Effect of Neutralized Phosphorus Acid on Powdery Mildew and Fruit Quality of Muskmelon (Cucumis melo L.) in Greenhouse

中和亞磷酸對洋香瓜白粉病與果實品質之影響

林楨祐(Chen-Yu Lin) ； 陳甘澍(Kan-Shu Chen) ； 黃雅穗(Ya-Suie Hwang) ； 羅惠齡(Hui-Ling Lo) ； 洪爭坊(Cheng-Fang Hong)

《台灣農業研究》 65卷3期 (2016/09) Pp. 261-268

https://doi.org/10.6156/JTAR/2016.06503.03

摘要

溫室甜瓜 (Cucumis melo L.) 為台灣高價值的水果之一，Podosphaera xanthii 引起的白粉病，可感染甜瓜的葉和藤蔓並造成品質和產量的下降。本研究比較不同中和亞磷酸和賽福座殺菌劑對設施內直立式洋香瓜栽培的影響，以兩種濃度 (1 g L^(-1) 和2 g L^(-1)) 之中和亞磷酸，並搭配兩種噴施間期 (每7 天1 次和每14 天1 次)，於著果期間每7 天評估各處理組的罹病程度，並於採收後調查果實鮮重、果肉厚度與總可溶性固形物。結果顯示在不同施用濃度下，每7 天噴施中和亞磷酸對白粉病的防治效果與賽福座殺菌劑沒有顯著的差異 (P =0.05)。然而，每14 天噴施中和亞磷酸1 g L^(-1) 則無法有效地降低白粉病罹病度。在各單一濃度下比較每7 天或14 天噴藥間期的影響，每7 d 噴藥間期對白粉病罹病程度有較佳的控制效果。在果實品質方面，每7 天噴施中和亞磷酸1 g L^(-1) 和每14 天噴施2 g L^(-1) 皆顯著增加果實的鮮重。整體而言，施用中和亞磷酸對果肉厚度與可溶性固形物的含量並無顯著提升，僅在第2 次的試驗中，每14 天噴施中和亞磷酸2 g L^(-1) 則有較佳的果肉厚度。因此，考量設施內洋香瓜果實品質的提昇和白粉病的控制，以每7 天噴施中和亞磷酸1 g L^(-1) 之處理應為較佳的選擇。

關鍵字

洋香瓜 ； 中和亞磷酸 ； 白粉病 ； 非農藥防治

並列摘要

Greenhouse-grown muskmelon (Cucumis melo L.) is one of the most high value fruit crops in Taiwan. Powdery mildew, caused by Podosphaera xanthii, can infect leaves and vines of muskmelon and result in huge loss of quality and yield. In this study, the efficiency of two concentrations (1 and 2 g L^(-1)) of neutralized phosphorus acid (NPA) applied at two spraying schedules (7- and 14-day intervals) on controlling powdery mildew were compared with triflumizole and a water control in greenhouse. Disease severity of powdery mildew among different treatments were evaluated every 7-d after fruit set. The fresh weight of fruit, flesh thickness and total soluble solid content were evaluated as fruit quality index after harvest. When NPA was applied at a 7-d interval, the efficiency on controlling powdery mildew were not significantly different (P = 0.05) with triflumizole. In contrast, when NPA was applied at 1 g L^(-1) at 14-d interval, the disease severity was not significantly different with the non-treatment control. Overall, the 7-d spraying schedule has a better control on powdery mildew no matter what concentration of NPA was applied. In the fruit quality analysis, NPA sprayed at 2 g L^(-1) at 14 days and 1 g L^(-1) at 7 days significantly increased the fresh weight of fruits when compared with untreated control. However, there was no significant differences (P = 0.05) between treatments on the flesh thickness and total soluble solid content of muskmelon except for applying NPA at 2 g L^(-1)/14-d in the second trial.

並列關鍵字

Cucumis melo L. ； Muskmelon ； Neutralized phosphorus acid (NPA) ； Powdery mildew ； Non-fungicide control