BTH处理对哈密瓜品质产量及抗叶部病害的影响

Effect of BTH Treatment on Yield, Quality, and Resistance to Leaf Disease of Hami Melon

以厚皮甜瓜哈密瓜‘早皇后’品种(CucumismeloL.var.inodorusJacq.EarlyQueen)为试材,研究BTH、Amistar和KDF在甜瓜生长期处理对果实品质、产量、抗病性的影响。试验采用完全随机区组设计,在甜瓜生长期,施用药剂,对其对甜瓜品质等指标进行评价。结果表明:三种处理能够提高甜瓜果实可溶性固形物的含量,对单果重量、单位面积的产量、果实硬度影响较小。BTH处理使果形指数下降,KDF提高了果实整齐度。各处理改善了果实色泽,减少了果皮裂纹。Amistar、BTH和KDF处理使果实病害指数分别下降了14.9%和12.4%,1级果率提高5.9%和5.2%。各处理均降低了甜瓜叶部白粉病病害指数。BTH处理的细菌性角斑病的发病指数比对照降低了0.95。BTH处理对甜瓜品质、产量没有影响,降低了甜瓜果实病害,抑制了白粉病和细菌性角斑病的发展。

Hami melon ＂Early Queen＂ was used to study the effect of BTH （benzothiadiazole）, Amistar, KDF （kang du feng） treatment on quality, yield and resistance to leaf and fruit disease of hami melon, used a randomised complete block design, during growth period. The soluble solid content （SSC）, firmness, single fruit weight, and yield of melon, and resistance to fruit and leaf disease of melon were investigated. The results indicated that all three treatments can increase SSC, single fruit weight and yield of melon fruit. Index of fruit shape decreased by BTH treatment and increased by KDF treatment at harvest. Fruit color and cracking was improved due to treatments during development of melon. Indexes of fruit disease treated with Amistar, BTH and KDF declined at 14.9% and 12.4% respectively. Index of bacterial spot of leaf treated BTH compared with CK reduced at 0.95. Quality and yield of melon was not affected by BTH treatment. Disease of fruit and leaf of powdery mildew and bacterial spot were suppressed by BTH treatment during development stages of melon.