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Field Crop Publications

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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.
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.
May 2003

Cross-commodity Guidelines for Neonicotinoid Insecticides in Arizona

Publication (PDF, 175KB)

Authors: John C. Palumbo, Peter C. Ellsworth, Timothy J. Dennehy, Robert L. Nichols

This document outlines some of the guidlines for Neonicotinoids, which were relatively new at the time. The plans within the document aim to help keep Neonicotinoids as a cost efficient and effective form of whitefly management for the future.
Aug 1998

Alfalfa Aphid Complex

Publication (PDF, 83KB)

Authors: Tim C. Knowles

Aphids feed in groups, often on the growing tips of plants. This article describes the complex of Aphids that can be found on alfalfa and discusses damages, monitoring, control, and when to treat for them.

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