3 edition of alfalfa weevil found in the catalog.
W. O. Ellis
|Series||Popular bulletin / Washington Agricultural Experiment Station -- no. 70., Popular bulletin (Washington Agricultural Experiment Station) -- no. 70.|
|The Physical Object|
|Pagination|| p. :|
to insect pests, including the spotted alfalfa aphid and pea aphid, has been incorporated into some vari - eties, and they are recommended. Varietal resistance to the alfalfa weevil has not been achieved; however, a few varieties are tolerant to low levels of weevil infestations. Increased insect resistance will likelyFile Size: KB. Additional Physical Format: Print version: Essig, E.O. (Edward Oliver), Alfalfa weevil. Berkeley, Calif.: Agricultural Experiment Station,
Sampling an alfalfa field to determine the extent of alfalfa weevil damage and average stage of weevil development is best accomplished by walking through the field in an "M-shaped pattern." Ten. The material and content contained in the Greenbook label database is for general use information only. Agworld and Greenbook do not provide any guarantee or assurance that the in.
Alfalfa Weevil Control The best alfalfa weevil management decisions are based on stem sampling. If this information is not available then control is recommended when 25% to 50% of the tips are being fed upon and 2 or more larvae can be found per stem. Alfalfa Weevil Insecticides Rate per Acre Harvest or Graze (days)File Size: 72KB. These include the alfalfa weevil, clover leaf weevil, blister beetles, several aphids, potato leaf hoppers and the alfalfa plant bug. Depending upon severity of infestation, chemical control of insects may be necessary to maintain a healthy, productive stand. He is Co-editor and Co-author of the Quality Food Plots book published by QDMA.
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For more detailed information please see KSRE publication MF Alfalfa Weevil. Alfalfa weevil adult. Alfalfa weevil larva. Alfalfa weevil larval defoliation. Identification. The adult weevil is 3/inch long and light brown with a dark mid-dorsal line extending down the middle of the back.
About the Alfalfa Weevil. Reproduction and Life Cycle. The alfalfa weevil overwinters as an adult in leaf debris and soil where alfalfa is grown. They will surface early in the spring, usually once temperatures are 60 degrees Fahrenheit or higher and will.
The alfalfa weevil is an important pest of established alfalfa stands in New York. New seedings are not typically affected. The alfalfa weevil overwinters primarily as an adult in New York. These adults return to alfalfa fields in the spring when temperatures permit and begin to feed and lay eggs in the stems of developing alfalfa plants.
In an. Alfalfa Weevil Economic Thresholds Economic thresholds have been developed to aid decision making on alfalfa weevil control. Since we haven't had any reports of alfalfa weevil in Nebraska, and alfalfa first cutting is approaching, we present thresholds and recommendations for 50% alfalfa weevil book and later in Table thresholds were derived by North Dakota State University.
The alfalfa weevil larvae spend nearly all their time on the plant. They curl into a C-shape when disturbed. Once the alfalfa is high enough to use a sweep net, take a sample to establish whether weevils are present. If they are, randomly select at least five sampling sites from across the entire field.
At each site, gently pick or cut at least. Alfalfa Weevil. Hypera postica Gyllenhal. The alfalfa weevil is one of the primary insect defoliators of alfalfa. Thought to be of Asian origin, the alfalfa weevil was introduced into the United States from southern Europe. First discovered in in Utah, it is now present in all 48 mainland states.
4 Alfalfa Management Guide Surviving plants will be stunted and continue to yield less in subsequent years (Figure 2). A waiting period after destroying the old stand is necessary to. An alfalfa weevil-specific fungus occurs in many alfalfa-growing regions in California that aids in biological control.
In fields with sustained moisture, this soil-dwelling fungus (Zoophthora phytonomi) sporulates and infects the larval stage, causing. Alfalfa weevil is an important defoliating pest in alfalfa. Heavy infestations can reduce tonnage and forage quality.
Adults feed on plants, but typically the larvae cause the majority of plant injury. Female alfalfa weevils can layeggs in a lifetime and insert at a time into alfalfa stems.
Alfalfa weevil definition is - a small dark brown European weevil (Hypera postica) that is now a widespread pest of alfalfa in North America. Alfalfa weevil can cause major damage to alfalfa production during the early cuttings of the growing season. Adult weevils lay their eggs inside the alfalfa stems in the late fall or early spring.
The hatched larvae then feed on the terminals and upper leaves of the alfalfa plant in the early spring where most of their damage is seen before the. For alfalfa growers throughout the United States—and particularly in the western states—the alfalfa weevil (Hypera postica) is a major concern, as damage from infestations lead to decreased yield and quality.A new resource published today in the open-access Journal of Integrated Pest Management offers growers a robust profile of alfalfa weevil and various.
Alfalfa is a major forage crop in the U.S., and the organic component has been growing to supply organic milk producers. A number of insect pests attack this crop, but the alfalfa weevil is probably the most familiar to growers. Alfalfa weevil is one of the two most-damaging insect pests of alfalfa in Pennsylvania (the other is potato leafhopper).
It is an exotic species that likely evolved in Asia, but appears to have been introduced to the U.S. at least three times. Alfalfa weevil, (Hypera postica), insect pest of the family Curculionidae (order Coleoptera) whose larvae damage crops, most often alfalfa and originally from Asia, the alfalfa weevil was introduced from Europe into the United States in the early 20th century and is now present in all 48 mainland states.
carbaryl (numerous products) at 1 to lb ai/a. PHI 7 days for grazing or cutting. REI 12 hr. If pretreatment damage is extensive, cut alfalfa and treat the stubble for alfalfa weevil larvae.
This product is not effective against adult alfalfa weevils. Do not apply more than once per cutting. Mature weevil larvae are 5 to 6 mm long and light green, with a distinctive white band along the middle of the back. Figure 1. Alfalfa weevil adult (left) and larva (right) with feeding damage (photos by Patricia Monk).
Once a field becomes infested with alfalfa weevil, some damage usually occurs every year. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.
Alfalfa (/ æ l ˈ f æ l f ə /), also called lucerne and called Medicago sativa in binomial nomenclature, is a perennial flowering plant in the legume family is cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover name alfalfa is used in North : Fabaceae.
Alfalfa growers can visit the K-State Research and Extension Bookstore online or their local extension office for more information on the alfalfa weevil, K-State Research and Extension is a short name for the Kansas State University Agricultural Experiment Station and Cooperative Extension Service, a program designed to generate and.
"The alfalfa weevil destroys a great deal of alfalfa in northern Utah and southern Idaho. It also inhabits southwestern Wyoming and is spreading slowly to new territory in all directions.
It may in time infest most of the United States. The adult, a small brown snout-beetle, and the larva, a green, worm-like creature, usually escape notice during the first two or three Cited by: 2.The alfalfa weevil has been a major insect pest of alfalfa in Virginia since the 's.
For decades, it was virtually impossible to grow alfalfa profitably without spraying insecticides to control the weevil. As a result, the practice of applying a springtime insecticide to alfalfa has become routine for many Virginia growers.Common Name: Alfalfa weevil Scientific Name: Varies Order: Coleoptera Description: Adult beetle is a brown weevil, about to inches long, with a downward projecting beak and a wide darker stripe down the middle of the back.
The color may vary from almost uniform brown to nearly black. Larvae are legless, plump-bodied and yellowish when young turning to pale .