Hobo spiders_Western and Central Montana (Horticulture/Urban IPM)
Description:

During late summer and early fall it is normal for spiders to enter buildings and homes. This includes hobo spiders which have long been prevalent in Montana. Common misconceptions about the hobo spider often cause unnecessary concern.


Alert Period: 08/08/2019 - 11/15/2019
Submitted By: Lauren Kerzicnik
Alert Documents:
Aspen blotch leafminer, Phyllonorycter sp._statewide (Horticulture/Urban IPM)
Description:

Aspens and cottonwoods are starting to show white blotches on the undersides of the leaves. The spots on the leaves are due to mining from the aspen blotch leafminer, which is a moth.


Alert Period: 08/01/2019 - 09/30/2019
Submitted By: Lauren Kerzicnik
Alert Documents:
Spotted-wing drosphila_statewide (Horticulture/Urban IPM)
Description:

The spotted-wing drosophila, Drosophila suzukii (SWD), is a pest of many ripe and overripe small fruits. It is currently established in Lake and Flathead Counties. In 2018, it was collected in Ravalli, Missoula, and Gallatin counties. Its presence in other counties, such as Yellowstone, is also suspected.


Alert Period: 07/19/2019 - 10/31/2019
Submitted By: Lauren Kerzicnik
Alert Documents:
Herbicide Carryover in Garden Amendments (Horticulture/Urban IPM)
Description:

The Schutter Diagnostic Lab is receiving garden vegetable samples showing symptoms consistent with synthetic auxin, also known as plant growth regulator, herbicide injury. In many of these cases, we suspect carryover of persistent herbicides in garden amendments such as compost, manure, or topsoil. See the attached document for more information. 


Alert Period: 06/26/2019 - 10/31/2019
Submitted By: Lesley Orloff
Alert Documents:
Home-invading weevils_statewide (Horticulture/Urban IPM)
Description:

Montana has several home-invading weevils that come into our homes starting in April and all the way through November. They are harmless to humans, are not wood-boring beetles, and are mostly just a nuisance in homes. These invasions are only temporary.


Alert Period: 05/20/2019 - 11/29/2019
Submitted By: Lauren Kerzicnik
Alert Documents:
It is tick season (Horticulture/Urban IPM)
Description:

It is tick season in Montana. The common ticks in Montana this time of the year are the Rocky Mountain wood tick, Dermacentor andersoni and the American dog tick, Dermacentor variabilis.


Alert Period: 05/03/2019 - 09/30/2019
Submitted By: Lauren Kerzicnik
Alert Documents: