Susceptibility of the diamondback moth, Plutella xylostella (L) (Lepidoptera; Yponomeutidae), to insecticide sprays on cabbage
Susceptibilidad de la alevilla dorso de diamante, Plutella xylostella (L.) (Lepidoptera:Yponomeutidae), a los insecticidas aplicados al repollo en Puerto Rico
| dc.creator | ||
| dc.date | 1990-04-01 | |
| dc.date.accessioned | 2022-11-04T15:29:55Z | |
| dc.date.available | 2022-11-04T15:29:55Z | |
| dc.identifier | https://revistas.upr.edu/index.php/jaupr/article/view/6548 | |
| dc.identifier | 10.46429/jaupr.v74i2.6548 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5123152 | |
| dc.description | Three field trials with cabbage var. Market Prize were established at the Isabela Substation, AES-UPR, to evaluate the susceptibility of Plutella xylostella to various insecticides. Dosages recommended by the manufacturer were used for the first two applications in the first trial, and some double dosages were included in an attempt to get at least a 90% control of the larvae population. For the other two trials, recommended dosages and the effective higher dosages from the first trial were compared. Significant differences were obtained with methamidophos (2.34 L/ha), permethrin (0.234 and 0.468 l/ha), and fenvalerate (0.35 L/ha) for controlling the larvae. Control figures for those four treatments were 97.8, 100, 100, and 99.9%, respectively. Methamidophos, acephate, and naled controlled over 90% of the larvae only with double the recommended rates. Chlorpyrifos at 1.17 L/ha was ineffective, but at its higher rate controlled 80 to 90% of the larvae. Diazinon, methomyl, dimethoate, and endosulfan even at their highest rates were ineffective for controlling the larvae. The number of larvae increased after each application of these insecticides. The greatest numbers of marketable heads were obtained from plots treated with permethrin, fenvalerate, and methamidophos at the highest rate for each. | en-US |
| dc.description | Se establecieron tres experimentos de campo con repollo, variedad Market Prize, en la Subestación de Isabela, UPR-EEA, para evaluar la resistencia de Plutella xylostella a varios insecticidas. En el primer ensayo se usaron las dosis recomendadas por el fabricante para las primeras dos aplicaciones y subsecuentemente se duplicaron para tratar de conseguir un 90% de control. En los otros dos ensayos se evaluaron las dosis recomendadas que fueron eficaces y las dosis dobles que también lo fueron en el primer ensayo. Se obtuvieron diferencias significativas con metamidofos (2.34 l./ha.), permetrina (0.234 y 0.468 l./ha.) y fenvalerato (0.351 l./ha.) Los porcentajes de control obtenidos fueron 97.8, 100, 100 y 99.9, respectivamente. Metamidofos, acefato y naled reprimieron sobre el 90% de la larva solo cuando se utilizó el doble de la dosis recomendada. Clorpirifos a razón de 1.17 L/ha. fue ineficaz para combatir la larva, pero se obtuvo de 80 a 89% de mortandad cuando la dosis se duplicó. Diazinon, metomilo, dimetoato y endosulfan fueron ineficaces aún con dosis aumentadas. Las larvas mostraron una tendencia a aumentar después de cada aplicación de estos insecticidas. El mayor número de repollos comerciaies se obtuvo en las parcelas tratadas con permetrina, fenvalerato y metamidofos en sus dosis más altas. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | University of Puerto Rico Mayagüez Campus Agricultural Experiment Station | en-US |
| dc.relation | https://revistas.upr.edu/index.php/jaupr/article/view/6548/5201 | |
| dc.rights | Derechos de autor 2017 Journal of Agriculture of the University of Puerto Rico. | es-ES |
| dc.source | The Journal of Agriculture of the University of Puerto Rico; Vol. 74 No. 2 (1990): Vol. 74, No. 2, April 1990; 153-166 | en-US |
| dc.source | Journal of Agriculture of the University of Puerto Rico; Vol. 74 Núm. 2 (1990): Vol. 74, No. 2, April 1990; 153-166 | es-ES |
| dc.source | 2308-1759 | |
| dc.source | 0041-994X | |
| dc.source | 10.46429/jaupr.v74i2 | |
| dc.subject | Cabbage--Diseases and pests--Puerto Rico | en-US |
| dc.subject | Cabbage--Diseases and pests--Control | en-US |
| dc.subject | Plutellidae | en-US |
| dc.subject | Herbicides | en-US |
| dc.title | Susceptibility of the diamondback moth, Plutella xylostella (L) (Lepidoptera; Yponomeutidae), to insecticide sprays on cabbage | en-US |
| dc.title | Susceptibilidad de la alevilla dorso de diamante, Plutella xylostella (L.) (Lepidoptera:Yponomeutidae), a los insecticidas aplicados al repollo en Puerto Rico | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |