Evaluation of Methods of Chemical Control of the Cereal Leaf Beetle (Oulema Melanopus, L.) with Respect to an Integrated Plan PDF Download
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Author: Marcus Tully Wells
Publisher:
ISBN:
Category : Insecticides
Languages : en
Pages : 138
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Author: Marcus Tully Wells
Publisher:
ISBN:
Category : Insecticides
Languages : en
Pages : 138
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Author: Diana Roberts
Publisher:
ISBN:
Category : Oulema melanopa
Languages : en
Pages : 12
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Book Description
"This bulletin describes how to identify the cereal leaf beetle (Oulema melanopus) and discusses its biology. Scouting techniques and economic thresholds are outlined, along with cultural management methods and optimal times to apply insecticide, if needed. It also discusses the most effective method of control -- biocontrol using wasps that only parasitize and kill the cereal leaf beetle. Growers may encourage these free biocontrol agents to multiply in their fields by maintaining a simple insectary. Worksheets and a decision chart are included to help integrate all the decision processes."--Abstract.
Author: S. H. Gage
Publisher:
ISBN:
Category : Oulema melanopa
Languages : en
Pages : 398
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Author: United States. Plant Pest Control Division
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 4
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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 28
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Author: United States. Plant Protection Division
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 4
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Author: Richard Alfred Casagrande
Publisher:
ISBN:
Category : Oulema melanopa
Languages : en
Pages : 388
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Author: Swaroop V. Kher
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 304
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Book Description
The cereal leaf beetle, Oulema melanopus (L.) (Coleoptera: Chrysomelidae) is a new invasive insect pest of cereals in western Canada, and has expanded its geographic range significantly throughout the region. Its establishment has economic implications for grain production, trade and export. Biological control with its principal larval parasitoid, Tetrastichus julis (Walker) (Hymenoptera: Eulophidae), introduced from Europe has been the most successful management strategy in North America. In southern Alberta, the parasitoid has established naturally along with the beetle and provides an opportunity for integration of biological control with other management tactics. My investigation focused on tritrophic interactions between the cereal host plants, O. melanopus and T. julis. I investigated life histories and host preferences of O. melanopus and T. julis, their spatio-temporal distribution dynamics, and explored host-plant resistance mechanisms in exotic wheat genotypes to discern interrelations between these species. My studies on developmental patterns of O. melanopus on potential cereal hosts in western Canada (oat, wheat, barley, corn, rye and triticale) indicated that the preferences for these hosts and their utilization differed within the fundamental host range of O. melanopus. Prolonged developmental times and low survivorship on a local cultivar of oat, Waldern, indicated a potential avenue for designing strategies such as trap cropping. My studies on the biology of T. julis indicated that T. julis females prefer advanced larval instars for parasitization; such a selection lead to higher clutch size, and improved fitness. Under field conditions, the relationship of O. melanopus and T. julis indicated a tightly coupled host-natural enemy system. Tetrastichus julis exhibited strong density dependence. Host plant characteristics influenced field dynamics of O. melanopus which in turn influenced T. julis distribution. Three of the six central Asian wheat genotypes tested (NN-100, NN-78 and NN-27) were less attractive for O. melanopus oviposition and feeding and further trials on biology and fitness of the beetle suggested prolonged development and low fitness on these genotypes. This indicated presence of both antixenosis and antibiosis mechanisms. The resistant lines identified can act as effective genotypes for breeding explorations in North America.
Author: S. H. Gage
Publisher:
ISBN:
Category : Oulema melanopa
Languages : en
Pages : 248
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Author: Alan J. Sawyer
Publisher:
ISBN:
Category : Field crops
Languages : en
Pages : 622
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