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  1. Agricultural IPM
  2. Field Crops
  3. Outputs
Field Crop Outputs
Section Shortcuts
Field Crop Presentations
Field Crop Publications
Field Crop IPM Shorts
Field Crop Presentations
  • Oct 2019
    Alfalfa Production: Getting a Good Start
    Presentation (PDF, 4.8MB)
    Authors: Mike Ottman
    Location Presented: Parker and Blythe
  • Aug 2014
    Whitefly Management & Prevention of Excess Sugars in Cotton
    Presentation (Video Link)
    Authors: Ellsworth, P.
    Location Presented: "Focus on Cotton" webinar series of the Plant Management Network. Note: This webinar focuses on management practices appropriate to Arizona.
  • Oct 2013
    GMO's, NTO's, Bt and IPM: Making Sense of Genetically modified crops
    Presentation (PDF, 2.98MB)
    Authors: Peter Ellsworth
    Location Presented: Arizona Highlands Garden Conference 2013, Miami AZ
  • Sep 2013
    Nutrient Management and Plant Density Recommendations For LA PAZ county Alfalfa Growers
    Presentation (PDF, 2.38MB)
    Authors: Shawna Loper
    Location Presented: Parker, AZ
  • Feb 2013
    Pre-season and Early Season Cotton Management
    Presentation (PDF, 1.56MB)
    Authors: Guangyao (Sam) Wang
    Location Presented: Avondale, AZ
  • Mar 2009
    IPM in Arizona Cotton: Successful adoption of selective controls for multiple key insect pests
    Presentation (PDF, 1.34MB)
    Authors: Peter Ellsworth and Steve Naranjo
    Location Presented: Presented at 6th International IPM Symposium, Portland, OR.

