Abstract
Thiabendazole (TBZ) and pentachloronitrobenzene (PCNB) alone and in combination were laboratory, greenhouse, and field tested during a five-year period (1977-1982) for their effectiveness in reducing incidence and severity of damage caused byRhizoctonia solani to white potato (Solarium tuberosum). Growth ofR. solani on amended potato dextrose agar was prevented at 7 ppm TBZ and 80,000 ppm PCNB. Tuber-borne sclerotial germination and hyphal growth were prevented following seed treatment with 6,000 ppm TBZ, and severely inhibited by combination treatments of 12,500 or 50,000 ppm PCNB and 1,500 ppm TBZ. Seed treatments which provided the most effective field control ofR. solani were combinations of PCNB (50,000, 25,000 ppm) and TBZ (1,500 ppm), followed by TBZ alone (6,000 ppm) and PCNB alone at rates of 50,000 ppm or above.
Resumen
El tiabendazole (TBZ) y el pentacloronitrobenceno (PCNB) solos o combinados fueron sometidos a prueba de laboratorio, invernadero y campo durante un periodo de cinco años (1977-1982) respecto a su efectividad en reducir la incidencia y la severidad del daño causado porRhizoctonia solani en la papa blanca (Solanum tuberosum). Se previno el crecimiento deR. solani en papa dextrosa agar modificado con 7 ppm de TBZ y 80 000 ppm de PCNB. La germinación de esclerotes originados en los tubérculos y el crecimiento de hifas fueron prevenidos después de un tratamiento de la semilla con 6 000 ppm de TBZ y severamente inhibidos por tratamientos de combinaciones de 12 500 ó 50 000 ppm de PCNB y 1 500 ppm de TBZ. Los tratamientos de la semilla que proporcionaron el más efectivo control de campo, fueron combinaciones de PCNB (50 000, 25 000 ppm) y TBZ (1 500 ppm) seguidas por TBZ solo (6 000) y PCNB solo a dosis de 50 000 ppm ó más.
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Leach, S.S., Murdoch, C.W. Evaluation of thiabendazole and pentachloronitrobenzene for control of the Rhizoctonia disease complex on white potato (Solanum tuberosum L.). American Potato Journal 62, 459–469 (1985). https://doi.org/10.1007/BF02854519
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DOI: https://doi.org/10.1007/BF02854519