University of Idaho Extension Shopping Cart. University of Idaho Extension Extension Publishing. A comprehensive guide to weed management in the Pacific Northwest.
Covers biological weed control agents, pesticide safety and disposal, agrichemicals and their properties, and control of problem weeds.
Contains sections on weed control in cereal grain crops; grass seed crops; forage and seed crops; legumes; oils and fiber; corn; hops; potatoes; sugar beets; aquatics; forestry; orchards and vineyards; small fruits; vegetable crops; vegetable seed crops; Christmas trees; nursery, greenhouse, and bulb crops; professional landscape maintenance; turfgrass; home landscapes and gardens; pasture and rangeland; and non-cropland and right-of-way.
In each section, products are listed along with application rates, timing, and other remarks. Includes a glossary, conversion tables, chemical application calculations, and a full index. The handbook is updated biannually March and August.
Individual articles are revised once a year. Revision dates are listed at the beginning of each article and in the mini table of contents at the beginning of each section. The handbook is 3-ring binder ready, published as a package with full-color slip cover and spine and 3-hole drilled body. Binder not included. Revision and Availability This handbook is updated annually. Individual sections are revised once each year; revision dates are listed at the start of each section.
Some sections may include additional online content, such as photos and links to related websites, publications, and other resources. Please send comments or suggestions to handbook editor Ed Peachey ed. This handbook is not intended as a complete guide to weed control or herbicide use. Authors have assembled the most reliable information available to them at the time of publication. Due to constantly changing laws and regulations, authors can assume no liability for the recommendations.
Any use of a pesticide contrary to instructions on the printed label is illegal and is not recommended. In Bellevue in , beetles were found on March 25th when host lilies were barely two inches out of the ground. The beetles may also hide underneath the leaves. If there are several lily plants of high value and early damage is severe, pesticides may be necessary. The best time for control is when larvae are small and vulnerable. Be sure to check less favored, but acceptable, hosts such other lily relatives, nightshade, nicotiana or potato.
Minimize planting lilies in contiguous plantings. Mixed plantings make it more difficult for beetles to find new host plants. Asiatic hybrid varieties of lilies are most susceptible. There are no parasitoids for this insect that are native to North America. Several parasitoids of the red lily leaf beetle from Europe have been imported and released in the east coast states with some success.
Murray, T. LaGasa and J.
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