Javier Casaccia Paraguay
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Transcript of Javier Casaccia Paraguay
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MINISTERIO DE AGRICULTURA Y GANADERIA
PARAGUAY
Eficiencia de coberturas vegetales en el control
de malezas en el cultivo de Ka´a he
´e/Stevia
Stevia rebaudiana (Bertoni) Bertoni.
Ing. Agr. Javier Casaccia
Esp. Fitosanidad
Bolivia 2014
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Objetivos
•Determinar la cobertura vegetal mas efectiva para
el control de malezas en Stevia.
•Determinar la cobertura vegetal mas efectiva en
mejorar la productividad del cultivo de Ka´a he´e/Stevia.
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Materiales y métodos
Ubicación
En la sede del Programa de Investigación del cultivo
de Ka´a he´e/Stevia, situada en el km 48,50
Caacupé, Departamento Cordillera Paraguay
latitud 25º 24;longitud 57º 06
altitud 228msnm
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Materiales y métodos
Preparación de las coberturas
Los rastrojos fueron colectados inmediatamente
posterior a la cosecha, en el caso del maiz,
poroto, Stevia y caña de azucar, en el caso del
guandu, vetiver en floracion. La torta de tartagoposterior a su procesamiento.
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Materiales y métodos
Preparación de las coberturas
Todas las coberturas fueron molidas con un
molino de martillos en fracciones cuyos tamaños
oscilaron de 10 a 30 mm. de longitud.
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Materiales y métodos
Tratamientos
T1 Testigo Absoluto
T2 Testigo CarpidaT3 Cobertura de Stevia rebaudiana (Bertoni) Bertoni
T4 Cobertura de Cajanus cajan
T5 Cobertura de Zea mays
T6 Cobertura de Vetiveria zizanioidesT7 Cobertura de Saccharum officinarum
T8 Cobertura de Vigna unguiculata
T9 Cobertura de Ricinus communis
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T 9
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T 3
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T 8
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T 7
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T 5
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T 5
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T 4
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T 2
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T 1
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Materiales y métodos
Variables a evaluar
Las variables a evaluar son las siguientes:
1. Numero de malezas (m2)2. Peso verde de malezas (g/m2)
3. Especies de malezas controladas
4. Rendimiento (g/m2) de hojas secas de Stevia.
5. Rendimiento (g/m2) de tallo de Stevia
Para evaluar los porcentajes de control de cada
tratamiento, será utilizada la escala (ALAM, 1974)
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Efecto de las coberturas vegetales sobre el numero de malezas por
metro cuadrado, 30 días después del transplante, CIHB 2013.
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Efecto de las coberturas vegetales sobre el numero de malezas por
metro cuadrado, 60 días después del transplante, CIHB 2013.
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Porcentaje de control , 60 días después del transplante, CIHB 2013.
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de control de malezas
Escala ALAM 1974.
Calificación Tratamientos
0-40 Ninguno Testigo absoluto
41-60 Regular
61-70 Suficiente
71-80 Bueno Testigo carpida- Cob. Poroto
81-90 Muy bueno Cob. Stevia – Tártago
91-100 Excelente Cob. Guandu-Maiz-Vetiver- Caña Azúcar.
Porcentaje de control de malezas 60 días después del transplante,
CIHB 2013.
Casaccia, J. 2013.
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Maleza
de control de
malezas Escala
ALAM 1974.
Calificación Tratamientos
Panicum maximum 0-40 Ninguno Testigo absoluto – Testigo carpida
41-60 Regular Cob. Stevia – Maiz
61-70 Suficiente
71-80 Bueno Cob. Poroto
81-90 Muy bueno Cob. Guandu–
Vetiver- Caña
Azúcar
91-100 Excelente
Porcentaje de control por especie de malezas 60 días después del
transplante, CIHB 2013.
Casaccia, J. 2013.
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Maleza
de control
de malezas
Escala ALAM
1974.
Calificación Tratamientos
Amaranthus deflexus 0-40 Ninguno Testigo absoluto - Cob. Poroto
41-60 Regular
61-70 Suficiente Cob. Stevia
71-80 Bueno Cob. Guandu - Maiz
81-90 Muy bueno
91-100 Excelente Testigo carpida–Cob. Vetiver–
Caña Azucar- Tartago
Porcentaje de control por especie de malezas 60 días después del
transplante, CIHB 2013.
Casaccia, J. 2013.
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Maleza
de control
de malezas
Escala ALAM
1974.
Calificación Tratamientos
Richardia brasiliensis 0-40 Ninguno Testigo absoluto
41-60 Regular Testigo carpida
61-70 Suficiente
71-80 Bueno Cob. Stevia
81-90 Muy bueno Cob. Guandu – Maiz - Poroto
91-100 Excelente Cob. Vetiver – Caña Azucar -
Tartago
Porcentaje de control por especie de malezas 60 días después del
transplante, CIHB 2013.
Casaccia, J. 2013.
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PRIMERA OPERACIÓN DE CARPIDA DESPUES
DEL TRANSPLANTE
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Rastrojos de Guandu
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Rastrojos de maíz
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COBERTURAS DE NYLON
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COBERTURA NYLON
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680 USD POR HA.
CONTROL DE MALEZAS
VINAGRE ACIDO ACETICO
)
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CAAGUAZU
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1º TECNOLOGIA DE APLICACION
HERBICIDAS ?
Periodo de carencia
EPI
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HERBICIDAS
Pre emergentes
Trifluralina 60%
Oxyfluorfen
Pos emergentes
GraminicidasCarfentrazone
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1. Previo a la plantación de la Stevia
Especies:
a. Crotalaria Crotalaria juncea 20 a 30 kg/ha
b. Mucuna Stizolobium cinereum 100 a 120
kg/ha
E F M A M J J A S O N D
T T
ABONOS VERDES
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MUCUNA
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CROTALARIA
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2. En cultivos ya establecidos de Stevia
Especies invernales:
a. Lupino blanco amargo Lupinus albus
E F M A M J J A S O N D
C3 C1 C1 C2 C2
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0
0.5
1
1.5
2
2.5
3
AE 1 AE 2 AE 3 AE 4
Número de operaciones de carpidas
manuales realizados hasta la poda de
uniformización, IAN 2003
CAV
SAV
Casaccia, J. 2003
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LINO
Linum usitatissimum
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ENELDO
Anethum graveolens
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3. Fuera del sistema de producción
Especies de primavera-verano:
a. Crotalaria 3.000 m2
b. Guandu Cajanus cajan
c. Vetiveria sp.
E F M A M J J A S O N D
C3 C1 C1 C2 C2
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Rastrojos de Cro talaria jun cea
R t j d G d
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Rastrojos de Guandu
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