A five year study was conducted with the goal of identifying planting windows during the season when lettuce is at risk from aphid infestations. The studies indicate that planting date and temperature likely have a strong influence on seasonal abundance of aphids.
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.
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.
Lepidopterous Larvae Management in Desert Produce Crops, Oct 2015
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 respectively. There is also a brief note for each of the insecticides.
This is a document from the United States Court of Appeals. This case is a challenge to the EPA’s approval of insecticides containing sulfoxaflor, which initial studies showed were highly toxic to honey bees
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.
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.
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.
Insect Management on Desert Vegetables and Melons: Whiteflies 2015
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.
Biology and Management of Fusarium Wilt of Lettuce
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.
Evaluation of Clothianidin Seed Treatments for Bagrada Bug Control in Broccoli
With the outbreak of the Bagrada bug, it was estimated that they infested more than 80% of the acreage in Arizona between 2010-2014. This article outlines an expirement on the use of Clothianidin seed treatments as a way to manage the Bagrada Bug pest. The results indicated that this treatment was effective.
2015 Guidelines For Whitefly / CYSDV Management on Melons
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.
A total of 19 surveys were completed in the 2015 workshop, representing an estimated
total of 25,905 fall acres and 26,255 spring lettuce acres from Yuma and neighboring Imperial County. This article concludes that the local produce industry has made great strides in minimizing environmental impacts in lettuce production. There have not been any major reports of field failures.
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.
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.
ARIZONA PEST MANAGEMENT CENTER
University of Arizona College of Agriculture and Life Sciences Maricopa Agricultural Center