Efficacy of soil solarization, Trichoderma harzianum, and coffee pulp amendment against Armillaria sp
2003
Otieno, W. | Termorshuizen, A. | Jeger, M. | Othieno, C.O.
Soil solarization was evaluated singly or in combination with Trichoderma harzianum infestation or coffee pulp amendment for its effect on wood-borne inoculum of an Armillaria sp. pathogenic on tea. Solarization increased maximum soil temperatures at 10 cm depth by 9-12 degrees C and reduced viability of Armillaria sp. up to 100%. Its efficacy was similar at 5, 10, and 15 cm soil depths. Trichoderma harzianum applied to the soil surrounding the blocks of inoculum also significantly reduced viability of the pathogen. Application of 20 g of the wheat bran culture of the antagonist in every 1000 cm3 of soil surrounding the blocks of inoculum, following solarization for 5 week, caused total loss of Armillaria inoculum viability and was similar to 10 week of solarization without application of the antagonist. The coffee pulp amendment reduced inoculum viability slightly though this effect was apparent only in non-solarized soil.
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