What does a white pine weevil look like?
The adult is a small rust-colored weevil that is about 4-6 mm long. It has irregularly shaped patches of brown and white scales on the front wings. Near the apex of the front wings is a large white patch. Like most weevils, the adult has a long snout-like beak from which small antennae arise.
What do white pine weevil eat?
Finally, the larvae will build pupal cells in the stem, where they remain inactive for five to six weeks. They emerge as adults from late July until early September. The adults will feed on nearby tree branches until it is time to move to the duff for over-wintering.
How do you get rid of weevils in a tree?
Vine Weevil Control
- Remove mulch and other hiding places from around plants and water only when necessary (larvae and adults prefer moist soil).
- As non-flying insects, weevils travel from plant to plant by walking.
- Apply 100% organic Diatomaceous Earth for long-lasting pest protection.
What is killing white pine trees?
White pine blister rust (WPBR) kills branches, tree tops and whole trees of Eastern white pine and causes leaf spots and leaf loss in currant and gooseberry plants. WPBR can be found throughout Minnesota but is most common in northern and eastern Minnesota where cool moist conditions in late summer favor infection.
What kills white pine weevils?
Recommended material include cyfluthrin (sold as Bayer Advanced Yard and Garden Spray), when the adults first emerge from leaf litter in early to mid-April. Cyfluthrin has been shown to be highly effective against white pine weevil in Christmas tree plantations. Professional applicators may use Tempo (cyfluthrin).
How do I get rid of white pine weevils?
The standard approach to manage white pine weevil is to spray insecticides in spring so that they cover the terminal. This treatment is directed at the overwintered adults to kill them before they lay eggs.
What insecticide kills white pine weevil?
Do weevils harm trees?
Weevils usually do not attack trees less than 4 to 5 years old, or less than 3 feet tall. Infested trees exhibit a wilting and browning leader, usually by July. Weeviled trees eventually develop two leaders and a bushy appearance, thus reducing the value of ornamental trees. Trees are rarely killed by the weevils.
How do you treat white pine weevil?
What insecticide kills weevils?
Novacide
Novacide is our top recommended insecticide to control weevils in that can kill adult weevils and comes with an IGR (or Insect Growth Regulator) which affects weevil larvae and eggs. The best part about Novacide is its residual effect as it can remain effective for up to 7 months so you don’t have to apply often.
How do I get rid of white pine weevil?
What does white pine weevil do?
The white pine weevil (Pissodes strobi) produces a conspicuous injury to the terminal growth of spruce trees. In late spring, new growth wilts and dies back. The affected terminals wilt into a ‘shepherd’s crook’ form and the needles often become lighter colored before they ultimately die and drop.