Evaluation of the Severity of Leaf Spot Disease on Growth of Oil Palm Seedlings in Pre-nursery Stage
Keywords:
Oil palm seedling, growth, leaf spotAbstract
The experiment was conducted during July to October 2017 in pre-nursery stage at Agricultural Innovation and Management Division (Plant Science), Faculty of Natural Resources, Prince of Songkla University. This research aims to select the oil palm Sub-PSU1 which have agricultural traits and resistant to Curvularia sp. from 27 crosses. A complete randomized design (CRD) was used to verify agronomic characters from 5 normal seedlings/cross and 100 seedlings/cross for evaluation of the disease symptom. The agronomic characters including the leaf length, trunk diameter, leaf number, total fresh weight and total dry weight were evaluated. The result showed that 17 crosses had high of those characters including no. 59, 142, 171, 177, 184, 201, 203, 207, 222, 227, 229, 230, 232, 237, 239, 240 and 202/6. For disease resistance, there were 19 crosses that have potentially resist to the diseases including, no. 142, 237, 202/6, 171, 177, 184, 201, 203, 207, 222, 227, 229, 230, 232, 239, 240, 59, 81 and 118, respectively. There were only 17 crosses that were resistant to the disease and had high agricultural characteristics including, no. 59, 142, 171, 177, 184, 201, 230, 207, 222, 227, 229, 230, 232, 237, 239, 240 and 202/6, respectively.
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