earticle

영어

Most Jeju citrus orchards use a dense planting method in which trees are planted densely to pursue high productivity and yield. However, since this method is difficult to mechanize and automate pest control, the dependence on manual work increases. Fruit crops require frequent pesticide spraying due to the high incidence of pests, but this intensive cultivation method adds to the inconvenience of agricultural work and increases worker exposure during pesticide spraying. It also reduces the light absorption area and reduces crop and fruit quality. In this study, various experiments were conducted by applying a small unmanned high-speed spreader along with fruit tree pruning in a densely planted orchard environment. The pesticide spraying amount and spraying time were compared with manual control to evaluate the pesticide spraying effect and efficiency at the farm level. In the existing control group, the pesticide attachment rate was the highest when using a small unmanned speed spreader on a 1.5m wide road built in a 2.7m x 2.7m dense orchard, and the external attachment rate was 97.1%, the internal adhesion rate was the highest at 93.5%. The pesticide spraying time of the small unmanned high-speed spreader was 13 seconds per tree and the amount of pesticide was 6 L per tree, whereas the conventional manual control spraying time was 21 seconds per tree and the amount of pesticide was 7.6 L per tree. Therefore, when using an unmanned high-speed spreader by pruning a 1.5m path in a dense orchard, the time for spraying chemicals is reduced by 38.09% and the amount of insecticide sprayed by 21.05%, which is an effective insecticide spraying method.

한국어

본 연구에서는 2.7m×2.7m 의 밀식재배 과 원에서 기계톱과 전정가위로 축벌하는 방식으 로 1m, 1.5m 통로를 만들어 무인 소형 SS기 를 이용한 방제와 밀식과원 상태에서 관행방제 를 비교 실험하였다. 방제시간은 무인 소형 SS 기 방제 시 13초/주 소요되었으며, 밀식과원 상태에서 관행방제 시 소요시간은 21초/주로 관행방제 대비 소형 무인SS기 방제 시 약액 살포시간이 38.09% 짧았다. 약제 살포량은 무인 소형SS기 6 L/주, 관행방제 7.6L/주 소요 되어 관행방제 대비 무인소형 SS 방제 시 약 액 살포량 21.05% 낮았다. 감수지를 이용한 내·외부 약액부착율 실험결과 밀식과원 상태 에서 축벌로 1.5m 통로를 만들어 소형 무인 SS기를 적용하였을 때 약액부착율 수관외부 97.1%, 수관내부93.5%로 방제 효과가 가장 뛰어난 것으로 나타났다. 검은점무늬병 발병도 를 조사한 결과 소형 무인SS기 방제군 1.6%, 관행 방제군 3%로 관행방제대비 소형 무인SS 기 방제 시 검은점 무늬병 발병도가 1.4% 낮은 것으로 나타났으며, 병든과율은 0%로 같았다.