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An experiment to observe the effect of some cultural practices and its relationship to web blight disease of beans caused by T. cucumeris was carried out in Caisan, Republic of Panama. It included the use of no-tillage, conventional tillage, benomyl applications (500 g P.C./ha), 15, 30, 45 and 60 days after emergence, the use of CVS Chileno (susceptible) and Renacimiento (moderately resistant) and 3 plant densities (200,000, 160,000 and 120,000 plants/ha). The results showed that no-tillage delayed the eppidemic on set by preventing rainsplashing through the barrier dom by the mulch present in the soil. A higher yield and lower disease was observed in plots with no-tillage compared to plots having conventional tillage. Agood disease control was observed when plots were sprayed four times with benomyl with a reduction in the apparent infection rate and increase of yield. No difference was observed between the varieties Chileno and Renacimiento. Both varieties were susceptible when exposed to the infection pressure present in the region. The highest density (200 thoustand plants) showed a better effect in reducing rainsplashing when compared to the lower densities tested. An integrated program with mulching to reduce rainsplashing and benomyl applications to reduce the aparent infection rate is highly recomended to control web bligth.
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| Format: | Digital revista |
| Language: | spa |
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Instituto de Innovación Agropecuaria de Panamá
1990
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/523 |
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| Summary: | An experiment to observe the effect of some cultural practices and its relationship to web blight disease of beans caused by T. cucumeris was carried out in Caisan, Republic of Panama. It included the use of no-tillage, conventional tillage, benomyl applications (500 g P.C./ha), 15, 30, 45 and 60 days after emergence, the use of CVS Chileno (susceptible) and Renacimiento (moderately resistant) and 3 plant densities (200,000, 160,000 and 120,000 plants/ha). The results showed that no-tillage delayed the eppidemic on set by preventing rainsplashing through the barrier dom by the mulch present in the soil. A higher yield and lower disease was observed in plots with no-tillage compared to plots having conventional tillage. Agood disease control was observed when plots were sprayed four times with benomyl with a reduction in the apparent infection rate and increase of yield. No difference was observed between the varieties Chileno and Renacimiento. Both varieties were susceptible when exposed to the infection pressure present in the region. The highest density (200 thoustand plants) showed a better effect in reducing rainsplashing when compared to the lower densities tested. An integrated program with mulching to reduce rainsplashing and benomyl applications to reduce the aparent infection rate is highly recomended to control web bligth. |
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