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Dealing with Rhubarb Pests

Gardening Guide: Remarkable Rhubarb

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Dealing with Rhubarb Pests

By Norann Oleson

Back of a rhubarb leaf covered in aphids

Back of a rhubarb leaf covered in aphids

Pests on your rhubarb, left unchecked, can damage and destroy your developing plants. Keeping a close watch on your plants during regular daily inspections will help you spot any pests before they can do irreparable harm. Healthy rhubarb can bounce back from pest damage if you catch the pests quickly.

A couple notes about prevention:

  • Don’t overwater.
  • Use floating row covers when plants are young.
  • Place sticky traps to catch pests early.
  • Don’t use manure or mulch in areas prone to slugs.

Spot the symptoms of rhubarb plant pests

Check leaves, stalks, and crowns for these symptoms that come from pests on the prowl.

On Rhubarb Leaves and Stems

Symptoms Pest
Curling or wilting leaves Black bean aphid
Chewed leaves Flea beetle
New plantings have leaf damage Tarnished plant bug
Leaves cut off near stem Cutworms

 

On Rhubarb Stalks, Crowns, or Roots

Symptoms Pest
Holes in stalks or crown Rhubarb curculio; stalk borers; potato stem borer; cutworms
Roughened surface of stalks Slugs

 

How to treat pests on rhubarb

Here are some proven ways to get rid of pests on your rhubarb. Choose the best treatment for the type of pests invading your plants.

  • Pick off the pests. Use your garden gloves to remove the pests by hand. After removal, destroy pests by drowning them in a bucket of soapy water or crushing them with your foot. Handpicking isn’t efficient or practical for very small pests but works well with larger pests.
  • Blast them. If you spot invaders like aphids, give them a good blast with the garden hose. Chances are good the neighborhood birds will notice and come eat your pests.
  • Apply insecticidal soap. Insecticidal soap is organic. The potassium salts in insecticidal soap help remove an insect’s protective waxes, causing destruction of insect membranes and killing them. Mix the soap with water to create your solution and apply directly to insects on any plants. While insecticidal soap is less apt to affect other organisms, certain plants might be sensitive to the soap and can suffer leaf burn.
  • Apply horticultural oils. Combine plant- or petroleum-based oils with water to produce horticultural sprays. Neem oil, for instance, is derived from seed extracts of the neem plant. Oil-based sprays block an insect’s air holes, interfere with an insect’s metabolism, disrupt insect feeding, and inhibit insect growth. Like insecticidal soaps, horticultural oils can cause plant injury if not properly diluted.
  • Make your own pest spray. You can make your own pest spray with benign materials. Mix 1 tablespoon of baking soda, 1/2 teaspoon of a mild dish detergent, and 2 1/2 tablespoons of olive oil in a gallon of water to make a solution that will repel all kinds of bugs, as well as a fungicide for blight and mildew on rhubarb plant leaves. Shake it well in your bottle before spraying and repeat every week for it to be continuously effective.
  • Diatomaceous Earth (DE). Sprinkle DE at base of plants and between plants. Many pests cannot cross over this barrier without dying.

Do pests attack your rhubarb every year? How do you handle removing them—and even preventing them in the first place? Please tell us how you treat your rhubarb to avoid pests.

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plant pests, rhubarb, rhubarb plant

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TABLE OF CONTENTS

  • Curator’s Corner
  • Introduction
  • Types of Rhubarb
  • Growing Rhubarb from Seeds or Crowns/Splits/Sets/Divisions
  • Sun and Soil Requirements for Growing Rhubarb
  • Planting Rhubarb in the Ground or in Raised Beds
  • Growing Rhubarb in Containers
  • Watering, Weeding, and Fertilizing your Rhubarb Plants
  • Harvesting your Rhubarb
  • Storing and Preserving Your Rhubarb
  • Preparing Your Rhubarb for Winter
  • Dividing Rhubarb
  • Forcing Rhubarb
  • Dealing with Rhubarb Diseases
  • Dealing with Rhubarb Pests
  • Essential Tools and Equipment for Growing and Enjoying Rhubarb
  • Plant Profiles

  • Canada Red Rhubarb
  • KangaRhu Rhubarb
  • Crimson Red Rhubarb
  • Sunrise Rhubarb
  • Riverside Giant Rhubarb
  • Victoria Rhubarb
  • Recipes

  • Rustic Rhubarb Salsa
  • Rhubarb Tea
  • Rhubarb Comfort Crumble
  • Rhubarb Sauce Your Way
  • Rhubarb Fool
  • Classic Rhubarb Pie
  • Additional Articles

  • Nutrition Facts about Rhubarb
  • Health Benefits and Home Remedies of Rhubarb
  • Resources about Rhubarb
  • Rhubarb Glossary
  • Related Articles

  • Dividing Rhubarb: Splitting, Transplanting, and Methods for Moving

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