New December 2003

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Contents

• Control of vine weeds
• Balloonvine
• Burcucumber
• Dodder
• Field bindweed
• Honeyvine milkweed
• Japanese honeysuckle
• Japanese hops
• Japanese knotweed
• Kudzu
• Morningglories, annual
• Morningglory, bigroot
• Poison ivy
• Redvine
• Trumpetcreeper
• Virginia creeper
• Wild buckwheat

Related pages

• G4875, Control of Perennial Broadleaf Weeds in Missouri Field Crops
• G4880, Poison Ivy Identification and Control
• G6750, Home Lawn Weed Control
• IPM1007, Practical Weed Science for the Field Scout: Corn and Soybean
• IPM1014, Noxious Weeds of Missouri
• IPM1019, Caterpillars in Your Yard and Garden
• IPM1023, Missouri Weed Seeds
• NCR33, Vine Weeds of the North Central States

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Vine Weeds of Missouri

Japanese hops (Humulus japonicus)

Several obvious and annoying features of this aggressive, sprawling weed make it easy to recognize. The stems are armed with downward pointed prickles that make the plant cantankerous to handle, and the leaves cause dermatitis in sensitive individuals. Leaves of Japanese hops are distinctly 5-lobed, 2 to 4 inches in length and have petioles that are up to 8 inches long. The texture of the leaves is similar to sandpaper. Japanese hops have rather inconspicuous, green flowers, which lack petals and have a waddedpaper appearance.

Another vine weed that could possibly be confused with Japanese hops is burcucumber. Burcucumber also has mostly 5-lobed leaves; however, it has tendrils and Japanese hops do not. Burcucumber does have sticky-hairy stems but does not possess the downward pointing prickles that are characteristic of Japanese hops.

IPM1021, new December 2003