Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize.
Neem oil was evaluated against fall armyworm Spodoptera frugiperda (J. E. Smith) on plants of two maize lines, one resistant and another one susceptible, planted in Poza Rica, Veracruz, México. The objective of this study was to compare biological development of resistant and susceptible maize plant...
| Main Authors: | , , , , , |
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| Format: | Online |
| Language: | spa |
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Instituto de Ecología, A.C.
2010
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| Online Access: | https://azm.ojs.inecol.mx/index.php/azm/article/view/675 |
| _version_ | 1799770069331345408 |
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| author | Gutiérrez-García, Socorro del Carmen Sánchez-Escudero, Julio Pérez-Domínguez, Juan Francisco Carballo-Carballo, Aquiles Bergvinson, David Aguilera-Peña, María Martha |
| author_facet | Gutiérrez-García, Socorro del Carmen Sánchez-Escudero, Julio Pérez-Domínguez, Juan Francisco Carballo-Carballo, Aquiles Bergvinson, David Aguilera-Peña, María Martha |
| author_sort | Gutiérrez-García, Socorro del Carmen |
| collection | AZM |
| description | Neem oil was evaluated against fall armyworm Spodoptera frugiperda (J. E. Smith) on plants of two maize lines, one resistant and another one susceptible, planted in Poza Rica, Veracruz, México. The objective of this study was to compare biological development of resistant and susceptible maize plants infested by fall armyworm and sprayed with neem oil under field conditions. A concentration of 20,8% neem oil, was applied on the upper leaves and whorl according to the following treatments: before artificial infestation, one and two weeks after infestation; in addition, a chemical insecticide (Permetrin) and one control (water) were included. In an experiment comparing different doses, neem was applied 3 times at concentrations of 20,8, 2,0 and 0,20%; with a Permetrin and water control included for comparison. Damage to foliage, flowering, plant height, and yield were then recorded. In the experiment to determine time of application the susceptible line showed severe damage from 6,7 to 8,1 on a scale from 0-9. while the resistant line exhibited damage ranging from 4,6 to 6,0. For the neem oil dose experiment, plants in both lines during the winter cycle showed damage ranging from 4,4 to 6,2, while during the spring-fall season damage was from 6,2 to 8,5. Flowering was not affected by application dates. However in the experiment with different neem oil concentrations, for the 20,8% treatment flowering was accelerated up to 7,4 days when compared to the control. No differences were found among treatments on in plant height. The treatment with 20,8% neem oil showed low defoliation, but yields were low at this high doses due to phytotoxicity. Weekly application of 2% neem oil gave more than best protection when applied before pest infestations. |
| format | Online |
| id | azm-article-675 |
| institution | Acta Zoológica Mexicana |
| language | spa |
| publishDate | 2010 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-6752022-08-23T20:49:56Z Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. Efecto del Nim en el daño ocasionado por el gusano cogollero Spodoptera Frugiperda (smith) (Lepidoptera: Noctuidae) en tres variables agronómicas de maíz resistente y susceptible Gutiérrez-García, Socorro del Carmen Sánchez-Escudero, Julio Pérez-Domínguez, Juan Francisco Carballo-Carballo, Aquiles Bergvinson, David Aguilera-Peña, María Martha biological development neem phytotoxicity Azadirachta indica maize Spodoptera frugiperda. Desarrollo biológico fitotoxicidad nim Azadirachta indica maíz Spodoptera frugiperda. Neem oil was evaluated against fall armyworm Spodoptera frugiperda (J. E. Smith) on plants of two maize lines, one resistant and another one susceptible, planted in Poza Rica, Veracruz, México. The objective of this study was to compare biological development of resistant and susceptible maize plants infested by fall armyworm and sprayed with neem oil under field conditions. A concentration of 20,8% neem oil, was applied on the upper leaves and whorl according to the following treatments: before artificial infestation, one and two weeks after infestation; in addition, a chemical insecticide (Permetrin) and one control (water) were included. In an experiment comparing different doses, neem was applied 3 times at concentrations of 20,8, 2,0 and 0,20%; with a Permetrin and water control included for comparison. Damage to foliage, flowering, plant height, and yield were then recorded. In the experiment to determine time of application the susceptible line showed severe damage from 6,7 to 8,1 