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Pests & Diseases
Home page of the pest, disease and weed department.
Every week something is attacking your plants. Check them out and be prepared to deal with the situation.
Identify the weeds giving you trouble and learn how to deal with them.
Simple search facility to help track down whatever is bugging you.
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Name search.
Use the search box on the left if you know the name of the pest you are looking for. The first result will load into the panel below and any other matches are listed in the right-hand panel. Only common names loaded at present.
Symptom search.
Result will be displayed below. Please scroll down to view.
If you have a sick plant with no obvious cause present, use the search box on the right entering one or two words describing the problem. Simple phrases like 'leaves eaten' or single keywords like 'yellow' work best. As with the name search, matches are listed in the right column and displayed in the panel below.
Search Results.
1 results found.
Rose sawfly larve
- Pest type - Insect larve
- Infects - Foliage,
- Host plants- Rose,
- Symptoms- Leaves eaten to skeleton:
Often called the skeletonizer due to the larves habit of eating all the leaf except the prominent ribs, this small caterpillar-like larve is well camouflaged and difficult to spot. The adult sawfly is noticable for its bright yellow abdomen, but causes no harm to the plants.
The larve have voracious appetites and rapidly denude rose bushes of their foliage. There is usually several generations following in quick succession but the damage done is usually more of an annoyance than significant.
The best treatment is to wait until the flush of flowers is over, then prune fairly hard removing all the larve in the process. Insecticide sprays will also rid the bushes of their unwelcome hosts, but may kill the beneficial predator insects as well.