Leaf Eating Pests

 

Information

• Leaf eating pests are insect that chew or consume plant tissue
• Natural insect repellent can be used in some cases
• Finding holes in the leaves of a plant means its sometimes easier to identify the creature/pest

 



• Sawflies chew holes that don't go all the way through the leaf, making it look intact but transplant. they have to killed by insecticides.

Sawflies

• Leaf miners burrow twisting tunnels across leaves another one to use insecticides against

Leaf Miners

• Sucking insects poke tiny holes in to leaves drawing the nutrition out of them. some examples includes aphids, squash bugs and spider mites. sucking insects can breed rapidly therefore you must act rapidly in order to get fully rid of the pests.

Spider Mites

• Slugs and snails will also feed on the plant leaves. However this is normally controlled by the natural food chain

Snail and Slug

Other animals:

• Wood Pigeon
• Ducks
• Geese
• Rabbits
• Hares
• Small rodents
• Deer

Stem-Borrowing Pest

Classification

• These live within the plants stem, often found stunting growth or killing the apical meristem.
• May also infect the roots and leaves
• May be a disease vector

Nematodes

• Stem Nematodes include Ditylenchus and Aphelencoides spp.

Diagram of Ditylenchus Dipsaci



• plant pathogenic nematode that primarily infects onion and garlic. It is commonly known as the stem nematode, the stem and bulb eelworm or onion bloat.
• Live in the roots of the plants to infect their host.
• Symptoms of infection include stunted growth, discoloration of bulbs, and swollen stems.

Coleoptera

Cabbage Stem- Weevil
 

• There's species are more often seen from spring to autumn
• The larvae develops in the stems of the brassicas and then continues its feed from there.
• Widespread throughout England and Wales
• Control used to reduce the amount is by seed treatments of gamma-HCH or Sprays of gamma-HCH, Azinphos-Methyl, Azinphos-methyl + demeton-s-methyl sulphone, chlorpyrifos or triazophos. (GRAHAM and GOULD, 1980)

Diptera

Frit Fly Life Cycle Showing that it is constantly living throughout the seasons

 

• The Frit Fly usually white, yellow and black and are often found in grassy areas.
• They cause damage to new turf by destroying the stems of ryegrass, fescues and bents (use of larvae)
• Adult Flies are attracted to white objects and if a sighting of a large number of these flies could indicate larvae
• Larvae dig tunnels, infect stems and stay through winter
• Fruit Flies can be controlled by chemical sprays

Lepidoptera

Rose Stem Girdler (Species Unknown)

 

• Metallic wood boring beetle
• Flathead larvae is the known youngling of the group they cause the most damage to the rose by borer tunnelling within the pithy centre of the stem.
• Swollen, gall-like area on canes
• Canes with wilted, dried leaves
• Upper portions of canes break off easily during the summer
• Tunnelling in the lower part of the cane
• Boring damage and galleries inside of the cane
• CONTROL; insecticides to kill any larvae and eggs, remove infected plants over the season and over winter  

references;

GRAHAM, C. and GOULD, A. (1980). Cabbage stem weevil (Ceutorhynchus quadridens) on spring oilseed rape in Southern England and its control. Annals of Applied Biology, 95(1), pp.1-10.