Author: George Davis Hoffman
Publisher:
ISBN:
Category :
Languages : en
Pages : 410
Book Description
Population Dynamics of the Potato Leafhopper, Empoasca Fabae, on Water-stressed Alfalfa
Author: George Davis Hoffman
Publisher:
ISBN:
Category :
Languages : en
Pages : 410
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 410
Book Description
Effects of Potato Leafhopper, Empoasca Fabae, and Water Stress on Alfalfa Forage Yield and Quality
Author: Jianzhong Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 220
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 220
Book Description
Environmental Influences on Changes of Populations of the Potato Leafhopper, Empoasca Fabae, in Relation to Alfalfa
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Environmental Influences on Changes of Populations of the Potato Leafhopper, Empoasca Fabae, in Relation to Alfalfa
Author: Zenas Barnard Noon
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 326
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 326
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
Enhancing Biotic Mortality of the Potato Leafhopper, Empoasca Fabae
Author: Laura Anne Weiser
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
Book Description
This dissertation quantified the population dynamics of E. fabae and developed a new management technique for this alfalfa pest. A two-year study monitored the number of E. fabae at 3 locations within alfalfa fields from mid-April to June and from adjacent tree/shrub species until July. Similar numbers of E. fabae were present on all tree and shrub species. There were more E. fabae at the edges of the fields closest to the trees than at 40 m into the field during the 1st week of May. In subsequent samples, there was no difference in the distribution of E. fabae in the alfalfa field. Based on this study, E. fabae are not using adjacent trees to build up population numbers to infest nearby alfalfa fields in early spring. The effects of a 3 m uncut strip at first harvest on the distribution of E. fabae and predatory species in alfalfa were examined from 1998 to 2000. Higher numbers of E. fabae were observed in the uncut strips than in the regrowth for 2-3 weeks after harvest in 2 of 3 years. The number of insect predators within the uncut strip was higher during the second week after harvest. This research provides alfalfa growers a potential cultural management technique for E. fabae while retaining beneficial insects. Predation rates of E. fabae by four predatory species were examined in a greenhouse study. Adult Coleomegilla maculata and Orius insidiosus consumed more E. fabae nymphs than adults. In contrast, similar numbers of adult and nymphal E. fabae were consumed by Nabis roseipennis and Chrysoperla carnea. Adults and nymphs of E. fabae and adults of predatory species were sampled in Iowa alfalfa fields from June-September in 1999 and 2000. Partial life tables were constructed for E. fabae nymphs. For the 1st growing period, E. fabae nymphal mortality was 70% and 49% in 1999 and 2000, respectively. During the last growing period, total nymphal mortality was relatively low (
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
Book Description
This dissertation quantified the population dynamics of E. fabae and developed a new management technique for this alfalfa pest. A two-year study monitored the number of E. fabae at 3 locations within alfalfa fields from mid-April to June and from adjacent tree/shrub species until July. Similar numbers of E. fabae were present on all tree and shrub species. There were more E. fabae at the edges of the fields closest to the trees than at 40 m into the field during the 1st week of May. In subsequent samples, there was no difference in the distribution of E. fabae in the alfalfa field. Based on this study, E. fabae are not using adjacent trees to build up population numbers to infest nearby alfalfa fields in early spring. The effects of a 3 m uncut strip at first harvest on the distribution of E. fabae and predatory species in alfalfa were examined from 1998 to 2000. Higher numbers of E. fabae were observed in the uncut strips than in the regrowth for 2-3 weeks after harvest in 2 of 3 years. The number of insect predators within the uncut strip was higher during the second week after harvest. This research provides alfalfa growers a potential cultural management technique for E. fabae while retaining beneficial insects. Predation rates of E. fabae by four predatory species were examined in a greenhouse study. Adult Coleomegilla maculata and Orius insidiosus consumed more E. fabae nymphs than adults. In contrast, similar numbers of adult and nymphal E. fabae were consumed by Nabis roseipennis and Chrysoperla carnea. Adults and nymphs of E. fabae and adults of predatory species were sampled in Iowa alfalfa fields from June-September in 1999 and 2000. Partial life tables were constructed for E. fabae nymphs. For the 1st growing period, E. fabae nymphal mortality was 70% and 49% in 1999 and 2000, respectively. During the last growing period, total nymphal mortality was relatively low (
Behavior and Field Dynamics of the Potato Leafhopper (Empoasca Fabae (Harris))
Author: William James Roltsch
Publisher:
ISBN:
Category : Beans
Languages : en
Pages : 354
Book Description
Publisher:
ISBN:
Category : Beans
Languages : en
Pages : 354
Book Description
Potato Leafhopper (Empoasca Fabae) and Alfalfa Weevil (Hypera Postica) Density and Damage in Binary Mixtures of Alfalfa and Forage Grasses
Author: Margi L. Coggins
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 240
Book Description
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 240
Book Description