Insect Enemies of the Alfalfa Leafcutter Bee and Their Control PDF Download
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Author: Norman Dale Waters
Publisher:
ISBN:
Category : Alfalfa leafcutting bee
Languages : en
Pages : 8
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Book Description
Author: Norman Dale Waters
Publisher:
ISBN:
Category : Alfalfa leafcutting bee
Languages : en
Pages : 8
Get Book Here
Book Description
Author: Norman Dale Waters
Publisher:
ISBN:
Category : Alfalfa leafcutting bee
Languages : en
Pages : 8
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Book Description
Author: Carl A. Johansen
Publisher:
ISBN:
Category : Agricultural pests
Languages : en
Pages : 10
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Book Description
Author: Carl A. Johansen
Publisher:
ISBN:
Category : Agricultural pests
Languages : en
Pages : 6
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Book Description
Author: Carl A. Johansen
Publisher:
ISBN:
Category : Agricultural pests
Languages : en
Pages : 10
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Book Description
Author: Md. Jashim Uddin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The study was conducted from 1999 to 2001 to determine the most suitable method to be used for sampling insect pests on alfalfa, to determine the seasonal occurrence of common insect pests and natural enemies, to assess the roles of common natural enemies on insect pests, and to find out ways to increase the benefits from insect natural enemies in relation to the production practices of alfalfa in Manitoba. Among different sampling methods, sweep-net sampling was found to be the most consistent and reliable method of sampling most insect taxa, although beat tray sampling provided better estimates for Lygus spp. nymphs. It was found in the present study that Lygus spp. Hahn, Adelphocoris lineolatus (Goeze) and Acyrthosiphon pisum (Harris) were the most prevalent insect pests. Carabids, chrysopids, coccinellids, Nabis spp., Orius spp., spiders and opilionids were the most commonly occurring predaceous taxa. Circumstantial evidence from the field study and evidence from the laboratory study indicate that coccinellids play important roles in population growth of the above pests on alfalfa. Field and laborarory studies also provided evidence that carabids, coccinellids, chrysopids and nabids alone or together as a guild can suppress these pest populations on alfalfa. Parasitoids appeared to be important, as they killed a considerable percentage of Lygus spp. and A. pisum, but not of A. lineolatus. Aphidius ervi Haliday was the most prevalent aphid parasitoid. No control measures were required in hay fields, as swathing hay suppressed pest populations below damaging levels, partly through causing Lygus spp., and sometimes A. lineolatus, to move into adjacent seed fields. Conversely, insect pests were more numerous in seed fields, although these fields usually received chemical insecticides as pest control measures. Whether populations of natural enemies can be enhanced in seed alfalfa fields was examined, and it was found that nepetalactone, which is an aphid sex pheromone component, can be used to enhance natural enemy populations, and the benefits thereof, in seed fields. Successful rearing of Chrysoperla carnea (Stephens) and Chrysopa oculata Say larvae by using Megachile rotundata (Fabricius) (leafcutting bee) prepupae as the chrysopid larval diet expanded the use of leafcutting bees and provided a basis for inexpensive culture of chrysopids. The potential of insect pests and their natural enemies for management in connection with the current alfalfa production practices are discussed.
Author: Opender Koul
Publisher: CRC Press
ISBN: 0203302567
Category : Science
Languages : en
Pages : 204
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Book Description
Their natural enemies largely determine the population size and dynamic behavior of many plant-eating insects. Any reduction in enemy number can result in an insect outbreak. Applied biological control is thus one strategy for restoring functional biodiversity in many agroecosystems. Predators and Parasitoids addresses the role of natural enemies i
Author: Roland W. Portman
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 8
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Book Description
Author: Eric Mader
Publisher:
ISBN: 9781933395203
Category : Bee culture
Languages : en
Pages : 162
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Book Description
"Examines the history of the British fire service from 1800-1980, embracing certain key themes of modern British history: the impact of industrial change on urban development, the effect of disaster on political reform, the growth of the state, and the relationship between masculinity and trade unionism in creating a professional identity"--Provided by publisher.
Author: United States. Science and Education Administration
Publisher:
ISBN:
Category : Bee culture
Languages : en
Pages : 204
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Book Description