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Field Crop Publications
  • Sep 2019
    Nondormant Alfalfa Varieties for Arizona 2019
    Publication (PDF, 435KB)
    Authors: Mike Ottman
    Alfalfa varieties differ in fall dormancy, defined asgrowth during the fall. Nondormant alfalfa varieties are usually planted in mild winter areas for their ability to grow in the fall. Nondormant, very nondormant, and extremely nondormant alfalfa varieties (fall dormancy class 8, 9, and 10) are adapted to elevations below 4000 feet in Arizona.
  • Dec 2018
    Promoting the Use of Predators
    Publication (PDF, 5.7MB)
    Authors: Peter C. Ellsworth, Naomi Pier, Alfred J. Fournier, Steven E. Naranjo, Timothy Vandervoet
    New research has identified critical levels of predators that impact economic spray decisions for whiteflies. By working with the beneficials found naturally within a field, reliance on chemical controls could effectively be reduced.
  • 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.
  • Feb 2017
    Cotton Variety Testing Results - 2016
    Publication (PDF, 4.36MB)
    Authors: Randy Norton, Ayman Mostafa
    Variety selection is one of the most important decisions a grower will make contributing to the success of a cotton crop. It is critical, that a grower have as much information as possible in order to make an informed decision regarding variety selection.
  • Nov 2015
    Cowpea Aphid in Alfalfa
    Publication (PDF, 248KB)
    Authors: John Palumbo and Barry Tickes
    Recent outbreaks of cowpea aphid in alfalfa are more than a local phenomena. Large populations of cowpea aphids have been reported throughout Arizona. The reason behind these outbreaks are unknown. This article hopes to bring some insight by discussing the cowpea aphid, the damage it causes, and suggestions on controlling it.
  • Oct 2015
    Wheat and Barley Varieties for Arizona 2015
    Publication (PDF, 657KB)
    Authors: Dr. Michael J. Ottman
    Contains a list of some of the different varieties of Wheat and Barley. There is also a chart detailing some of the yield information relating to each of the varieties.
  • Sep 2015
    Nondormant Alfalfa Varieties for Arizona 2015
    Publication (PDF, 437KB)
    Authors: Mike Ottman
    This article contains a chart of non dormant alfalfa varieties for Arizona. Suggestions for determining an appropriate fall dormancy class, identifying potential pest problems, yield, and salt tolerance are all discussed.
  • Jun 2015
    Early Cotton Development
    Publication (PDF, 281KB)
    Authors: J. C. Silvertooth
    After stand establishment, the next critical stage in the development of a cotton crop is the initiation of the first squares, or floral buds, which could develop into the plants’ first boll. This is an important step for a cotton crop and one which is usually followed closely by the attentive farmer.
  • Jun 2015
    Water Management for Defoliation
    Publication (PDF, 316KB)
    Authors: Silvertooth, Jeffrey C.
    There are several factors which are important to consider in managing defoliation. Factors such as plant-water relations, Nitrogen (N) fertility status, the extent of honeydew deposits on the leaves from insects such as the sweet potato whitefly or aphids, and weather conditions following the defoliant application are all important in terms of the final defoliation results.
  • Jun 2015
    Soil Fertility and Soil Testing Guideline for Arizona Cotton
    Publication (PDF, 293KB)
    Authors: J. C. Silvertooth
    According to all available evidence, there are 20 total nutrients necessary for complete plant growth and development. Not all are required for all plants, but all have been found to be essential to some.
  • Jun 2015
    Soil Management and Soil Testing for Irrigated Cotton Production
    Publication (PDF, 436KB)
    Authors: J. C. Silvertooth
    Whenever studying cotton, it is a natural tendency to focus on the above ground portions of the plant. However, an equally important part of the plant is the root system, The soil is a focal point of any farming operation.
  • Jun 2015
    Early Season Crop Management
    Publication (PDF, 319KB)
    Authors: J. C. Silvertooth
    The approaches and techniques used to produce a cotton crop in Arizona can vary to some degree from county to county, or from farm to farm. However, one of the objectives that has become increasingly common across Arizona is that of achieving earliness with a crop.
  • Jun 2015
    Predicting and Mitigating Resistance Development in Whiteflies
    Publication (PDF, 655KB)
    Authors: Naomi Pier, Lydia Brown, Peter Ellsworth, John Palumbo, Yves Carriere, Al Fournier (University of Arizona); Steve Castle (USDA), Nilima Prabhaker (UC-R)
    Insecticidal resistance in whiteflies is a real problem, threatening economic and effective pest control. Research is being done on whitefly resistances to currently used chemical controls and the potential of usage patterns to contribute to the development of these resistances. Effective resistance mitigation begins with the application of the first principles of resistance management.
  • Jun 2015
    Estimating the Vegetative/Reproductive Balance in Cotton Growth
    Publication (PDF, 300KB)
    Authors: J. C. Silvertooth
    A healthy, well-developed cotton plant that is capable of high yield requires a strong root system, mainstem structure, sufficient leaves, and numerous fruiting branches to support a good boll load. Too small a vegetative structure on the plant results in reduced yield potential, and too much vegetative development, which is usually done at the expense of fruit set and yield.
  • Jun 2015
    Physiology of Cotton Defoliation
    Publication (PDF, 529KB)
    Authors: Felix Ayala and J. C. Silvertooth
    This bulletin deals with the physiology of cotton defoliation and attempts to describe what conditions must exist inside the plant in order for defoliation to occur. It is important to understand the basic physiological processes involved in order for best crop management practices to accomplish a successful defoliation.
  • Jun 2015
    Determining the Mainstem Node Number for Cotton
    Publication (PDF, 329KB)
    Authors: J. C. Silvertooth and Paul W. Brown
    To systematically monitor a young crop effectively, it is important to understand the fundamentals about counting and identifying nodes on the plant.
  • Jun 2015
    General Maturity Groups for Cotton Varieties
    Publication (PDF, 289KB)
    Authors: Silvertooth, Jeffrey C.
    Three maturity groupings are often used to classify cotton varieties, consisting of: 1) short season or more determinate plants, 2) medium season varieties, and 3) long or full season varieties which are more indeterminate in nature. Classification of cotton varieties into one of these three categories is not necessarily straightforward in all cases. In fact, it easily can become a process of “splitting hairs” when making maturity grouping designations for cotton varieties. Nevertheless, maturity designations are commonly assigned to most commercially available varieties, which can effect selection and management.
  • May 2015
    Irrigation of Small Grains in Arizona
    Publication (PDF, 532KB)
    Authors: Steve Husman and Michael J. Ottman
    Wheat and barley use about 2 ft of water in Arizona, but 3 to 3.5 ft of applied water is often required with surface flood irrigation due inefficiencies in the irrigation system. Some suggestion on how to irrigate your small grains are made, including when and how much.
  • May 2015
    Small Grain Growth and Development
    Publication (PDF, 443KB)
    Authors: Michael J. Ottman
    Small grain growth and development can be divided into several major and minor stages. This article discusses those stages and what to look as the crop develops. A chart also details the timing of management operations during crop development.
  • May 2015
    Fertilizing Small Grains in Arizona
    Publication (PDF, 454KB)
    Authors: Michael J. Ottman and Tom Thompson
    Nitrogen is the primary fertilizer nutrient required by wheat and barley. This article describes the optimum nitrogen fertilizer rate, nitrogen fertilizer scheduling, and how to boost grain protein content.

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Field IPM Shorts

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