WORLDWIDE

Vole Pest Control

Overview

Voles can be found in every state of the mainland U.S. and Canada. There are over 23 species Genus - Microtus in North America. Voles are frequently mistaken for shrews, field mice & deer mice. While similar, distinguishing features include longer, coarser hair, and a larger head size.

Restricted-Use Pesticide

DUE TO HAZARD TO NONTARGET ORGANISMS

For retail sale to and use only by Certified Applicators or persons under their direct supervision and only for those uses covered by the Certified Applicator's Certificate.

See entire label. It is the responsibility of the user to read and follow all label directions.

Vole Habitat Map

Vole Pest Control

Voles can often be found in wild and landscape environments with rock structures nearby.  Vole activity is more frequently visible during winter months and in the spring, immediately after snow melt.  Voles cause economic damage in many areas, some of the more important of which include:  Orchards, Commercial Nurseries, Christmas Tree Farms & Forestry Plantations. Rozol® Vole Bait is registered for use in these usage segments in most states.

Damage

Vole Pest Control

Vole root feeding in orchards

Vole Pest Control

Vole girdling damage to white pine

Vole Pest Control

Vole runway damage to turf

Vole Pest Control

Voles gnaw on tree trunks and roots (girdling) causing disruption of the tree’s flow of nutrients and water.

  • Voles can cause extensive damage to orchards, ornamentals and tree plantings by gnawing on roots and on the bark of seedlings and mature trees (called girdling).
  • Voles consume foliage, seeds, stems, bulbs and small roots, and girdle large roots, which disrupts the tree’s flow of nutrients and water. Voles can kill trees and smaller plantings, as well as cause foliage and production loss, and the onset of root disease by exposing vulnerable tissue and creating air pockets.
  • Because it occurs underground, root damage is harder to detect. By the time weak, unhealthy trees are noticed, root damage is often extensive. Trees experiencing root damage from voles exhibit stunting and foliage reduction,resulting in production losses.
  • In a 1987 study1 on McIntosh orchards in New York, vole densities of up to 400 per acre led to major production losses. During the second year, the highest vole population reduced fruit yield by 65.5% and increased undersized fruit from 3.1 to 57.5% – reducing income by $2,745 per acre.
  • Pine voles also build extensive runway and tunnel systems. In the Willamette Valley, voles inflicted varying degrees of damage on 40-50% of grass seed acreage (a $300 million a year crop),2 leading to stand loss as high as 60% in 2005.3
  • Meadow Voles (Microtus pensylvanicus) can cause unsightly runway damage to lawns & golf courses.

1 Effects of Differential Pine Vole Populations on Growth and Yield of McIntosh Apple Trees, Proc.EasternWildlife Damage Control Conference, 1987. Richmond, M.E., C.G. Forshey, L.A. Mahoffy and P.N. Miller.

2 Dave Pehling & Todd Murray (WSU Snohomish Co.)

3 Mark Mellbye Field Crop OSU Ext.Agent, Linn County, and Bruce Coblenz Prof.OSU Dept. of Fisheries &Wildlife, Bob Rost OSU Gardening Expert – OSU News 06-28-05

Alternative Methods of Vole Control

  • Wire mesh guards and plastic bands can be expensive and labor intensive to maintain. They may provide marginal protection against girdling, but do not protect against burrowing access and root damage.
  • Repellents such as Thiram (a fungicide) and Capsaicin (the ingredient that makes chili peppers hot) offer inconsistent data on effectiveness.
  • Fumigants are usually not effective because the complexity and shallow depth of vole burrow systems allow fumigants to escape. They are also very costly.
  • Anticoagulant rodenticides such as chlorophacinone (Rozol) and diphacinone are restricted-use products when used for vole control.

Rozol Vole Bait Usage Guide

Approved in all states except: CA, CO, FL, HI and the District of Columbia


Segments

Orchards

Vole Pest Control

Vole Pest Control

Vole Pest Control

Special Instructions/Directions for Use: For Vole pest control in pome fruit (apple, pear) and stone fruit (peach, cherry, apricot, plum, prune, and nectarine) tree orchards. Apply after fall harvest (including drops), before new spring growth, and during which three consecutive days of rain-free and snow-free weather are expected. Do not apply within 50 feet of any body of surface water or where raptors are actively feeding on voles. Do not apply over bare ground or crops not specified above. Do not allow animals to graze in treated areas. Do not use hay cut after application for feed or bedding. To avoid exposing nontarget organisms, follow the instructions in the "Pesticide disposal" section to ensure proper clean up of any bait for reuse or disposal. Apply only by hand spot baiting and ground broadcasting. Do not apply aerially. In Colorado, Florida, New York and Vermont, only apply by "Hand Spot Baiting."

