Efficacy of Terbutol in Broomrape Control and Broadbean Improvement

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Abstract
Investigations are being undertaken to develop a practical control measure for broomrape (Orobanche spp.) parasitism of broadbeans. In previous work some candidate chemicals were found to be effective but failed to reach practical use in the field for one reason or another. The present investigation deals with the use of a carbamate compound named terbutol (Azak). In six successive seasons (1966–72) at different localities, terbutol was continuously tested. The findings of the investigations can be summed up as follows: 1. The best results were given by terbutol at the rate of 10 kg/feddan pre-plant, provided that the herbicide was deeply incorporated into the soil by mechanical ploughing. 2. Application of the herbicide as a dust appeared to be acceptable. 3. The broadbean plants were found to be completely tolerant to terbutol: no adverse effects were noticed whatsoever. 4. Terbutol was responsible for an improvement in the host plant development

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