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2 <br /> <br />Weed Control Progress Report April 4, 2022 <br /> <br />Period from March 14 to April 4, 2022 submitted by Stan Wolf <br /> <br />New Business: <br /> <br />Bio-control Agents: Cass County Weed Control has collected Leafy spurge <br />flea beetles and distributed them to landowners every year since the LS flea <br />beetles were available. The LS flea beetles have been very successful in most <br />areas where introduced and landowners are still interested in acquiring LS flea <br />beetles. Weed Control will continue to collect LS flea beetles and provide to <br />landowners free of charge. <br /> <br />Weed Control has purchased Canada thistle stem mining weevils for several <br />years and distributed them in several areas within the county. Weed Control is <br />planning to scout the introduction sites for evidence of establishment. <br />Establishment of CT stem mining weevils has been variable in North Dakota, <br />usually taking several years to determine effectiveness. Weed Control will <br />closely monitor the release sites this summer to determine establishment of CT <br />stem mining weevils. <br /> <br />Spotted hemlock defoliating moths were purchased in 2021 and released in <br />several Spotted hemlock infestations. This summer the release sites will be <br />monitored to determine establishment rates. <br /> <br />CT stem mining weevils and S hemlock defoliation moths are again available <br />from Integrated Weed Control of Bozeman MT. Weed control staff recommend <br />purchasing 10 collections of CT stem mining weevils and 3 collections of S <br />hemlock defoliating moth to be released within the county. The proposed costs <br />are. <br /> <br /> Quantity per Price per Quantity <br />Bio-control release release purchase Total <br />CT stem mining weevils 105 $175.00 10 $1750 <br />S hemlock defoliating moth 150 $150.00 4 $ 660 <br /> Total $2350 <br /> <br />Proposed motion: Move to purchase 10 Canada thistle stem mining weevil <br />releases and 4 Spotted hemlock defoliating moths releases for a total of <br />$2350.00 plus shipping costs. <br /> <br /> <br /> <br /> <br /> <br /> <br />