Hand spot baiting: Place 1-1/2 ounces of bait in each active hole, trail or runway at each tree site (10 lbs./acre). Cover each placement with grass or shingle to avoid exposing non-target organisms, or place in a tamper resistant bait station.

Ground broadcast baiting: Using a commercial spreader, uniformly apply 10 lbs. per acre. If populations are high, make a second application 1-2 months after the fi rst. The maximum application rate is 40 lbs./acre per year for pine voles, and 20 lbs./acre per year for other voles. Ground broadcast is not permitted in CO, FL, NY or VT.

Aerial Broadcast

Specimen Labels and Safety Data Sheets

States Target Species / Use Pattern 24(c) SLN No. Labels SDS Usage Period Expires
WA Vole (Aerial-use) WA-070019 Labels SDS N/A 12-31-17
ID Vole (Aerial-use) ID-110001 Labels SDS N/A 1-31-19

To avoid exposing non-target organisms, clean up any bait in piles for reuse or disposal according to the “Pesticide Disposal” section of the product label.

Border Areas & Buffer Strips Adjacent to Crops

Vole Pest Control

Vole Pest Control

Vole Pest Control

Vole Pest Control

USE RESTRICTIONS: For Vole pest control in commercial nurseries, tree and forestry plantations, Christmas tree farms, and border areas and buffer strips adjacent to crops (within 100 feet of the edge of the cropland). This product must not be applied directly to food or feed crops except as specified above. Do not apply within 50 feet of any body of surface water or where raptors are actively feeding on voles. Do not allow animals to graze in treated areas. Do not use hay cut after application for feed or bedding. To avoid exposing non-target organisms, follow the instructions in the "Pesticide disposal" section to insure proper clean-up of any bait for reuse or disposal. Apply only by hand spot baiting and ground broadcasting. Do not apply aerially. In Colorado, Florida, New York and Vermont, only apply by "Hand Spot Baiting." In Florida, only use this product where Pine voles are known to occur and only apply by “Hand Spot Baiting.”

APPLICATION DIRECTIONS: Before application, locate vole trails, runway systems and harborage areas to be treated. Hand spot baiting: Place 1-1/2 ounces (6 tablespoons) of bait in each active hole, trail or runway (do not exceed 10 lbs. per acre). Cover each placement with grass or shingle to avoid exposing non-target organisms, or place bait in a tamper resistant bait station.

Ground broadcast baiting: Using a commercial spreader, uniformly apply 10 lbs. per acre. If populations are high, make a second application 1 - 2 months after the first. In states east of the Mississippi River, infestations of pine vole (Microtus pinetorum) may require higher application rates of 20 lbs. per acre. The maximum application rate is 40 lbs per acre per year for Pine voles, and 20 lbs. per acre per year for other voles.


Commercial Nurseries, Christmas Tree Farms, Tree & Forestry Plantations

Vole Pest Control

Vole Pest Control

Vole Pest Control

The same directions shown under Border Areas & Buffer Strips  Adjacent to Crops apply to the Commercial Nurseries, Christmas Tree Farms, Tree & Forestry Plantations segments shown above.


Lawns, Golf Courses, Parks, Other Ornamental Turf Areas, Ornamental Flower & Shrub Gardens

Vole Pest Control Vole Pest Control

Special Instructions:
Hand Spot Bait only:
Do not apply by aerial or ground broadcast. For Vole pest control (Microtus spp.) in lawns, golf courses, parks, other ornamental turf areas, ornamental flower and shrub gardens. Place 1/2 to 1 ounce, (2 to 4 tablespoons,) of bait in each active hole, trail or runway in areas where voles have been observed or are known to forage. If non-target animals/birds are present, place bait in tamper-resistant bait stations. Also apply under tarps used to provide winter protection for turf areas. Apply only one bait spot per trail or runway. If additional vole control is needed, a second application may be made 1 to 2 months after the first application. The maximum application rate is 10 lbs per acre per application, and 20 pounds per acre per year. Do not apply to golf courses or turfgrass areas in the state of California.

Specimen Labels and Safety Data Sheets

Product Information Labels (Eng) SDS (Eng) Labels (Spa) SDS (Spa)
Vole Bait (RUP) Labels (Eng) SDS (Eng) Labels (Spa) SDS (Spa)

Literature

Vole Taxonomy & Behavior / Technical Sheet

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