GUAVA (Psidium guajava L)
Originating in South America, the guava has spread to most countries of the world having tropical and sub-tropical climates. The guava is a shrub or small tree which grows 2 to 8m tall. When cultivated it is usually pruned back to about 2 to 3 m. Trees that are not pruned, usually flower during October. When they are pruned, the period of full bloom is 10 to 12 weeks after pruning. Bees are the main pollinators, but self-pollination also occurs.
Literally thousands of selections exist worldwide. In South Africa, a number of selections were made with only Fan Retief being grown successfully on a commercial scale. However, Guava Wilting Disease (GWD) had a devastating effect on these plantings and with no suitable control measures available an alternative more tolerant cultivar was sought. GWD, caused by an Acromonium sp. and reported for the first time in 1981 in South Africa is present in most of the guava-producing areas of Mpumalanga and the Limpopo Province. As a result of this disease the total hectarage of guavas in the southern Lowveld of Mpumalanga has decreased by 80% in the period 1982 to 1994. Restrictions have been placed on the transport of guava planting material in terms of existing plant quarantine legislation, and plant material may not be taken out of the affected areas
No chemical control measures have been registered against GWD, and eradication and replacement with GWD tolerant cultivars is the only control measure. The TSG2 selection has been identified by the Agricultural Research Council (ARC) in South Africa as being the most tolerant to GWD and is recommended as both a rootstock and cultivar. The fruit is larger than that of Fan Retief with a similar fruit flesh to fruit breadth ratio. TSS (Total Soluble Solids) are slightly higher than Fan Retief. The fruit flesh colour is darker and pinker than the Fan Retief.
Du Roi Multiplant produces TSG2 trees which can be used for commercial orchard establishment or as rootstocks for GWD susceptible cultivars. Our motherblock is inspected annually by the ARC-ITSC to certify quality and true-to-type plants.
Plants are produced throughout the year, and trees can be delivered as a rooted plugs or field-ready bags.
For further technical information, we recommend the following book published by the Agricultural Research Council (ARC).
The Cultivation of Guava
Author: Mr E.A. de Villiers
The book can be obtained in the following ways :
Contact: ARC – Mrs Estelle Nieuwenhuis
Tel No: 013 753 7000
Important aspects of commercial guava production, such as production areas, climatic and soil requirements, soil preparation, irrigation and fertilization, pests, disease and weed control and post-harvest handling of fruits, are provided in this book.