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Balsam Woolly Aphid

Author: R. Ladd Livingston
Publisher:
ISBN:
Category : Adelgidae
Languages : en
Pages : 38

Book Description

Balsam Woolly Aphid

Author: R. Ladd Livingston
Publisher:
ISBN:
Category : Adelgidae
Languages : en
Pages : 38

Book Description

Balsam Woolly Aphid

Author: R. G. Mitchell
Publisher:
ISBN:
Category : Balsam woolly adelgid
Languages : en
Pages : 12

Book Description

The Balsam Woolly Aphid Problem in Oregon and Washington

Author: Norman E. Johnson
Publisher:
ISBN:
Category : Aphids
Languages : en
Pages : 46

Book Description

Field Keys to Predators of the Balsam Woolly Aphid in North Carolina

Author: Gene D. Amman
Publisher:
ISBN:
Category : Balsam woolly adelgid
Languages : en
Pages : 4

Book Description

Infestation Trends of Balsam Woolly Aphid in an Abies Alba Plantation in North Carolina

Author: Gene D. Amman
Publisher:
ISBN:
Category : Balsam woolly adelgid
Languages : en
Pages : 6

Book Description

The Balsam Woolly Aphid

Author: Robert Imre Gara
Publisher:
ISBN:
Category : Aphids
Languages : en
Pages : 82

Book Description

Balsam Fir

Author: Egolfs V. Bakuzis
Publisher: U of Minnesota Press
ISBN: 1452909466
Category : Fir
Languages : en
Pages : 468

Book Description

Dynamics of Forest Insect Populations

Author: Alan A. Berryman
Publisher: Springer Science & Business Media
ISBN: 1489907890
Category : Science
Languages : en
Pages : 608

Book Description
Insects multiply. Destruction reigns. There is dismay, followed by outcry, and demands to Authority. Authority remembers its experts or appoints some: they ought to know. The experts advise a Cure. The Cure can be almost anything: holy water from Mecca, a Government Commis sion, a culture of bacteria, poison, prayers denunciatory or tactful, a new god, a trap, a Pied Piper. The Cures have only one thing in common: with a little patience they always work. They have never been known entirely to fail. Likewise they have never been known to prevent the next outbreak. For the cycle of abundance and scarcity has a rhythm of its own, and the Cures are applied just when the plague of insects is going to abate through its own loss of momentum. -Abridged, with insects in place of voles, from C. Elton, 1924, Voles, Mice and Lemmings, with permission of Oxford University Press This book is an enquiry into the "natural rhythms" of insect abundance in forested ecosystems and into the forces that give rise to these rhythms. Forests form unique environ ments for such studies because one can find them growing under relatively natural (pri meval) conditions as well as under the domination of human actions. Also, the slow growth and turnover rates of forested ecosystems enable us to investigate insect popula tion dynamics in a plant environment that remains relatively constant or changes only slowly, this in contrast to agricultural systems, where change is often drastic and frequent.

A Resume of Prescribed Burnings on the Piedmont National Wildlife Refuge

Author: Eugene Czuhai
Publisher:
ISBN:
Category : Prescribed burning
Languages : en
Pages : 862

Book Description

Recent Publications of the Southeastern Forest Experiment Station

Author: Southeastern Forest Experiment Station (Asheville, N.C.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 48

Book Description