Improving the yield performance of cabbage in clubroot infested soil in Northern Philippines using beneficial microorganism
2011
Nagpala, A.L. | Bulcio, J.M., Benguet State Univ., La Trinidad, Benguet (Philippines). Dept. of Plant Pathology
Clubroot (Plasmodiophora brassicae) is an obligate parasite. This soilborne fungi thrives in the soil as resting spore for eight years even in the absence of its host. It is the number one disease causing yield reduction of crucifers in Northern Philippines. The study aimed to improve the performance of cabbage in a heavily clubroot infested field using Trichoderma sp. in combination with calcium oxide (CaO). The experiment consisted of nine treatments with plot size of 1x10 sq m replicated four times following the randomized Complete Block Design. Trichoderma at 10, 15 and 20 g rates were inoculated and mixed in the soil before transplanting. Calcium oxide and flusulfamide, at 8 tons and 200 kg/ha, respectively and farmers' practice were included as treatments for comparison. The effectiveness of Trichoderma was based on the fresh and dry root weights, top weight, head circumference, yield, disease severity and % control. Under field conditions, cabbage applied with 20g Trichoderma sp. had the highest fresh root and oven dry weights of 131.25g and 10.95g; highest fresh and top dry weight of 700g and 200g, respectively after 82 days. The same treatment produced the widest polar head circumference of 47.91cm and highest marketable yield of 33 t/ha at harvest. Similarly, the 20g rate resulted in slight clubroot infection and high control of 80%. Trichoderma is as effective as Flusulfamide in reducing clubroot severity.
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