Disease - Publications And Resources

Disease Publications and Other Resources

Publications

Oct 2020

Symptom Identification and Management of Cotton Seedling Diseases

Publication (PDF, 1.2MB)

Authors: Jiahuai Hu, Randy Norton

Seedling diseases, also known as damping-off (seedling death), are caused by several common soil-inhabiting fungi acting alone or collectively during pre-emergence and postemergence of cotton seedlings. Seedling diseases are common but often a minor problem in cotton production areas of Arizona in most years. However, significant stand loss to seedling diseases can occur sporadically in some fields without good crop rotation history.
Sep 2020

Fusarium Wilt of Cotton

Publication (PDF, 1.8M)

Authors: Jiahuai Hu, Randy Norton

Fusarium wilt is a destructive vascular wilt and root rot of many plant species, including all species of domesticated cotton.
Jul 2019

2019 Guidelines for Whitefly / CYSDV Management on Fall Melons

Publication (PDF, 764KB)

Authors: John C. Palumbo

CYSDV has caused significant reductions in fruit yields in the past, mainly due to the whitefly. This article gives some management guidelines for the whitefly including cultural management and chemical management.
May 2019

Huanglongbing of Citrus

Publication (PDF, 1.24MB)

Authors: Jiahuai Hu and Glenn Wright

Huanglongbing (Chinese for yellow dragon disease or yellow shoot disease, abbreviated as HLB) also known as citrus greening, is a lethal, fast-spreading bacterial disease of citrus. HLB is the worst disease of citrus trees worldwide.
Mar 2019

Minimizing Risks: Use of Surface Water in Pre-Harvest Agricultural Irrigation

Publication (PDF, 847KB)

Authors: Jessica L. Dery, Natalie Brassill, and Channah M. Rock

Irrigation water can act as a vector, or carrier, that can transport or spread pathogens to crops, where they have the potential to cause illness (CDC, 2018). Decisions to treat irrigation water can be driven by buyer requirements, for product marketing or branding, or because the water quality exceeds the FDA Food Safety Modernization Act (FSMA) regulations or the Leafy Green Marketing Agreement (LGMA) standards for generic Escherichia coli (E. coli).
Jul 2018

2017 Guidelines for Whitefly / CYSDV Management on Fall Melons

Publication (PDF, 656KB)

Authors: John C. Palumbo

CYSDV has caused significant reductions in fruit yields in the past, mainly due to the whitefly. This article gives some management guidelines for the whitefly including cultural management and chemical management.
Jun 2018

Vegetable Diseases Caused by Phytophthora capsici in Arizona

Publication (PDF, 2.27MB)

Authors: Jiahuai Hu

Phytophthora capsici is responsible for some of the most important diseases of peppers and cucurbits worldwide. The diseases are commonly referred to as Phytophthora blight, Phytophthora crown and root rot, Phytophthora fruit rot, and damping of.
Jun 2018

Phymatotrichopsis Root Rot in Pecan

Publication (PDF, 2.22MB)

Authors: Jiahuai Hu

Phymatotrichopsis root rot (abbreviated as PRR) is commonly referred to as Cotton root rot, Phymatotrichum root rot, Texas root rot, or Ozonium root rot. This pathogen is prevalent in all of major pecan production areas in Arizona.
May 2018

Cotton Stem Blight and Boll Rot

Publication (PDF, 779KB)

Authors: Jiahuai Hu

Cotton stem blight and boll rot is caused by the necrotrophic fungus Sclerotinia sclerotiorum. This pathogen can attack hundreds of plant species including many important agricultural crops such as vegetables, legumes, sunflowers, canola, many flowering bedding plants, and stone fruits.
Feb 2018

Stripe Rust of Small Grains

Publication (PDF, 689KB)

Authors: Jiahuai Hu and Mike Ottman

Stripe rust was reported for the first time on barley in Arizona in 1993. The disease is caused by the basidiomycete fungus Puccinia striiformis. Stripe rust appears as yellow orange stripes between the veins of the leaf blades. The disease increases water use, shrivels the grain, and decreases yield.
Jan 2017

Potential Yield Increase by Grafting for Watermelon Production in Arizona

Publication (PDF, 1.67MB)

