ANALYSYS OF PRSV-W EPIPHYTIES IN TREATED PLOTS OF MELON WITH INSECTICIDES AND REFLECTIVE SILVER COVERING IN PANAMA-AZUERO. 1997.
For a better understanding of the effects of agricultural oil; reflective silver covering, insecticide pymetrozina mix with agricultural oil pymetrozina alone, and a regional treatment (organophosphates, carbonate and pyretroide, insecticides alternate every week) on epiphyties of PRSV-W. The incidence of plants affected by PRSV-W was weekly assessed and detected with ELISA test, and twice a week was estimated the population of winged and wingless aphids in the foliage of melon plots at the experimental station of IDIAP, located in “Villa de Los Santos” from January to march of 1997. The data analyzed showed highly significant differences within treatments in virus incidence and population of winged aphids (P<0.0007 and P<0.0013). The best yields were obtained with the mixture of agricultural oil pymetrozina and the lowest virus incidence with the reflective silver covering. The models that better explainedd the virus incidence curves were logistic and Gompertz models. The agricultural oil pymetrozina treatment has a coefficient of determination of R2= 0.990 (P<0.0001), the rate of apparent infection was of 0.187 and the maximum rate of growth (dy/dt = 53.24%) was detected between 34 and 48 days after sowing and the area under disease progress curves was AUDPC= 482.9. The increment in production when comparing the AUDPC of the regional and the agricultural oil pymetrozina treatments was 38.13%. The efficient management of polycyclic virus diseases required reduction of the initial population of the vector and the sources of initial inoculum, to lower the rate of disease increment.
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Innovación Agropecuaria de Panamá
2003
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/363 |
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| Summary: | For a better understanding of the effects of agricultural oil; reflective silver covering, insecticide pymetrozina mix with agricultural oil pymetrozina alone, and a regional treatment (organophosphates, carbonate and pyretroide, insecticides alternate every week) on epiphyties of PRSV-W. The incidence of plants affected by PRSV-W was weekly assessed and detected with ELISA test, and twice a week was estimated the population of winged and wingless aphids in the foliage of melon plots at the experimental station of IDIAP, located in “Villa de Los Santos” from January to march of 1997. The data analyzed showed highly significant differences within treatments in virus incidence and population of winged aphids (P<0.0007 and P<0.0013). The best yields were obtained with the mixture of agricultural oil pymetrozina and the lowest virus incidence with the reflective silver covering. The models that better explainedd the virus incidence curves were logistic and Gompertz models. The agricultural oil pymetrozina treatment has a coefficient of determination of R2= 0.990 (P<0.0001), the rate of apparent infection was of 0.187 and the maximum rate of growth (dy/dt = 53.24%) was detected between 34 and 48 days after sowing and the area under disease progress curves was AUDPC= 482.9. The increment in production when comparing the AUDPC of the regional and the agricultural oil pymetrozina treatments was 38.13%. The efficient management of polycyclic virus diseases required reduction of the initial population of the vector and the sources of initial inoculum, to lower the rate of disease increment. |
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