Author: Stephen Alan Lefko
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
Book Description
In 1997 several seed companies released alfalfa products that were marketed as resistant to the potato leafhopper, (Empoasca fabae Harris), the key pest of this crop in the Midwest and northeastern United States. The objectives of this research were to investigate the mechanism of insect resistance in leafhopper-resistant alfalfa and to determine if potato leafhopper-resistant alfalfa would require updated pest-management guidelines. It was determined that an antixenotic mechanism functioned at a plant or stem level, and without a choice, leafhoppers could feed as much on resistant alfalfa compared with susceptible alfalfa. Antixenosis was largely a function of insect behavior. The antixenotic mechanism detected in lab studies was not detected at the field-plot scale. The densities of potato leafhopper adults and nymphs were similar among plots of one susceptible alfalfa and four leafhopper-resistant alfalfa during three years of sampling.
Inheritance of Resistance to the Potato Leafhopper in Alfalfa
Author: Norman Linn Taylor
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 310
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 310
Book Description
Alfalfa Resistance to the Potato Leafhopper
Author: Stephen Alan Lefko
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
Book Description
In 1997 several seed companies released alfalfa products that were marketed as resistant to the potato leafhopper, (Empoasca fabae Harris), the key pest of this crop in the Midwest and northeastern United States. The objectives of this research were to investigate the mechanism of insect resistance in leafhopper-resistant alfalfa and to determine if potato leafhopper-resistant alfalfa would require updated pest-management guidelines. It was determined that an antixenotic mechanism functioned at a plant or stem level, and without a choice, leafhoppers could feed as much on resistant alfalfa compared with susceptible alfalfa. Antixenosis was largely a function of insect behavior. The antixenotic mechanism detected in lab studies was not detected at the field-plot scale. The densities of potato leafhopper adults and nymphs were similar among plots of one susceptible alfalfa and four leafhopper-resistant alfalfa during three years of sampling.
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
Book Description
In 1997 several seed companies released alfalfa products that were marketed as resistant to the potato leafhopper, (Empoasca fabae Harris), the key pest of this crop in the Midwest and northeastern United States. The objectives of this research were to investigate the mechanism of insect resistance in leafhopper-resistant alfalfa and to determine if potato leafhopper-resistant alfalfa would require updated pest-management guidelines. It was determined that an antixenotic mechanism functioned at a plant or stem level, and without a choice, leafhoppers could feed as much on resistant alfalfa compared with susceptible alfalfa. Antixenosis was largely a function of insect behavior. The antixenotic mechanism detected in lab studies was not detected at the field-plot scale. The densities of potato leafhopper adults and nymphs were similar among plots of one susceptible alfalfa and four leafhopper-resistant alfalfa during three years of sampling.
Mechanisms of Potato Leafhopper Resistance in Alfalfa
Author: Mitchell Erwin Roof
Publisher:
ISBN:
Category : Leafhoppers
Languages : en
Pages : 164
Book Description
Publisher:
ISBN:
Category : Leafhoppers
Languages : en
Pages : 164
Book Description
The Potato Leafhopper on Alfalfa
Author:
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 6
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 6
Book Description
The Potato Leafhopper
Author: F. W. Poos
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 4
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 4
Book Description
The Potato Leafhopper on Alfalfa
Author: United States. Entomology Research Division
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 6
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 6
Book Description
Genetic Analysis of Potato Leafhopper Resistance in Alfalfa
Author: John Franklin Soper
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Alfalfa Stem Anatomy of Populations Varying for Resistance to Potato Leafhopper
Author: Ana Micijevic
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 134
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 134
Book Description
Evaluation of Feeding Injury to Alfalfa by the Potato Leafhopper, Emopoasca Fabae (Harris).
Author: Glenn Delton Moore
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
Book Description
Potato Leafhopper Effects on Yield, Quality, and Persistence of Selected Alfalfa Cultivars
Author: Timothy S. Dietz
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 132
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 132
Book Description