produits de contact
English translation: Direct application products
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| 17:55 Mar 8, 2004 |
| French to English translations [PRO] Botany / orchard management | |||||||
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|  Selected response from: sktrans Local time: 17:43 | ||||||
Grading comment
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| 5 +1 | contact whatever (specify) |
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| 4 +1 | Direct application? |
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| Discussion entries: 1 | |
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Answers
19 mins confidence: 
peer agreement (net): +1
peer agreement (net): +1Direct application? Explanation: Could it be direct application of product |
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Grading comment
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26 mins confidence: peer agreement (net): +1
peer agreement (net): +1contact whatever (specify) Explanation: In the world of pesticides, every category has its own specialized terminology. Some of these terms can be used interchangeably and our colleagues still know what we mean. For example, the term “contact” pesticide works pretty well whether we are referring to a herbicide, insecticide, or fungicide; when the pesticide comes in contact with the pest, some or all of the pest is killed or inhibited. In the first case, the insect that comes in contact (for example, while eating or walking on leaves) with the insecticide is killed. In the second case, the herbicide enters and kills only the parts of the plant that are directly exposed to it. Finally, in the third case, a fungus that attempts to infect a plant sprayed with a contact fungicide is not successful. These pest-control processes are quite different; and, although we can and do get by with the simple terminology, contact fungicides are more appropriately referred to as protective–contact. Unlike a contact herbicide, a protective–contact fungicide does not enter the plant at all but rather acts as an exterior shield that protects the plant or seed from certain fungi for some period of time. Uniform spray coverage is vital (how well does a shield work if it is filled with holes?). The length of protection that the protective fungicide provides depends on many factors. As with any pesticide, rainfall or irrigation within a couple of hours after application washes away much of the pesticide residue and greatly reduces the protective value. Even after drying on the plant surface, residues of a protective fungicide may continue to be eroded via rain, dew, vaporization, sunlight, etc., thus reducing the protection. Furthermore, as the plant tissues expand or are replaced, the new tissue is left unprotected. For these reasons, protective–contact fungicides need to be reapplied more often (have a shorter application interval) than systemic fungicides. [http://www.ag.uiuc.edu/cespubs/hyg/html/200112g.html] Do I get the points, do I, huh, do I? -------------------------------------------------- Note added at 2004-03-08 18:23:24 (GMT) Post-grading -------------------------------------------------- 850 hits for \"contact fungicide\", along the lines of <<A contact fungicide (Daconil Weatherstik at 6.0 fl oz/1000 sq ft) and a systemic fungicide (Heritage 50W at 0.4 oz/1000 sq ft) were applied once in spray >> |
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