Author: John Valentine Schaffner Publisher: ISBN: Category : Agriculture Languages : en Pages : 166
Book Description
This publication is the result of studies begun in 1915 at the Melrose Highlands, Mass., laboratory of the Bureau of Entomology to determine the native hosts of the introduced parasites of the gypsy moth (Porthetria dispar L.) and the brown-tail moth (Nygmia phaeorrhoea Don.), and to determine the possible effect of these parasites on the native hosts.
Author: John Valentine Schaffner Publisher: ISBN: Category : Agriculture Languages : en Pages : 108
Book Description
This publication reports one phase of studies designed to acquire new knowledge on the distribution, food plants, life histories, and parasites of lepidopterous insects in Northeastern United States. This kind of knowledge is basic for all methods of controlling forest insect pests. The information contained in this report will be of particular value to entomologists and students interested in biological control.
Author: Paul Henri Arnaud Publisher: ISBN: Category : Agriculture Languages : en Pages : 868
Book Description
The Tachinidae are the most important of the dipterous families with entomophagous habits. Though often little noticed, these flies have an important role in controlling phytophagous Insecta.
Author: C. Wayne Martin Publisher: ISBN: Category : Browsing (Animal behavior) Languages : en Pages : 62
Book Description
Data from experimental sites in Breathitt County, Kentucky, and Raleigh County, West Virginia, showed that during a major rainstorm on 4 April 1977 streamflow from surface-mined watersheds peaked lower than that from adjacent or nearby unmined watersheds.
Author: John Valentine Schaffner
Author: John Valentine Schaffner
Author: Paul Henri Arnaud
Author: Ellen Kay Miller
Author: Harry Willis Allen
Author: Whiteford Lee Baker
Author: U.S. Office of Experiment Stations
Author: United States. Office of Experiment Stations
Author: Harry Willis Allen
Author: C. Wayne Martin