Proceedings of the South & East African combined agricultural, cotton, entomological and mycological conference held at Nairobi, August, 1926

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Monograph

Identifikator:: 1738588467

URN:: urn:nbn:de:zbw-retromon-115043

Document type:: Monograph

Title:: Proceedings of the South & East African combined agricultural, cotton, entomological and mycological conference held at Nairobi, August, 1926

Place of publication:: Nairobi

Publisher:: East African Standard

Year of publication:: 1926

Scope:: VI, 337 Seiten; Ill.

Digitisation:: 2020

Collection:: Economics Books

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Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: Part IV. Etomology & Mycology

Collection:: Economics Books

164 PART IV. "Mr. SIMPSON explained the construction of the ginneries in Uganda, and the regulations in force there for ginning cotton. Mr. KIRBY said that the question of ginnery control could be viewed from two different aspects: — (a) The control of pests. (b) The mixing of seed. In regard to the first, adequate legislation was in force in Tanganyika; and in regard to the second, no special measures were necessary at present where only one variety was grown. This latter aspect of the question would arise only where special varieties or qualities of cotton seed are to be distributed. Mr. KOCH stated that no need for the control of ginneries had yet arisen in the Union, and that it had not received any consideration as the ginnery buildings were, for the most part, of excellent construction and type. CHAPTER III * COFFEE. (Mr. Trench attended for the discussions om matters connected with coffee.) BIOLOGICAL CONTROL OF INSECT PESTS, WITH PARTICULAR REFERENCE TO THE CONTROL OF THE COMMON COFFEE MEALY BUG IN KENYA COLONY. Mr. KIRKPATRICK read the following paper (referred to in the Agenda as T.C.(C)E. & M.2):— The factors affecting the numerical abundance of insects in nature are as follows: (a) Climate. (b) Food Supply. (¢) Parasites. (d) Predatory Enemies. In a fairly recent Text Book of Entomology it is stated that these factors are almost wholly beyond man’s control, and reliance for the suppression of pests is placed mainly on purely artificial means of destruction or prevention, and agricultural methods such as rotation of crops and other practices of husbandry (7, p. 374)t With this statement I venture to disagree entirely. While not minimising the value of insecticides and such like means of combating pests, and still less of agricultural methods calculated to modify their activities, it is in the control of climate and food supply, and in the intelligent utilisation of the enemies of destructive insects, that the cheapest, the most efficient. and the most permanent control is to be obtained. There are doubtless many insect pests which will possibly always be best controlled by purely artificial means, while in probably every instance of an insect suddenly assuming the proportions of a pest, is it necessary to use known and tried methods. such as spraying, * For other papers on Coffee see Part 1I., Chapter IV. bt See list of references on page 194. 2.

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