Immunization for plants
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CTA. 1995. Immunization for plants. Spore 59. CTA, Wageningen, The Netherlands.
Permanent link to this item: http://hdl.handle.net/10568/47160
Bananas, rice, tobacco and vegetables are some of the crops that may benefit from a new concept in plant protection. The revolutionary method for crop disease control uses an 'activator' known as CGA 245705 which has been developed by Ciba-Geigy....
Bananas, rice, tobacco and vegetables are some of the crops that may benefit from a new concept in plant protection. The revolutionary method for crop disease control uses an 'activator' known as CGA 245705 which has been developed by Ciba-Geigy. This innovative approach, known scientifically as 'systemic activated resistance' (SAR), induces natural resistance when sprayed on a crop. The induced response is comparable to immunisation in humans and livestock. The SAR technique is fundamentally different from other methods of crop protection as it does not act on the disease organisms themselves, but stimulates the plant to activate its own defence mechanisms. The idea is to apply CGA 254704 to trigger plants to produce these defence mechanisms before any likelihood of infection can occur. The product helps protect rice from leaf blast, tobacco from blue mould, bananas from black and yellow sigatoka and some vegetable crops from downy mildew. The efficacy of CGA 245704 varies between plants species. Monocotyledons, such as wheat and rice, can be protected for the whole season with a single application at the seedling stage and trials have shown that rice seedlings can be treated before they are transplanted out in the field. Dicotyledons such as tobacco, and perennial crops such as bananas, have to be sprayed at regular intervals throughout the season. CGA 245704 is at an advanced stage of development. Trials in the UK over the last three years have shown yield results using SAR at least equivalent to levels using conventional disease control methods. The advantage with SAR however, is that the technique uses much lower doses than conventional fungicides. Applications degrade rapidly and have very short persistence in the environment. Dr D Nordmeyer Product Management Disease Control Ciba-Geigy Ltd CH-4003 Basle, SWITZERLAND