Whiteflies

Karen Delahaut, formerly UW-Madison Fresh Market Vegetable Program Revised:  4/26/2004 Item number:  XHT1127 Whiteflies are not true flies although they look fly-like.  They actually belong to the same order of insects as scales, aphids, and mealybugs: the order Homoptera.  There are several species of whiteflies that can infest greenhouses including the greenhouse (Trialeurodes vaporariorum), sweet […]

Wireworms

Authors: David Lowenstein and Russell Groves, UW-Madison Entomology Last Revised: 05/22/2020 X-number: XHT1045 Wireworms are the larvae of several species of click beetles (Family Elateridae).  These beetles flip into the air with an audible click when turned on their backs.  Wireworms feed primarily on grasses (including grass crops such as corn) but have a broad host range that […]

Asparagus Beetle

Karen Delahaut, formerly UW-Madison Fresh Market Vegetable Program Revised:  1/12/2005 Item number:  XHT1137 The common asparagus beetle (Criocercis asparagi) and spotted asparagus beetle (Crioceris duodecimpunctata) are annual pests of asparagus in Wisconsin.  The common asparagus beetle is the more prevalent of the two species and the only one that causes economic damage to asparagus in […]

Cabbage Maggot

Authors: David Lowenstein and Russell Groves, UW-Madison Entomology Last Revised: 05/22/2019 X-number: XHT1030 The cabbage maggot (Delia radicum) is an early season pest of cruciferous/cole crops (e.g., cabbage, broccoli, Brussels sprouts, cauliflower, kohlrabi, rutabaga, turnip, and radish), as well as cruciferous weeds (e.g., wild mustard, water cress, wild radish). Cabbage maggot damages plants by feeding […]

Imported Cabbageworm

Karen Delahaut, formerly UW-Madison Fresh Market Vegetable Program Revised:  5/28/2004 Item number:  XHT1032 The imported cabbageworm (Pieris rapae) is a lepidopteran insect and the most important cole crop pest in Wisconsin.  All cole crops, including cabbage, broccoli, Brussels sprouts, cauliflower, and rutabaga, are susceptible to attack by this insect. Appearance:  Imported cabbageworm adults are the […]

Diamondback Moth

Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised:  5/28/2004 Item number:  XHT1031 The diamondback moth (Plutella xylostella) is a lepidopteran insect and an important pest of cole crops in Wisconsin.  All cole crops, including cabbage, broccoli, Brussels sprouts, cauliflower, and rutabaga, are susceptible to attack by this insect. Appearance:  The diamondback moth is a small, […]

Hornworms

Author: Russell Groves, UW-Madison Entomology Last Revised: 05/01/2020 X-number: XHT1107 Tomato hornworms (Manduca quinquemaculata) and tobacco hornworms (M. sexta) are large, blue-green caterpillars (larvae) with a spine (horn) on the posterior (rear) end.  These insects do not typically cause significant damage in commercial vegetable fields.  However, large numbers of larvae can occasionally occur in home gardens, leading to […]

Safely Using Manure in the Garden

Steven Ingham, UW-Madison Food Science Revised:  1/5/2007 Item number:  XHT1143 Many vegetable gardeners swear by the benefits of manure as a fertilizer.  Adding manure to soil improves the soil’s texture and water-holding capacity while providing nutrients needed by growing plants.  Unfortunately, fresh manure can also contain bacteria that can contaminate vegetables and cause human disease.  […]

Extending the Garden Season

Cold frames and hot beds, hoop houses, cloches, and floating row covers allow gardeners to grow plants earlier in spring and later in fall. Although these structures are used primarily for growing vegetables, they may be used for growing ornamentals, including flowering plants, as well.

Dodder

Jennifer Clifford, Amilcar Sanchez, Trenton Stanger, and Brian Hudelson,UW-Madison Plant Pathology Revised:  10/21/2006 Item number:  XHT1156 What is dodder?  Dodder is the name of several species of parasitic plants that are widely distributed in North America and Europe.  Plants parasitized by dodder include alfalfa, carrots, onions, potatoes, cranberries, a variety of herbaceous and woody ornamentals, […]

Rain Barrels

Mike Maddox, State Master Gardener Program Manager & Darren Lochner, Formerly of the UW-Extension Lower Chippewa River Basin Revised:  2/5/2008 Item number:  XHT1157 What is a rain barrel?  A rain barrel can be any large container designed to collect rain water.  Typically, rain barrels are placed at the bottom of downspouts in order to collect […]

Cicada Killer Wasps

Phil Pellitteri, UW Insect Diagnostic Lab Revised:  1/4/2011 Item number:  XHT1198 Cicada killer wasps have become very common in the southern half of Wisconsin.  These solitary wasps are up to 1½ inches long, and their black and yellow coloring makes them look like giant yellow jackets. Life Cycle:  Adult cicada killer wasps appear from mid-July […]

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