十字花科蔬菜黑腐病化學防治研究

Studies on Chemical Control of Crucifer Black Rot Caused by Xanthomonas Campestris Pv. Campestris

黃□昌(Tze-Chung Huang)

《臺東區農業改良場研究彙報》 4輯 (1990/12) Pp. 141-155

https://doi.org/10.6959/RBTDAIS.199012.0141

摘要

本研究已選出在田間防治十字花科蔬菜黑腐病效果顯著的藥劑－Bacbicure 3811及氫氧化銅，其中Bacbicure 3811之防治效果極為突出，當不施藥對照區之罹病度達75.3%時，施用30% Bacbicure 3811 WP 500倍之處理區罹病度僅8.4%，當對照區罹病度達95.6%時，處理區僅11.9%，該藥劑經稀釋2,000倍後，田間防治效果仍顯著，不過，Bacbicure 3811在生體外（in vitro）對黑腐病菌之生長並無抑制作用。在甘藍植株上使用該藥劑1,000倍液後六天內，預防黑腐病菌感染之效果達100%，15天後仍有45.5%之預防效果。但一旦病徵顯現後，該藥劑即無法抑制病斑之擴展。於田間使用該藥劑防治黑腐病時，以每7－10天施用一次，連續三次最合理。

關鍵字

十字花科蔬菜黑腐病 ； 化學防治

並列摘要

Two chemicals, 30% Bacbicure 3811 WP and 77% Kocide WP were found to be effective, especially Bacbicure 3811, on the control of crucifer black rot caused by Xanthomonas campestris pv. campestris under field conditions. After two and three applications of Bacbicure 3811 at the rate of 2g/l, the average disease incidence of treated plots were just 8.4% and 11.9%, much lower than those of untreated control, 75.3% and 95.6%, respectively. When applied at the rate of 0.5g/l, Bacbicure 3811 was still significantly effective on the control of crucifer black rot. Whereas, it was not inhibitory to the in vitro growth of X. campestris pv. campestris. Bacbicure 3811 was found to be rather preventive than curative for the control of black rot. Being sprayed with Bacbicure 3811, with control rate of 100%, the cabbages were completely free from the infection of X. campestris pv. campestris within 6 days . Fifteen days after spraying, Bacbicure 3811 still had control rate of 45.5% against the infection of the pathogen. Whereas, it failed to inhibit the development of lesion incited by the pathogen before spraying. The most appropriate duration of spraying Bacbiure 3811 for disease control was found to be 7-10 days, lasting for 3 successive times.

並列關鍵字

Xanthomonas campestris ； chemical control