摘要:
分别采用0,50,100,200和300 mg/L 5种不同浓度的BTH处理"象牙芒"和"台农"两个芒果品种,72 h后,用炭疽病菌对其进行损伤接种,贮于15℃和相对湿度为75，～85，条件下.通过对果实发病率、病班面积、色泽和硬度变化研究表明,在50～300 mg/L范围内,BTH处理均有不同程度的处理效果.其中,"象牙芒"采用200 mg/L,"台农"采用50 mg/L的BTH处理效果最好,均能显著降低芒果果实炭疽病的发病率、色泽的转黄程度和果实软化,有效延缓果实病斑面积扩展速度和大小.
Abstract:
Two varieties of mango ("Nang klangwan" and "Tainong") were treated with BTH (benzothiadiazole) at 0, 50,100, 200 and 300 mg/L. After 72 h, and inoculated with Colletotichum gloeosporioides thereafter, and then stored at 15 ℃ and RH 75%-85%. Disease incidence of the fruit and changes in lesion area, color and luster and hardness were determined. The result showed that BTH treatments with concentrations within the range of 50-300 mg/L had inhibitive effect on anthracnose. The optimum concentration was 200 mg/L for "Nang klangwan" and 50 mg/L for "Tainong". The disease incidence of C.gloeosporioides, the changing degree of color and intenerating of fruit were significantly decreased, and the expansion offruit lesion area was markedly delayed.
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