유황훈증처리법 개발에 의한 장미흰가루병 생력적 방제 연구 = Labour-Saving Control Method of Rose Powdery Mildew(Sphaerotheca pannosa) with Sulphur Fumigation

다국어 초록 (Multilingual Abstract)

Studies were conducted to investigate the labour-saving control method of rose powdery mildew(Sphaerotheca pannosa) with sulphur fumigation in korea. The results are abstracted as follows.
Sulphur produces SO_2 while burning and causes plant injury. However, if the sulphur is vapourized by solution status without burning, sulphur forms thin films on the surface of leaves or stems of roses. Thus, mycelia and oidia of rose powdery mildew can be controlled by this mechanism. Apparatus is tin cylinder container with 40 cm in diameter by 17 cm in height. The electric wires are installed at 2 cm high from container bottom. Temperature regulator (Keeping temperature 130-60℃) and timer are also installed. Place 2 kg of sulphur powder in container and heat to vapourize sulphur. Sulphur powder should be always over 1/3 to prevent burning.
The bioassay apparatus was operated in the closed greenhouse at night for 4-5 hours for 5 days. One fumigation apparatus was enough for 990㎡. The 100% of rose powdery mildew was controlled. Superficial plant injury was not observed on roses at the rate of standard and double amount. One Fumigation apparatus was installed in the 990㎡. The 100% of rose powdery mildew was controlled. Superficial plant injury was not observed on roses at the rate of standard and double amount. One fumigation apparatus was installed in the 990㎡ of greenhouse were roses were cultivating. Observations were made from February to October. Sulphur fumigation method resulted in 99-100% of pest control by four times compared with 50-70% in farmers' routine method by eight times. The saving effect of control expenses were saved by 80% and no plant injuries were observed.