Aphids

What are they?

Aphids are sap-sucking insects that range in size from ¼ inches or less. They are commonly called greenfly and blackfly, but some are yellow, pink, white or mottled. Some cover themselves with a fluffy white waxy secretion (wooly aphid) and should not be confused with mealybug or whitefly. Most aphids feed on foliage, stems and flowers but some suck sap from the roots.

 

Symptoms

  • Aphids are usually visible. Check shoot tips, flower buds and the underside of younger leaves.

  • Stunted tip growth – look at shoot tips for curled or distorted leaves.

  • Sticky, clear substance (honeydew) on leaves, stems, fruit, frequently followed by sooty moulds.

  • White cast skins of young aphids (frass) that accumulate on the upper side of leaves.

 

 

Control

Non chemical

Cultural – Monitor susceptible plants and be ready to implement control methods when necessary.

Physical - Squash them with fingers. Blast sturdy plants with water jets to dislodge.

Biological - Encourage natural enemies in the garden (ladybirds, hoverfly larvae, lacewing larvae and several parasitic wasps). Greenhouse growers can purchase these beneficial insects online.

 

Chemical Read manufacturer's instructions regarding restrictions on use and harvest intervals.

Contact - applied directly to insects; limited persistence, spray thoroughly and at regular intervals.

  • Py Garden Insect Killer

  • Scotts Bug Clear Gun for Fruit & Veg

  • Scotts Bug Clear for Fruit & Veg

  • Vitax Organic 2 in 1 Pest and Disease Control

  • Bayer Organic Pest Control

  • Westland Plant Rescue Fruit & Veg Bug Killer

  • Bayer Sprayday Greenfly Killer

  • Growing Success Fruit & Veg Bug Killer

  • Bayer Provado Ultimate Fruit and Vegetable Bug Killer

 

 

Systemic – absorbed into the plant, affect insect at feeding. Check label for harvest intervals

  • Bayer Provado Ultimate Bug Killer Ready To Use

  • Bayer Provado Bug Killer Concentrate 2

  • Scotts Bug Clear Ultra

  • Rose Clear Ultra and Bug Clear Ultra Gun

 

Treat deciduous fruit trees and bushes with a plant oil winter wash (Growing Success Winter Tree Wash or Vitax Winter Tree Wash) to control overwintering eggs.