Authors: Mark Kroggel and Chieri Kubota

Grafting cucurbits onto rootstocks resistant to diseases and abiotic stresses can be a method to overcome limited availability of effective pre-plant fumigants or land to rotate and to allow earlier planting.
Dec 2016

Pest Abundance on Desert Produce and Melon Crops in 2016

Publication (PDF, 237KB)

This document contains a number of charts and graphs detailing information relating to the abundance of Whitefly, Bagrada bugs, Thrips, Beet Armyworm, Cabbage Looper, and Corn Earworm. There are also a few figures relaying temperature information.
Jul 2016

2016 Guidelines for Whitefly / CYSDV Management on Fall Melons

Publication (PDF, 547KB)

Authors: John C. Palumbo

CYSDV has caused significant reductions in fruit yields in the past, mainly due to the whitefly. This article gives some management guidelines for the whitefly including cultural management and chemical management.
Jun 2016

2017 Great Arizona Mosquito Hunt – June 2017

Publication (PDF, 647KB)

Featuring 2017 Great Arizona Mosquito Hunt. Details on how to participate in the event are described. Including on how to make a mosquito trap from some simple objects.
Dec 2015

Pest Abundance on Desert Produce and Melon Crops in 2015

Publication (PDF, 193KB)

This document contains a number of charts and graphs detailing information relating to the abundance of Whitefly, Bagrada bugs, Beet Armyworm, Cabbage Looper, and Corn Earworm. There are also a few figures relaying temperature information.
Sep 2015

Biology and Management of Downy Mildew of Lettuce

Publication (PDF, 695KB)

Authors: Michael E. Matheron

This document describes the characteristics of downy mildew found on lettuce. Giving an in depth explanation of how it survives. Later it gives suggestions on how to manage downy mildew of lettuce.
Aug 2015

Biology and Management of Fusarium Wilt of Lettuce

Publication (PDF, 486KB)

Authors: Michael E. Matheron

Fusarium wilt of lettuce is caused by the soil-borne fungus Fusarium oxysporum f. sp. lactucae. This article decribes the nature of the disease and it's development. It also gives suggestions for how to manage it.
Jul 2015

2015 Guidelines For Whitefly / CYSDV Management on Melons

Publication (PDF, 1.38MB)

Authors: John C. Palumbo

CYSDV has caused significant reductions in fruit yields in the past, mainly due to the whitefly. This article gives some management guidelines for the whitefly including cultural management and chemical management.
Jul 2015

Bats

Publication (PDF, 788KB)

Authors: Dawn Gouge, Shujuan Li, and Shaku Nair

This document discusses bats and some of their characteristics. Methods of scouting for them are outlined. Bats can be quite hazardous to human health, if you ever find one on the ground, don't touch it.
May 2015

Cultural Practices for Karnal Bunt Control

Publication (PDF, 1.35MB)

Authors: Michael J. Ottman

Karnal bunt is a disease of wheat, durum, and triticale caused by the fungal pathogen Tilletia indica Mitra. Karnal bunt was first reported in India in 1931. This article discusses it's cycle, symptoms, and suggestions on how to control it.

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Presentations

Apr 2019

Alternative Methods of Weed Control

Presentation (PDF, 10.7MB)

Authors: Kai Umeda
Jun 2008

Vegetable Weed Control in the Desert

Presentation (PDF, 5.58MB)

Authors: Barry Tickes

Location Presented: Yuma Agricultural Center
Dec 2003

Management Strategies for Lettuce Drop in Arizona and California

Presentation (PDF, 440KB)

Authors: Barry Pryor
Dec 2003

Onion Disease Management

Presentation (PDF, 441KB)

Authors: Turini, T.

Location Presented: 14th Annual Desert Crops Workshop, Holtville, California.
Sep 2003

Review of Current and Potential Management Tools for Powdery Mildew on Melon Crops

Presentation (PDF, 282KB)

Authors: Matheron, M.

Location Presented: Horticulture Integrated Pest Management Seminar, Pinal County Cooperative Extension Office, Casa Grande, AZ.
Dec 2002

Soilborne Diseases of Melon and Watermelon

Presentation (PDF, 82KB)

Authors: Olsen, M.

Location Presented: Annual Desert Crop Workshop, Yuma, AZ.

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