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Investigations on a seedling die-back of Theobroma cacao L. in Nigeria, 1: Description of the disease and its spread in the nursey

by Chant, S.R.
Publisher: Abr 1959Subject(s): THEOBROMA CACAO | PLANTULAS | MARCHITEZ DESCENDENTE | PHYTOPHTHORA | ENFERMEDADES FUNGOSAS | SINTOMAS | TEJIDOS VEGETALES | TRANSMISION DE ENFERMEDADES | VIVEROS | THEOBROMA CACAO | SEEDLINGS | DIEBACK | PHYTOPHTHORA | FUNGAL DISEASES | SYMPTOMS | PLANT TISSUES | DISEASE TRANSMISSION | PLANT NURSERIES | THEOBROMA CACAO | PLANTULE | DEPERISSEMENT TERMINAL | PHYTOPHTHORA | MALADIE FONGIQUE | SYMPTOME | TISSU VEGETAL | TRANSMISSION DES MALADIES | PEPINIERE In: Tropical Agriculture (Trinidad y Tobago) v. 36(2) p. 138-144Summary: The symptoms of a seedling die-back disease of cacao are described. Difficulty in obtaining pure culture of the causal agent [Phytophthora sp. near P. palmivora (Butl.) Butl.] from infected plants was overcome by inoculating cacao pods and egg-plant fruits with portions of infected stems. Inoculation experiments confirmed the observation that only young seedlings, less than eight weeks old, are susceptible to infection. Humid conditions are apparently a pre-disposing factor for the disease. The disease appears in the first instance to occur at random in the nursery but subsequent spread is apparently from infected to adjacent plants.
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++ Ilus. 3 tab. 7 ref. Sum. (En)

The symptoms of a seedling die-back disease of cacao are described. Difficulty in obtaining pure culture of the causal agent [Phytophthora sp. near P. palmivora (Butl.) Butl.] from infected plants was overcome by inoculating cacao pods and egg-plant fruits with portions of infected stems. Inoculation experiments confirmed the observation that only young seedlings, less than eight weeks old, are susceptible to infection. Humid conditions are apparently a pre-disposing factor for the disease. The disease appears in the first instance to occur at random in the nursery but subsequent spread is apparently from infected to adjacent plants.

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