on a scale from 0-9. while the resistant line exhibited damage ranging from 4,6 to 6,0. For the neem oil dose experiment, plants in both lines during the winter cycle showed damage ranging from 4,4 to 6,2, while during the spring-fall season damage was from 6,2 to 8,5. Flowering was not affected by application dates. However in the experiment with different neem oil concentrations, for the 20,8% treatment flowering was accelerated up to 7,4 days when compared to the control. No differences were found among treatments on in plant height. The treatment with 20,8% neem oil showed low defoliation, but yields were low at this high doses due to phytotoxicity. Weekly application of 2% neem oil gave more than best protection when applied before pest infestations. En dos experimentos realizados durante dos ciclos de cultivo de maíz, se evaluó el efecto de un formulado de aceite de nim Azadirachta indica A. Juss en larvas de gusano cogollero Spodoptera frugiperda (J. E. Smith). El objetivo fue conocer el daño ocasionado por el gusano cogollero en plantas de maíz resistente (CML-67) y maíz susceptible (CML-131) ambas tratadas con nim, en campo. En un primer experimento se evaluaron épocas de aplicación del aceite de A. indica en dos líneas de maíz, una resistente (CML-67) y otro susceptible (CML-131) a S. frugiperda cultivados en Poza Rica, Veracruz, México. El aceite en concentración de 20,8%, se aplicó sobre las hojas superiores y cogollo, con los siguientes tratamientos: cuatro horas, antes de la infestación artificial con larvas de primer ínstar, 7 y 14 días después de la infestación; se incluyó un tratamiento con el insecticida químico Permetrina y un testigo absoluto (sólo agua). En el segundo experimento, sobre las mismas dos líneas de maíz, CML-67 y CML-131 se aplicaron las concentraciones 20,8, 2,0 y 0,20% de aceite de A. indica. Cada tratamiento se aplicó tres veces sin intervalo fijo durante la etapa vegetativa del cultivo, se incluyó al insecticida Permetrina y al testigo absoluto. Se registró el daño foliar mediante la escala estandarizada de daño de Mihm del 0 al 9, altura de la planta y el rendimiento. En las fechas de aplicación del nim, el daño foliar de la línea susceptible osciló de 6,7 a 8,1 en promedio, según la escala de Mihm, representó alto daño y en la línea resistente, daño foliar moderado (4,6 a 6,0). En el experimento de concentraciones de nim, en el ciclo I se observaron daños de 4,4 a 6,2 en promedio y en el ciclo P-V los daños fueron de 6,5 a 8,5 en ambas líneas. La floración no presentó diferencias significativas en las diferentes fechas de aplicación, mientras que en el experimento de diferentes concentraciones el tratamiento 20,8% de aceite de A. indica se adelantó 7,4 días con respecto al testigo. No se encontraron diferencias al cuantificar la altura. No obstante para el tratamiento con 20,8% de aceite de A. indica la defoliación fue menor y no se obtuvieron buenos rendimientos, se apreció que a esta concentración de aceite, A. indica causó fitotoxicidad. El nim permitió mayor protección cuando se aplicó antes de que se presentara la plaga a concentraciones menores al 2% y se reforzó con posteriores aplicaciones a intervalos de una aplicación por semana. Instituto de Ecología, A.C. 2010-04-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Original articles Artículos originales application/pdf https://azm.ojs.inecol.mx/index.php/azm/article/view/675 10.21829/azm.2010.261675 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 26 No. 1 (2010); 1-16 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 26 Núm. 1 (2010); 1-16 2448-8445 0065-1737 spa https://azm.ojs.inecol.mx/index.php/azm/article/view/675/844 Derechos de autor 2010 ACTA ZOOLÓGICA MEXICANA (N.S.) http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Gutiérrez-García, Socorro del Carmen Sánchez-Escudero, Julio Pérez-Domínguez, Juan Francisco Carballo-Carballo, Aquiles Bergvinson, David Aguilera-Peña, María Martha Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. |
| title | Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. |
| title_full | Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. |
| title_fullStr | Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. |
| title_full_unstemmed | Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. |
| title_short | Effect of Neem on damage caused by fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and three agricultural variables on resistant and susceptible maize. |
| title_sort | effect of neem on damage caused by fall armyworm spodoptera frugiperda (smith) (lepidoptera: noctuidae) and three agricultural variables on resistant and susceptible maize. |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/675 |
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