Alfalfa is an important crop grown in Arizona with approximately 250,000 acres in production in 2011 and 2012 and 260,000 acres for 2013. As alfalfa stands age, they can thing and decline in plant density. This article takes a look at renovating alfalfa stands in Arizona.
Nutrient deficiencies can be identified in field through visual observations. However, additional analysis, either plant or soil testing is often necessary to confirm nutrient stress. The following is a quick-reference flow chart that can be used in field to identify potential nutrient deficiencies. Each nutrient has unique deficiency symptoms. Deficiencies will appear in many ways. It can be confused with other plant problems like pathogens or spray damage. But nutrient deficiencies can often be recognized because they tend to form symmetrical patterns, where both sides of leaf or plant parts show the same pattern.
Recommendations for Growing Standard-Height Wheat Varieties in Arizona
Until the introduction of semi-dwarf wheat in the late 1960s, wheat varieties were typically one and a half to two times their current height. Most "standard height" wheat varieties are adapted to lower-input conditions, and cannot tolerate high-fertility environments without lodging. Planting date, seeding rate, nitrogen rate, phosphorus rate, and irrigation are discussed in this article.
“Summer slump” is a decline in growth of alfalfa usually beginning in July in areas where maximum daily temperature exceeds 100 °F, such as the low elevation deserts of Southwestern U.S. This article discusses some of the causes behind this and potential impacts.
New Insecticides for Desert Produce and Melons 2013
This document outlines some of the new insecticides for desert produce and melons around 2014. Sequoia (Sulfoxaflor), Torac (tolfenpyrad), Exirel/Verimark (Cyazypyr), and Sivanto (flupyradifurone) are listed. Their relative eficacy against whiteflies aphids, bagrada bugs, and other insects are compared to the respective IPM standard.
Pest Abundance on Desert Produce and Melon Crops in 2013
This document contains a number of charts and graphs detailing information relating to the abundance of Whitefly, Bagrada bugs, Beet Armyworm, and Cabbage Looper. There are also a few figures relaying temperature information.
This documents contains an in depth guide to identifying Aphids most commonly found in Arizona produce. There are many images present to aid in identification. Aphid types include: Lettuce Aphid, Foxglove Aphid, Green peach Aphid, and Potato Aphid.
Forage sorghums are warm-season, annual grasses that have the potential to produce large amounts of nutritious forage during summer months, especially in lower-elevation deserts, like central Arizona. If managed properly , sorghum can be used as supplemental feed during times of inadequate forage production or can be used as an emergency , late-planted crop to replace a primary crop that has been damaged by wind, hail or drought early in the growing season.
Whitefly Management in Leafy Vegetables, Cole Crops and Melons- Fall 2013
A chart detailing various insecticides and the efficacy against Whiteflies for fall produce. Each insecticide is rated at Good, Fair, and Poor, and is shown for both the Adult and Nymph stage. There is also a brief note for each of the insecticides.
Lepidopterous Larvae Management in Desert Produce Crops, 2013
A chart detailing various insecticides and the efficacy against Lepidopterous Larvae. Each insecticide is rated at Good, Fair, and Poor, and is shown for Beet armyworm, Cabbage looper, and Corn earworm and Diamondback moth. There is also a brief note for each of the insecticides.
Preventing adult Bagrada bugs from feeding on plant terminals and small cotyledons is critical to establishing and maintaining a quality stand. This paper explores the relative efficacy of conventional insecticides, pyrethroids, neonicotinoids, and expiremental insecticides.
Insect Management on Desert Produce and Melons: Pests at Stand Establishment 2013
There are many insects that can be found on Desert Produce and Melons. This Article covers the description, damage, and Management/Control of the following insects:
Flea Beetles, Darkling Beetles, Field crickets, Saltmarsh Caterpillar, Ground Beetles, and Rove Beetles.
One of the challenges in using surface irrigation systems is determining the effective amount of water applied to a field. To get a good estimate, you must first calculate the gross amount of water applied and then, taking into system efficiencies, determine the amount of effective water applied (what the plants actually receive).
Area wide Incidence of Whiteflies and CYSDV In Fall Melons in Yuma County, 2007-2012
Authors: John C. Palumbo, Kurt Nolte, Yves Carriere
This is a summary of a recently completed project that was designed to survey the area wide incidence of Bemisia whiteflies and Cucurbit Yellow Stunting Disorder Virus (CYSDV) in commercial melon fields throughout the Yuma Arizona growing region.
Stink bugs in cotton, alfalfa, and other Arizona crops
In Arizona, we have many species of stink bugs; the species pictured above are encountered in cotton, alfalfa, and other crops. Some are occasional or potential pests of cotton. In the article the Brown Stink Bug (BSB), Eushistus servus, is discussed which has been a pest of cotton, especially in the past few years.
Insect Management on Desert Vegetables and Melons: Whiteflies - Jun 2013
This article describes the sweetpotato whitefly (SWF) in great depth and their relation to Desert Vegetables and Melons. It includes it's history of development and damages it has caused. The article also describes the management of SWF, including sampling/monitoring, natural/biological control, cultural practices, and insecticidal control.
Knockdown and Residual Control of Bagrada Bug with Foliar Insecticides on Broccoli
This document contains a list of Foliar Insecticides for use on Broccoli. The main categories are Conventional Chemistry, Experimental Chemistry, and Organic Chemistry They list the efficacy in the range of good, fair, or poor.
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.
Operation of Yield Monitors in Central Arizona: Grains and Cotton
Yield maps can be an important management tool to quantify the impact of management practices including water, fertility, pest control, variety selection, etc. Yield monitoring technology provides farm managers with information to improve input utilization, therefore many guidelines for their use are available online, including university cooperative extension bulletins for grain crops, and cotton.
ARIZONA PEST MANAGEMENT CENTER
University of Arizona College of Agriculture and Life Sciences Maricopa Agricultural Center