Review (Two Columns)

Publications 10 November 2016

WH(Y)ITE FLY

A number of natural enemies attack whiteflies including parasitic wasps, predatory beetles and mites, and fungi. Some of them have been used successfully in biological control. An example for South Africa is the control of the spiny blackfly (Aleurocanthus spiniferus) on citrus by a tiny species of parasitic wasp.

Biological solutions by employing White fly natural enemies are not always successful “Because natural enemies need a continual supply of food, they will never completely eliminate whitefly populations. Rather they are used to suppress pest populations to a level that is tolerable, i.e. there is no significant impact on the crop.(Horticulture New Zealand, Peter E. Smith, 2009).

Publications 10 November 2016

SUCCESSFUL SEEDLING PRODUCTION

Perfecting the growing medium for successful seedling production and propogation of cuttings.

Growing medium is rated by users according to certain parameters:

a) Cost  

b) Specific crop requirements

Technically speaking, each of the identified growing mediums can in general, support seedling development. The difference is; on what scale, in what climatic conditions and, which type of plant. The intelligent way to approach it is to first understand the plant; its requirements, behaviour and its nature. Then to carefully analyse whether the investment in growing medium (minimal as it might be) really supports the specific plant and will ultimately produce a better seedling.

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