Weeds - Publications And Resources

Weed Publications and Other Resources

Weed Publications

May 2024

Weed Interference with Insect Management in Desert Crops (2024)

Publication (PDF, 757KB)

Authors: John C. Palumbo

Effective weed management is critical for the profitable production of vegetable crops in the desert southwest for all the obvious reasons. However, weed management is also essential for another important, but often overlooked, reason. Several common weed species found in and around vegetable crops can serve as host plants to many insect pests that can later infest nearby crops. Additionally, when weeds are not controlled in the field, they can be an impediment to effective insect control.
May 2020

Weed Interference with Insect Management in Desert Crops 2020

Publication (PDF, 886Kb)

Authors: John C. Palumbo

Effective weed management is critical for the profitable production of vegetable crops in the desert southwest for all the obvious reasons. However, weed management is also essential for another important, but often overlooked reason.
May 2019

Weed Interference with Insect Management in Desert Crops

Publication (PDF, 844KB)

Authors: John C. Palumbo

Effective weed management is critical for the profitable production of vegetable crops in the desert southwest for all the obvious reasons. However, weed management is also essential for another important, but often overlooked, reason.
Jul 2018

Interactions Between Insects & Weeds in Desert Crops - July 2018

Publication (PDF, 356KB)

Authors: John C. Palumbo

There is a positive correlation between weeds and insects. This article describes the relationship between weed management and insects. It details how weeds can be a refuge for beneficial insects and how they can also act as a reservoir for insect pests. The impact that weeds have on insecticide application is also discussed.
May 2018

Interactions Between Insects & Weeds in Desert Crops - May 2018

Publication (PDF, 354KB)

Authors: John C. Palumbo

There is a positive correlation between weeds and insects. This article describes the relationship between weed management and insects. It details how weeds can be a refuge for beneficial insects and how they can also act as a reservoir for insect pests. The impact that weeds have on insecticide application is also discussed.
Jul 2017

Interactions Between Insects & Weeds in Desert Crops - 2017

Publication (PDF, 354KB)

Authors: John C. Palumbo

There is a positive correlation between weeds and insects. This article describes the relationship between weed management and insects. It details how weeds can be a refuge for beneficial insects and how they can also act as a reservoir for insect pests. The impact that weeds have on insecticide application is also discussed.
Feb 2017

Selective Preemergence and Postemergence Control of Panic Liverseedgrass (Urochloa panicoides) in Desert Turf

Publication (PDF, 16.6MB)

Authors: Kai Umeda

Panic liverseedgrass is a relatively new problem weed occurring in turfgrass in the low desert region of Arizona. It is invasive and federally listed as a noxious weed. Herbicide use and efficacy information is limited to row crops or noncrop areas.
May 2016

Interactions Between Insects & Weeds in Desert Crops - 2016

Publication (PDF, 354KB)

Authors: John C. Palumbo

There is a positive correlation between weeds and insects. This article describes the relationship between weed management and insects. It details how weeds can be a refuge for beneficial insects and how they can also act as a reservoir for insect pests. The impact that weeds have on insecticide application is also discussed.
Apr 2016

Zika Virus – April 2016

Publication (PDF, 889KB)

Featuring Zika and IPM Weed Control. Zika virus is often transmitted by mosquitoes. Although it appears as if it hasn't established itself in the United States as of yet, travel cases occur. Symptoms are listed and some suggestions are given. Suggestions on how to treat for weeds in a proactively rather than a reactively.
Mar 2016

A Winter Weed - - Still Here But Best Forgotten: Mediterraneangrass

Publication (PDF, 2.4MB)

Authors: David M. Kopec

Mediterraneangrass is a bunchgrass that produces vegatative shoots by tillering. It is relatively simple to remove mechanically due to it's shallow root system. It is not tolerant of hot temperatures and will die if exposed to temperatures over 85F for several days.
Oct 2015

Wait wait…it’s really too late! Late season control of summer annual grassy weeds in turf

Publication (PDF, 584KB)

Authors: David M. Kopec

If weeds establish themselves early in the spring, it may still appear as though nothing is wrong during the summer months. When fall comes around it may only then be then that the problem becomes noticeable.
Sep 2015

Bagrada Bug Management Tips - 2015

Publication (PDF, 364KB)

Authors: John C. Palumbo

Contains information on how to manage the Bagrada bug. Includes: where they tend to hide, how to scout them out, what their feeding signs look like, and tips regarding chemical control.
Feb 2015

Basic Pre-emergence weed control in lawns

Publication (PDF, 297KB)

This article covers some of the basic concepts of pre-emergence herbicides. The most common active ingredients are listed. Suggestions on application and use are given.
Jun 2014

