Download or read book Some Factors Influencing Populations of the European Corn Borer Ostrinia Nubilalis Hubner in the North Central States written by Alton N. Sparks and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cooperative Economic Insect Report written by and published by . This book was released on 1974 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Several Factors Influencing European Corn Borer Populations in North Dakota written by R. D. Frye and published by . This book was released on 1972 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cooperative Economic Insect Report written by United States. Plant Pest Control Division and published by . This book was released on 1974 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Bulletin written by Iowa Agriculture and Home Economics Experiment Station and published by . This book was released on 1967 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book European Corn Borer written by Richard Dean Frye and published by . This book was released on 1971 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Bulletin written by and published by . This book was released on 1967 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book European Corn Borer written by Armand Bauer and published by . This book was released on 1969 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book North Central Regional Research Publication written by and published by . This book was released on 1942 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Iowa State Journal of Research written by Iowa. State College, Cedar Falls and published by . This book was released on 1974 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Iowa State Journal of Research written by and published by . This book was released on 1974 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Maiz written by Elisa Ramírez Castañeda and published by IICA Biblioteca Venezuela. This book was released on 2001 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecological Methods written by T.R. Southwood and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: The virtual impossibility of extracting the many different species from a habitat with equal efficiency by a single method (e.g. Nef, 1960). 1.1 Population estimates Population estimates can be classified into a number of different types; the most convenient classification is that adopted by Morris (1955), although he used the terms somewhat differently in a later paper (1960). 1.1.1 Absolute and related estimates The animal numbers may be expressed as a density per unit area of the ground of the habitat. Such estimates are given by nearest neighbour and related techniques (Chapter 2), marking and recapture (Chapter 3), by sampling a known fraction of the habitat (Chapter 4-6) and by removal sampling and random walk techniques (Chapter 7). Absolute population The number of animals per unit area (e.g. hectare, acre). It is almost impossible to construct a budget or to study mortality factors without the conversion of population estimates to absolute figures, for not only do insects often move from the plant to the soil at different developmental stages, but the amount of plant material is itself always changing. The importance of obtaining absolute estimates cannot be overemphasized.

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Basic Principles of Insect Population Suppression and Management written by E. F. Knipling and published by . This book was released on 1979 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book North Dakota Research Report written by and published by . This book was released on 1966 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pesticides Documentation Bulletin written by and published by . This book was released on 1965-11 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: