Citrus

Citrus Publications

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.
Jun 2018

Pecan Bacterial Leaf Scorch

Publication (PDF, 1.21MB)

Authors: Jiahuai Hu

Pecan bacterial leaf scorch (PBLS) is an important and chronic disease that affects pecan in Arizona, as well as other pecan production regions of the United States. This article discusses the disease.
Jun 2015

Citrus Fertilization Chart for Arizona

Publication (PDF, 433KB)

Authors: Glenn Wright

Provides a chart to help one estimate how much fertilizer a citrus tree needs based off of the nitrogen content of the fertilizer.
Aug 2011

Diseases of Citrus in Arizona

Publication (PDF, 3.99MB)

Authors: Mary Olsen, Mike Matheron, Mike McClure and Zhongguo Xiong

Many diseases of citrus have been described world wide and have colorful and descriptive names such as: blue mold, green mold, gray mold, pink mold, pink nose, brown rot, black spot, black rot, black pit, yellow vein, yellow spot, rubbery wood, lumpy rind, curly leaf, corky bark, slow decline, spreading decline, and stubborn. This article secribes some of the diseases common to Arizona
Apr 2009

Diagnosing Home Citrus Problems

Publication (PDF, 8.47MB)

Authors: John Begeman, Glenn Wright

A collection of pictures that can be used to help diagnose citrus problems. This includes diseases, stresses and pest injury.
Jul 2008

Pruning Citrus

Publication (PDF, 1.96MB)

Authors: Glenn C. Wright, Jack Kelly

Pruning is a common task necessary for best production of many common fruit trees. Most types of deciduous trees are pruned to invigorate the tree, to improve branch configuration, and thus make branches less likely to split under a heavy crop, to improve fruit quality, and/or to reduce the crop load which will improve the potential size of individual fruits.
Feb 2000

Irrigating Citrus Trees

Publication (PDF, 178KB)

Authors: Irrigating Citrus Trees

Water is essential for citrus trees.This article discusses some of the symptoms of stresses caused by lack of water and gives suggestions on how to estimate and time water applications on citrus trees.
Apr 1998

Low desert Citrus Varieties

Publication (PDF, 98KB)

Authors: Michael Maurer, Lucy Bradley

This article lists Citrus Varieties and discusses some of their characteristics. Some varieties grow better in Arizona than others and some suggestions considering some of the varieties are raised. Harvesting times are shown in a chart.
May 1991

Nitrogen Management Guide for Citrus

Publication (PDF, 136KB)

Authors: Thomas A. Doerge, Robert L. Roth, Bryant R. Gardner

The level of nitrogen fertility has more influence on the growth and yield of Citrus than any other single plant nutrient because it is the nutrient most often deficient in Arizona soils.

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