotton, be sure not to make more than 2 applications (1 would be better) of Liberty per season unless you want to develop Liberty resistance as well!

The field in the picture above is a prime candidate for a paraquat (Gramoxone) + Dual Magnum application. Paraquat will burn peanut foliage, but is the best option for palmer amaranth that is 4 inches or less in height. Paraquat can be applied at true cracking and up until 28 days after cracking. Since adding Dual Magnum increases foliage burn, some growers choose to add 4 – 8 oz./ acre of Basagran to lessen the burn.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Ranco Bucket Elevators

Ranco Bucket Elevators are built to last, with thousands of bucket elevators in operation around the world. Quality 304 stainless ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form