Effective control options for boxwood leafminer include applications of neonicotinoids such as imidacloprid e g.
Boxwood leafminer fact sheet.
Severely shearing the foliage before adult emergence or after egg laying ends will reduce the overall population.
This fact sheet from clemson includes using spinosad for control when the leafminers are present in the leaves.
It is difficult to control the adult leafminers because of their short adult.
This is the most serious insect pest that attacks boxwood the leafminer is the larva immature form of a small orangish mosquito like fly.
Boxwood leafminer monarthropalpusi flavus is a common and destructive pest that causes significant damage to boxwoods here in the dayton area although the symptoms are often mistaken for winter injury rather than insect infestation since boxwoods are such a popular shrub it s important to control leafminers so they don t spread to neighboring plants and properties.
As always read and follow label directions paying particular attention to the protection of pollinators restrictions including delaying applications until.
Close up of boxwood leafminer larvae.
This should eliminate the need to use an insecticide.
Remove and destroy severely affected plants.
Spinosad is the least toxic to the environment.
Boxwood leafminers over winter as partially grown larvae in the leaf blisters.
Pruning boxwood back by about 1 3rd to remove the stems with infested leaves will help reduce this pest.
Merit marathon and generics and dinotefuran e g.
Insularis korean boxwood b colchica and pachysandra are susceptible.
Boxwood leafminer monarthropalpus flavus.
In may the adults force the pupal skin out of the mine where it hangs for a few days after the fly a gall midge.
Numerous pests and diseases may.
Dispose of the clippings.
Japonica japanese boxwood b.
Leafminers on boxwood shrubs.
Boxwoods buxus spp are enjoyed in a range of landscapes as hedges or screens background plantings topiary pieces and other uses.
See section titled insects related pests.
When the days warm in spring the larvae become active and grow rapidly feeding between the upper and lower leaves for the balance of the summer.
Microphylla littleleaf boxwood and var.