House Flies. (Musca Domestica Et Al.) PDF Download
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Author: Leland Ossian Howard
Publisher:
ISBN:
Category : Housefly
Languages : en
Pages : 18
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Book Description
Author: Leland Ossian Howard
Publisher:
ISBN:
Category : Housefly
Languages : en
Pages : 24
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Book Description
Author: Leland Ossian Howard
Publisher:
ISBN:
Category : Housefly
Languages : en
Pages : 18
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Book Description
Author: Leland Ossian Howard
Publisher:
ISBN:
Category : Agricultural exhibitions
Languages : en
Pages : 28
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Book Description
"Methods of irrigating grain crops are restricted somewhat because of the fact that such crops cover the entire surface of the plot on which they are grown. Objections to the flooding method, based on loss of water by evaporation, have less weight the irrigation of grain than of other crops, grain fields seldom being irrigated after the seed is planted until the grain is high enough to protect the soil from sun and wind. Grain usually is the first crop grown on irrigated farms. For such farms flooding usually is better than other methods, since the preparation of the land for it is easier than for the other methods. Flooding from field ditches is the usual method of handling water in irrigating grain, but the border basin methods are also adapted to such crops. These methods are described in detail in this bulletin, which also discusses the proper time to irrigate, the quantity of water required, and the cost of growing grain under irrigation."--Page [2]
Author: Leland Ossian Howard
Publisher:
ISBN:
Category : Flies
Languages : en
Pages : 374
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Book Description
Author: George E. Cantwell
Publisher:
ISBN:
Category : Housefly
Languages : en
Pages : 80
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Book Description
Author: Charles Gordon Hewitt
Publisher: Cambridge : University Press
ISBN:
Category : Animal behavior
Languages : en
Pages : 412
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Book Description
Author: Edward Hatch (Jr.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: Ernest Edward Austen
Publisher:
ISBN:
Category : Diptera
Languages : en
Pages : 64
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Book Description
Author: Frederick William Fitzsimons
Publisher:
ISBN:
Category : Diptera
Languages : en
Pages : 104
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Book Description
Author: R.P. Lane
Publisher: Springer Science & Business Media
ISBN: 9401115540
Category : Science
Languages : en
Pages : 733
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Book Description
Surprising though it seems, the world faces almost as great a threat today from arthropod-borne diseases as it did in the heady days of the 1950s when global eradication of such diseases by eliminating their vectors with synthetic insecticides, particularly DDT, seemed a real possibility. Malaria, for example, still causes tremendous morbidity and mortality throughout the world, especially in Africa. Knowledge of the biology of insect and arachnid disease vectors is arguably more important now than it has ever been. Biological research directed at the development of better methods of control becomes even more important in the light of the partial failure of many control schemes that are based on insecticide- although not all is gloom, since basic biological studies have contributed enormously to the outstanding success of international control programmes such as the vast Onchocerciasis Control Programme in West Africa. It is a sine qua non for proper understanding of the epidemiology and successful vector control of any human disease transmitted by an arthropod that all concerned with the problem - medical entomologist, parasitologist, field technician - have a good basic understanding of the arthropod's biology. Knowledge will be needed not only of its direct relationship to any parasite or pathogen that it transmits but also of its structure, its life history and its behaviour - in short, its natural history. Above all, it will be necessary to be sure that it is correctly identified.
