Control of Pepper Anthracnose Caused by Colletotrichum acutatum using Alternate Application of Agricultural Organic Materials and Iminoctadine tris + thiram

Abstract

Pepper anthracnose caused by Collectotrichum acutaum has been known as one of the most damaging diseases of pepper, which has reduced not only yield but also quality of pepper produce almost every year. This study was conducted to develop control strategy against pepper anthracnose by alternate application of agricultural organic materials and chemical fungicides. The alternate application effect of agricultural organic materials and chemical fungicides for controlling pepper anthracnose were examined in vitro and in the field. First, thirteen microbial agents and twenty two agricultural organic materials were screened for antifungal activity against C. acutatum through the dual culture method and bioassay. As a result, one microbial agent (Bacillus subtilis QST-713) and three agricultural organic materials (sulfur, bordeaux mixture, marine algae extracts) were found to show high inhibition effect against C. acutatum. In the field test, when Iminoctadine tris+thiram, a chemical fungicide for controlling pepper anthracnose, was sprayed, it reduced disease incidence by 89.5%. Meanwhile Sulfur, bordeaux mixture, copper, marine algae extracts and Bacillus subtilis QST-713 showed low disease incidence at the range of 33.1~81.0%. However, when Iminoctadine tris+thiram and agricultural organic materials(bordeaux mixture, marine algae extracts) were applied to pepper fruits alternately two times at 7 days interval, there was a 81.7 and 87.1% reduction in disease, respectively. Consequently, the alternate spray of chemical fungicide (Iminoctadine tris+thiram) and agricultural organic materials (bordeaux mixture, marine algae extracts) could be recommended as a control method to reduce the using amount of chemical fungicide.

Identification and Characterization of Bacillus tequilensis GYUN-300: An Antagonistic Bacterium Against Red Pepper Anthracnose Caused by Colletotrichum acutatum in Korea

“…To meet the demands of a growing population, an increased production of red pepper along with other vegetables are required in Korea. Therefore, a large quantity of chemical pesticides is utilized annually to control various bacterial, fungal, and viral diseases on red pepper crops in Korea ( Hong et al, 2015 ). Among all pathogens that cause diseases in red peppers, anthracnose caused by a wide range of Colletotrichum species results in serious losses of fruits during the pre- and post-harvest stages ( Ali et al, 2016 ), while occasionally damaging the stem and foliage ( Mishra et al, 2018 ; Mongkolporn and Taylor, 2018 ).…”

Current Status of Lime Bordeaux Mixture Research using Properties of Lime based Minerals

“…작물 대상으로는 일부 소석회를 사용하고 있으나, 주로 생석회를 활용하여 농업 분야에 사용하고 있으며 유효성 분이 병원균의 생리기능을 파괴하여 병원균이 작물체내 에 침입하는 것을 방지하는 특성을 활용하고 있다 [16][17][18][19][20][21][22][23][24][25][26][27][28] . 동 물계에서는 아프리카 돼지열병, 구제역 및 조류독감 등 가축 전염병이 발생했을 때 생석회를 사용하여 농장방역 에 사용하고 있다 7,8) .…”

“…최근 친환경 유기농산물에 대한 소비자 의 관심이 높아져, 농약잔류가 없는 친환경 작물을 생산 하고자 하는 농가들이 늘어남에 따라 석회보르도액을 활 용한 연구가 많아지고 있으나, 대부분 제품으로 판매하고 있는 석회보르도액을 활용한 작물 적용 연구가 주로 진행 되었으며 , 석회보르도액의 주요 원료로 사용하는 생 석회, 소석회, 황산구리의 광물학적 특성에 따른 항균 특 성에 관한 연구는 매우 부족한 실정이다 35) . [18][19][20][21][22][23][24][25][26][27][28]34,35) 16,17) . 21,25,34) [18][19][20][21][22][23][24][25][26][27][28] .…”