Determination of optimal planting configuration of low input and organic barley and wheat production in Arizona

Publication (PDF, 680KB)

Authors: P. Andrade-Sanchez and M. J. Ottman

Markets for organic barley and wheat are expanding. A major problem growing organic barley and wheat is controlling the weeds. This paper outlines a study of growing organic barley documenting the weed pressures.
Jan 2014

Effects of Herbicides on Bermudagrass Growth

Publication (PDF, 5.3MB)

Authors: Cassandra Santos and Kai Umeda

The type of herbicidal injuries inflicted upon bermudagrass by various herbicides is discussed. Some herbicides affected growth as much as four weeks after the initial application.
Aug 2013

Bagrada Bug Management Tips - 2013

Publication (PDF, 364KB)

Authors: John C. Palumbo

Contains information on how to manage the Bagrada bug. Includes: where they tend to hide, how to scout them out, what their feeding signs look like, and tips regarding chemical control.
Jun 2013

Insect * Weed Interactions in Vegetable Crops

Publication (PDF, 77KB)

Authors: John C. Palumbo

There is a positive correlation between weeds and insects. This article describes the relationship between weed management and insects. It details how weeds can be a refuge for beneficial insects and how they can also act as a reservoir for insect pests. The impact that weeds have on insecticide application is also discussed.
Jun 2013

Strategies for Nutsedge Control in Turf

Publication (PDF, 105KB)

Authors: Kai Umeda

Sometimes known as the "world's worst week", nutsedge can be difficult to deal with. This article discusses the use of MSMA (monosodium methylarsonate) to control nutsedge and some of the regulations in place for that chemical.
Apr 2012

Interactions between Insects and Weeds in Vegetable Crops

Publication (PDF, 77KB)

Authors: John C. Palumbo

There is a positive correlation between weeds and insects. This article describes the relationship between weed management and insects. It details how weeds can be a refuge for beneficial insects and how they can also act as a reservoir for insect pests. The impact that weeds have on insecticide application is also discussed.
Apr 2008

Alfalfa Weed Control in the Low Deserts of Arizona

Publication (PDF, 443KB)

Authors: Barry Ticks and Mike Ottman

Alfalfa is a vigorous crop that is very competitive with weeds. However, chemical weed control is often necessary even in well managed alfalfa since the marketplace has a low tolerance for weeds in alfalfa hay.

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Weed Presentations

Oct 2019

Alfalfa Production: Getting a Good Start

Presentation (PDF, 4.8MB)

Authors: Mike Ottman

Location Presented: Parker and Blythe
Jun 2019

Selection of appropriate preemergence and postemergence herbicides for strategic weed control in turf

Presentation (PDF, 8.8MB)

Authors: Kai Umeda

Location Presented: Guam
Jun 2019

Herbicide Application Techniques and Sprayer Calibrations Part 2

Presentation (PDF, 5.35MB)

Authors: Kai Umeda

Location Presented: Guam
Apr 2019

Alternative Methods of Weed Control

Presentation (PDF, 10.7MB)

Authors: Kai Umeda
Feb 2018

Protection of the Pesticide Applicator

Presentation (PDF, 311 KB)

Authors: Wierda, M.

Location Presented: Presented at Willcox Community Center, AZ.
Dec 2017

Chemical characteristics routes of entry modes of entry and you

Presentation (PDF, 480KB)

Authors: Wierda, M.

Location Presented: Presented at Festival Hall Room 7, Cedar City, UT
Nov 2017

Pesticide Handling and Personal Protective Equipment

Presentation (PDF, 63KB)

Authors: Wierda, M.

Location Presented: Presented at Palm Ridge Recreation Center, AZ.
Oct 2017

Pesticide Safety: Transportation Chemical Characteristics and the Environment and Hazards and First Aid

Presentation (PDF, 530KB)

Authors: Wierda, M.

Location Presented: Presented at Mesa Community College, Mesa, AZ.
Oct 2009

Broad Spectrum Weed Conrol

Presentation (PDF 40.6MB)

Authors: Kai Umeda
Jan 2008

Weed Identification and Control

Presentation (PDF, 2.4MB)

Authors: Kelly Young

Location Presented: Maricopa County
Oct 2007

Weed Identification and Proper Herbicide Selection

Presentation (PDF, 5.64MB)

Authors: Kai Umeda
Aug 2004

Using Chemicals for Weed Control and Bermudagrass Suppression During Fall Overseeding

Presentation (PDF, 309KB)

Authors: Kai Umeda
Jan 2004

Monitoring, Preventing, and Controlling Weeds in Residential and Commercial Landscapes

Presentation (PDF, 2.63MB)

Authors: Kai Umeda

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