Pecan IPM Toolbox:  Insect Monitoring and Control

Introduction

• Economic Species
• Pecan Nut Feeders
• Pecan Foliage Feeders
• Survey Methods and Action Levels

Obscure Scale Control

• Scale Weakens Trees
• Scale Attacks Unsprayed Trees
• Survey Scale in Dormant Season
• Dormant Oil or Insecticide?
• Applying Dormant Oil
• Good Agitation is Important
• Correct Air Temperature
• Thorough Coverage
• Obscure Scale Survey and Action Level

Phylloxera Control

• Phylloxera Damage is Progressive
• Phylloxera Moves Slowly
• Survey Phylloxera in May
• Survey Each Native Tree for Phylloxera
• Survey Each Variety for Phylloxera
• Treat Pecan Trees at Budbreak for Phylloxera
• Phylloxera Survey and Action Level

Leaf Tatterer and Defoliator Control

• Spring Leaf Feeders Are Sporadic
• Leaf Tatterer and Defoliator Survey and Action Level

Pecan Nut Casebearer Control

• First Generation PNC Control
  • First Generation PNC Appears in May
  • Timing is Critical
  • Check for Egg Lay
  • Tag Clusters with Eggs
  • Extend Spray Residual
  • First Generation Pecan Nut Casebearer Survey and Action Levels
• Second Generation PNC Control
  • Larger Nuts by Mid-June
  • Two Eggs Per 100 Clusters
• Third Generation PNC Control
  • Large Nuts Can Be Direct Loss
• Second and Third Generation Pecan Nut Casebearer Survey and Action Levels
  
  
• A Temperature Prediction Method for PNC Adult Activity
  • Prediction Method
  • Temperature Versus Calendar
  • Base Temperature 38°F
  • Indication for Cluster Inspection
  • Day Degree Accumulations Table
  • Steps for Using Day Degrees as a Prediction of PNC Adult Emergence

Fall Webworm Control

• Rarely Economical
• May Attack Unsprayed Trees
• Spot-treat Colonies
• Penetrate Webbing with Spray
• Fall Webworm Survey and Action Level

Walnut Caterpillar Control

• Environmental Restraints
• Eggs
• Larvae
• Ten Colonies Per Acre
• Survey at 3-week Intervals
• Survey Eggs and Feeding Colonies
• Economic Threshold
• Treat Before 4th Instar
• Walnut Caterpillar Survey and Action Level

Stinkbug and Plantbug Control

• Several Species Responsible
• Two Types of Damage
• Migration into Pecan Trees
• Keep Vegetation Down
• Check Nut Drop for Damage
• Inspect Clusters for Adults
• Survey and Action Level

Yellow Pecan Aphid Control

• An Annual Problem
• "Honeydew"
• "Sooty Mold"
• Damage Affects Current and Next Year's Crop
• Survey Foliage for Action Level
• Beneficials Helpful
• Survey and Action Level

Black Pecan Aphid Control

• Premature Defoliation Causes Crop Reductions
• Low Action Level
• Feeding Damage
• "Blotching" Good Indicator
• Survey and Action Level

Mite Control

• Many Species
• Feeding
• Leaf Bronzing
• Outbreaks Possible
• Resistance to Chemical Control
• Survey and Action Level

Hickory Shuckworm Control

• Nature of Damage
• Biology and Identification
• Nut Drop and Shell Hardening
• History of Damage and Treatment
• Survey and Action Level

Pecan Weevil Control

• Damage Reduces Yields
• Identification
• Biology
• Control Adults Before Egg Lay
• Monitor Adult Weevil Emergence
• Limb Jarring
• Emergence Cones
• Population Density Economics
• Emergence Cone Replacement
• Knockdown Sprays
• Nut Development Important
• Timing Treatments
• Monitor Through Shucksplit
• Weevils Delayed by Drought
• Survey and Action Level
• Adult Pecan Weevil Trap Construction Plans

 

Back to Main Menu