Effects of Foliar Sprays of Phosphates on Powdery Mildew (Sphaerotheca pannosa) of Roses
Effects of Foliar Sprays of Phosphates on Powdery Mildew (Sphaerotheca pannosa) of Roses
复制标题
DOI：
10.1111/j.1439-0434.1994.tb00030.x
复制
发表时间：
1994-11
影响因子：
1.5
通讯作者：
R. Reuveni;V. Agapov;M. Reuveni;M. Raviv
中科院分区：
文献类型：
--
作者：
R. Reuveni;V. Agapov;M. Reuveni;M. Raviv
通过单次喷洒 25 mM K2HPO4、KH2PO4 加 KOH 或 NaHCO3 水溶液（全部加 Tween 20 (0.5 ml/l) 或 0.5 ml/l 丁吡酯 (Nimrod)），可显着控制 Rosa indica Major 当地克隆植物上的白粉病，该溶液在接种 Sphaerotheca pannosa var. var. 的分生孢子悬浮液前 4 天施用。玫瑰。与喷洒 KH2PO4 加 KOH、K2HPO4、NaHCO3 或丁吡酯的对照植物相比，病害发生率分别降低了 79%、71%、54% 和 50%。磷酸盐具有抑制作用，在发霉的叶子上单次喷洒后 2 天，99% 的脓疱和分生孢子就消失了。当使用大型受感染的温室种植植物时，这种处理在第一次施用后至少 9 天内有效。在同一株植物上重新施用这些盐后，病斑面积比施用前减少了约 90%。在早期（最多 2 天），磷酸盐和碳酸氢盐比内吸性杀菌剂丁吡酯具有更强的抑制作用。然而，碳酸氢盐和丁吡酯的抑制作用是短期的且不持久，而磷酸盐处理在实验终止时长达 23 天仍保持显着的抑制作用。鉴于磷酸盐可能被接受为理想的叶面肥料，应考虑将其用于田间疾病控制，讨论了磷酸盐的抑制和抑制效果。 Zusammenfassung Einflus von Blattbehandlungen mit Phosphaten auf den Echten Mehltau (Sphaerotheca pannosa) 和 Rosen Sphaerotheca pannosa var.蔷薇和普兰森蔷薇（Rosa indica Major-Klone durch eine einmalige Spritzbehandlung mit Losungen von K2HPO4、KH2PO4 + KOH），bzw。 NaHCO3，所有 Tween 20 (0.5 ml/1) 等，或在 0.5 ml/1 控制中使用 Bupirimat (Nimrod)，在 4 小时之前进行注射。
Powdery mildew on plants of a local clone of Rosa indica Major was significantly controlled by a single spray of 25 mM aqueous solutions of K2HPO4, KH2PO4 plus KOH, or NaHCO3, all plus Tween 20 (0.5 ml/l) or bupirimate (Nimrod) at 0.5 ml/l, which was applied 4 days before inoculation with conidial suspension of Sphaerotheca pannosa var. rosae. Disease incidence was reduced by 79, 71, 54 and 50%, as compared to controls on plants sprayed with KH2PO4 plus KOH, K2HPO4, NaHCO3 or bupirimate, respectively. Phosphates were suppressive and expressed by disappearance of 99% of the pustules and conidia, as early as 2 days after a single spray on mildewed foliage. This treatment was efficient for at least 9 days after the first application when large infected greenhouse-grown plants were used. Re-application of these salts on the same plants reduced the lesion area by about 90% from that recorded before the application. Phosphate and bicarbonate were more suppressive than the systemic fungicide bupirimate in the early period (up to 2 days). The suppresion effects of bicarbonate and bupirimate, however, were short-term and not persistent, while the phosphate treatments remained significantly suppressive for up to 23 days, when the experiment was terminated. The inhibitory and suppressive effectiveness of phosphate salts is discussed in the light of their possible acceptance as ideal foliar fertilizers which should be considered for use in the field for disease control. Zusammenfassung Einflus von Blattbehandlungen mit Phosphaten auf den Echten Mehltau (Sphaerotheca pannosa) an Rosen Sphaerotheca pannosa var. rosae wurde an Pflanzen einer Rosa indica Major-Klone durch eine einmalige Spritzbehandlung mit Losungen von K2HPO4, KH2PO4 plus KOH, bzw. NaHCO3, die alle Tween 20 (0.5 ml/1) enthielten, oder mit Bupirimat (Nimrod) bei einer Konzentration von 0,5 ml/1 kontrolliert, wenn die Behandlung 4 Tage vor der Inokulation mit Konidien des Pilzes vorgenommen wurde.