Combate de guinea (Panicum maximun) en macadamia (Macadamia integrifolia)
Archivos
Fecha
1992
Tipo
artículo original
Autores
Herrera Murillo, Franklin
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad de Costa Rica
Resumen
En Siquirres, provincia de Limón, entre setiembre de 1989 y enero de 1990, en un huerto de macadamia de dos años de edad, sembrado a 7 m x 7 m, se realizó un experimento con el fin de identificar tratamientos químicos que permitieran combatir zacate guinea (Panicum maximun) sin afectar la macadamia. Los tratamientos evaluados fueron: glifosato a 1,2 y 1,68 kg i.a./ha; haloxifop-metil y fenoxaprop-etil (isómero) a 0,13 y 0,17 kg i.a./ha, todos en dos volúmenes de aplicación, 100 y 200 l/ha; testigo deshierbado cada mes y testigo a libre crecimiento de malezas. Se usó un diseño de bloques completos al azar con cuatro repeticiones. Los herbicidas se aplicaron en bandas de 1,5 m a cada lado del árbol de macadamia. Se usó un equipo accionado por gas carbónico con boquillas 800050 para el volumen de 100 l/ha y 8001 para el de 200 l/ha. Al momento del la aplicación el zacate guinea tenía 0,7 m de altura y una cobertura del 85 %. Ninguno de los tratamientos mostró toxicidad a la macadamia. El mejor combate de zacate guinea se logró con glifosato 1,68 kg/ha en un volumen de 200 l/ha. Barreria sp. toleró la aplicación de glifosato y ocupó la mayor parte del nicho dejado por el guinea. Otras dicoliledóneas fueron favorecidas en su crecimiento al no ser afectadas por los herbicidas fenoxaprop-elil y haloxifop-melil.
An experiment was conducted in Siquirres- Limon, Costa Rica, between September 1989 and January 1990, on a two - year old macadamia orchard planted al 7 m x 7 m, to determine the chemical treatments which could control Guinea grass. The assayed treatments were: glyphosate al 1.2 und 1.68 kg a.i./ha, haloxyfop- methyl and fenoxaprop- ethyl (isomer) al 0.13 and 0.17 kg a.i./ha, respectively, in two application volumes of 100 and 200 l/ha. A monthly weeded and a free weed growth controls were included. A Complete Randomized block experimental design with four replications was used. The herbicides were applied as 1.5 m wide stripes on both sides of the macadamia tree, using a Ca, operated sprayer with a 800050 nozzle for the 100 l/ha volume and u 8001 nozzle for 200 l/ha. Al the lime of application, the Guinea grass was 0.7 m high and an 85 % covering. None of the treatments showed toxicity 10 the macadamia trees. The glyphosate al 1.68 kg/ha in a 200 l/ha volume showed the best guinea grass control. The Barreria sp. tolerated the glyphosate application and covered most of the apace left by the guinea grass. The growth of other dicotyledonous was favored by not being affected by fenoxaprop-ethyl and haloxyfop-methyl.
An experiment was conducted in Siquirres- Limon, Costa Rica, between September 1989 and January 1990, on a two - year old macadamia orchard planted al 7 m x 7 m, to determine the chemical treatments which could control Guinea grass. The assayed treatments were: glyphosate al 1.2 und 1.68 kg a.i./ha, haloxyfop- methyl and fenoxaprop- ethyl (isomer) al 0.13 and 0.17 kg a.i./ha, respectively, in two application volumes of 100 and 200 l/ha. A monthly weeded and a free weed growth controls were included. A Complete Randomized block experimental design with four replications was used. The herbicides were applied as 1.5 m wide stripes on both sides of the macadamia tree, using a Ca, operated sprayer with a 800050 nozzle for the 100 l/ha volume and u 8001 nozzle for 200 l/ha. Al the lime of application, the Guinea grass was 0.7 m high and an 85 % covering. None of the treatments showed toxicity 10 the macadamia trees. The glyphosate al 1.68 kg/ha in a 200 l/ha volume showed the best guinea grass control. The Barreria sp. tolerated the glyphosate application and covered most of the apace left by the guinea grass. The growth of other dicotyledonous was favored by not being affected by fenoxaprop-ethyl and haloxyfop-methyl.