Browsing by Author "Gardner, J.C.M."
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Item An Annotated List of East African Forest Insects(East African Agriculture and Forestry Research Organization, 1950) Gardner, J.C.M.; East African Agriculture and Forestry Research Organization; East African Agriculture and Forestry Research OrganizationThis list is based on a survey of forest insects started in 1950 when the writer commenced work; the survey will of course be continuous and will become more quantitative in the course of time. J. O. Evans and S. J. Curry, Forest Department, Kenya (from 1953) did much collecting and the Forest Departments of Uganda and Tanganyika each deputed two African collectors to assist.Item Forest Entomology(1960) Gardner, J.C.M.; East African Agriculture and Forestry Research OrganizationControl measures fall into two categories, destruction of the termites and protection of the trees by repellent barriers. Direct attack on many small underground nesting species is at present impracticable, but baiting methods are under consideration. Where the nest can be located various poisoning techniques are being tried out. Protection of young trees by mixing insecticides in the planting holes is an orthodox approach, but has the disadvantage of requiring careful application, and the effect is limited to the life of the insecticide and to its bounds of distribution. This method has been tried in several African countries. In Tanganyika, M. S. Parry has met with some success, and, in Uganda, K. W. Brown is co-operating in the present investigation. A method is sought which is effective, economically possible, and relatively foolproof in application. Two sites with different climatic conditions have been chosen initially, and trial plots of termite-susceptible Eucalyptus saligna and E. paniculata planted, under the protection of a short" list of insecticides. In the next trials the amount of selected insecticides will be varied to find the effective minimum. Application of protective formulae is then envisaged on a larger scale under normal planting conditions at many sites throughout East Africa.Item Insects Injurious to Timber in East Africa(1957) Gardner, J.C.M.; East African Agricultural and Forestry Research OrganizationThese notes are based on a relatively small part of a general survey of forest insects in East Africa started in 1950. Much of our information derives from inquiries from timber firms, architects, private individuals and forest officers. While the conditions conducive to attack and the general principles of prevention of attack are outlined, information on such technical matters as wood impregnation is not attempted: for this the Utilization Officers (of the Kenya and Tanganyika Forest Departments respectively) or the Forest Engineer (Uganda) should be consulted.Item Notes On Oemida Cahani Distant (Cerambycidae)(1953) Gardner, J.C.M.; Evans, J.O.Oemida gahani is a beetle which, in its larval stage, can cause serious. damage not only to seasoned wood but also to certain species of trees in plantations. The investigations on which this account is based have been of comparatively short duration and have been hampered by shortage of staff, but it seems advisable now to summarize what information we have so that future workers, including those forest officers in charge of affected areas, may appreciate the situation. At the same time gaps will become apparent 'in 'our knowledge of this' project which' should be regarded as a term one. Although damage has so far been recorded only from Kenya it may well be expected in Tanganyika and Uganda.Item Notes on oemida gahani Distant (Cerambycidje) Part II(1957) Evans, J.O.; Gardner, J.C.M.; Kenya Forest DepartmentThis second interim report on Oemida gahani should be read in conjunction with the first (Gardner, Evans, and Pudden, 1953, E. Afr. agric. J. 18, 176-183). Our plans from October 1953, were seriously interfered with by Emergency conditions causing restriction of movement in the forests and a shortage of labour. Evans, responsible for nearly all the field work now referred to, was called upon to give a considerable proportion of his time to police duties; he was assisted by one African forest ranger.Item Notes on Oemida Gahani Distant (Cerambycidje) Part II(1956/1957) Gardner, J.C.M.; Evans, J.O.This second interim report on Oem ida gahani should be read in conjunction with the first (Gardner, Evans and Pudden, 1953, E. Afr. agric. J. 18, 176-183).
