By Peter G. Fenemore (Auth.)
Read or Download Plant Pests and their Control PDF
Similar entomology books
An entire realizing of the biology and lifestyles histories of pest species is essential for all these inquisitive about crop construction and crop safety. this crucial new identify presents complete insurance of significant insect and mite pest species, essentially in Northern Europe. Textbook of Agricultural Entomology is greatly divided into elements.
With as much as 1 / 4 of all insect species heading in the direction of extinction over the following few a long time, there's now a urgent have to summarize the strategies on hand for measuring insect variety so as to advance powerful conservation concepts. Insect Conservation outlines the most tools and methods to be had to entomologists, offering a complete synthesis to be used by way of graduate scholars, researchers and practicing conservationists world wide.
I spent 4 months in New Caledonia in 1971 with the article of creating a quantitative survey of the night-flying macrolepidoptera with light-traps and an review of the Rhopalocera and microlepidoptera. This fieldwork used to be financed by way of a central authority Grant-in-Aid for medical Investigations adminis tered via the Royal Society, and by way of a furnish from the Godman Fund.
- A Fly for the Prosecution: How Insect Evidence Helps Solve Crimes
- Behavioural Ecology of Insect Parasitoids: From theoretical approaches to field applications
- Ants of Florida: identification and natural history
- Insect Species Conservation
Extra resources for Plant Pests and their Control
382 pp. Richards, O. ; Davies, R. G. 1977. Imms general textbook of entomology. 10th edition. Vol. I. Structure, physiology and development. Chapman and Hall, London. 418 pp. Ross, H. ; Ross,C. ; and Ross, J. R. P. 1982. A textbook of entomology. 4th edition. John Wiley and Sons, New York. 666 pp. Snodgrass, R. E. 1935. Principles of insect morphology. McGraw Hill, New York, 667 pp. Chapter 6 Insect Identification and Classification* Insect identification and classification are two closely related but not identical topics.
Most insects in temperate climates therefore pass the winter (overwinter) in a Reproduction and Life Cycles 53 dormant or semi-dormant state. This can be any stage in the life cycle but is commonly the egg or pupal stage as these do not require food and can remain in an inactive condition for long periods. During the winter many insects enter a specialised condition of suspended activity called diapause. This is often initiated before the onset of severe adverse conditions by some environmental trigger (such as decreasing daylength) so that by the time winter strikes the insect is already dormant.
At the opposite extreme, the life cycle of aphids may take less than a week under summer conditions so that build up of numbers can be very rapid. Many important crop pests have short life cycles and the associated ability to multiply rapidly. Overwintering Moist tropical climates are favourable for insect development all the year round and reproduction is therefore usually continuous with generation succeeding generation indefinitely. Besides providing suitable environmental conditions, the tropics also ensure an adequate food supply at ail times of the year, except where severe dry seasons occur.