Download or read book Seasonal Changes in Distribution of the African Armyworm Spodoptera Exempta Wlk Lep Noctuidae with Special Reference to Eastern Africa written by Eric Septimus Brown and published by . This book was released on 1969 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Frequency of Attack and Seasonal Incidence of the African Armyworm Spodoptera Exempta Walk Lep Noctuidae with Particular Reference to Africa and Southwestern Arabia written by Margaret J. Haggis and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weather and the Epidemiology of the African Armyworm Spodoptera Exempta written by M. R. Tucker and published by Hyperion Books. This book was released on 1993 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes work carried out in the African armyworm seasons during 1972-88 in relation to frequency of outbreaks and weather conditions. The use of trajectory analysis in estimating the migration paths of windborne moths during the season is discussed together with the importance of rainstorms in concentrating the moths to cause an outbreak. Of interest to those working in the field of predictive techniques in migration research, and those planning control operations against this serious pest.
Download or read book Radar Entomology written by V. Alistair Drake and published by CABI. This book was released on 2012 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many of the world's most serious agricultural pests are highly migratory. Through the use of special-purpose radars we are provided with insights into their movement and how they learn about and navigate through their environment. This text examines the behaviour and regional variations of these species, as well as the altitude of migration, concentration of insects in layers and how they respond to large and small-scale wind systems. The book relates radar observation of insect movement to complementary and competing methodologies and surveys its capabilities and limitations. It also deals wi
Download or read book East African Agricultural Journal of Kenya Tanganyika Uganda and Zanzibar written by and published by . This book was released on 1974 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior Modifying Chemicals for Insect Management written by Ridgway and published by CRC Press. This book was released on 1990-03-12 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting an authoritative overview of current findings on pheromone applications, this reference reviews the principles involved in employing these compounds, their chemistry, and delivery systems for efficient use. In addition, it provides case studies of current and potential practical applicati
Download or read book Comparative Ecology written by Y. Itô and published by Cambridge University Press. This book was released on 1981-03-12 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1980 book considers the patterns of population fluctuations of animals and intraspecific social relations by means of comparative methods and discusses the evolution of population regulation mechanisms and social relations. The author proposes that parental care has evolved in environments in which it is difficult for the young to obtain food, whilst high fecundity has evolved in the opposite environment. He presents evidence from a wide range of organisms to argue that during evolution animals repeatedly face the 'choice' of two strategies - low fecundity combined with parental protection, or high fecundity - and that this choice determined the amplitude, regularity and associated main factors of population fluctuations as well as the main characteristics of social relations as expressed in group life or dispersed living involving territory. Although many examples are drawn from insects, with which the author is most familiar, mammal, birds and other animal groups are also examined in depth.
Download or read book East African Agricultural and Forestry Journal written by and published by . This book was released on 1978 with total page 740 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 2012-12-06 with total page 547 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 Agricultural Insect Pests of the Tropics and their Control written by Dennis S. Hill and published by Cambridge University Press. This book was released on 1987-10-22 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Entomologist s Monthly Magazine written by and published by . This book was released on 1973 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insect Flight written by Wijesiri Danthanarayana and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Israel Journal of Entomology written by and published by . This book was released on 1969 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pest Management In Transition written by Pieter De Jong and published by CRC Press. This book was released on 2019-06-10 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume examines current pest control strategies, introduces new alternatives for pest control in the interior West, and documents successful integrated pest management programs from across the nation. The contributors include leaders in alternative pest control research, representatives of regional and federal agencies, grower organizations, i
Download or read book Contributions in Marine Science written by University of Texas Marine Science Institute and published by . This book was released on 1985 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration written by Mary Ann Richmond Rankin and published by . This book was released on 1985 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium held 30 October to 2 November 1983 at the University of Texas Marine Science Institute at Port Aransas, Tex., as a part of the centennial celebration of the University of Texas.--Pref.
Download or read book Physiology and Ecology Japan written by and published by . This book was released on 1982 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
