• Korean Journal of Organic Agriculture
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• v.24 no.1
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• pp.123-130
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• 2016

The mortality was tested to organic control materials to the E. maslovskii adults by the dipping method in laboratory. As the result, in 2014, the extracts of Neem I was not shown control effect by 10.2% control efficacy to E. maslovskii adults in laboratory. The extract of Sophora flavescens roots was shown 84.7% mortality. And other 5 materials were shown 100% insecticidal activity to the adults in laboratory. I n 2015, Plant extract+pyrolignous acid Matrine 0.45% and Plant extract Matrine 0.5+paraffin oil 8% were shown 100% and 94.6% control efficacy, respectively. In the Japanese apricot orchards, the fruit damage rate was low on spray at 21th April in Daap, Gwangyang city, and 8th May Hwangjeon, Suncheon city in Jeonnam province in 2014. The fruit damage rate differed from spray timing and materials, but it was considered that the control of E. maslovskii should be in late April to early May. Otherwise, in 2015, the fruit damage was significantly low in late April spray in Daap, but no significant was in between one spray at 21th, 27th April and 2 spray that days. Meanwhile, the control effect was better 2 times spray of the days in Hwangjeon, Suncheon city in Jeonnam province. Therefore, in organic Japanese apricot, the use of insecticidal materials recommended to control over twice spay in from meddle to late April.

• Proceedings of the Korean Society of Organic Agriculture Conference
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• 2009.12a
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• pp.320-321
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• 2009

• Korean Journal of Organic Agriculture
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• v.24 no.4
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• pp.919-929
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• 2016

This study investigated the effect of organic materials (Bordeaux, Loess-sulfur) and the removal of apical shoot against downy mildew disease on cucumber cultivated in greenhouse. Five kinds of Bordeaux were made by adjusting mixing ratio of lime and copper sulfate in order to elucidate the optimal combination. The 4-6type Bordeaux was selected as the most effective combination for controlling cucumber downy mildew. Loess-sulfur showed inhibitory activity against cucumber downey mildew, but it was less effective than Bordeaux. It was confirmed that apical shoot cutting could reduce the incidence of cucumber downy mildew disease by 56.3%. When apical shoots of susceptible cucumber variety were cut at different leaf stages, disease incidence by early apical shoot cutting treatment was lower than that of late apical shoot cutting treatment. However in a resistant variety, 'Heukryungsamcheok', disease incidences of all cucumber apical shoot cutting treatments were lower than that of non-cutting treatment, but there was no differences between apical shoot cutting treatments due to low disease incidences. In addition, when organic materials and apical shoot cutting treatment were carried out in parallel, the combined treatments of organic materials and apical shoot cutting showed low disease incidence of cucumber downy mildew compared to untreated control. The lowest disease incidence of cucumber downy mildew was recorded in the combined treatment of 4-6type Bordeaux and apical shoot cutting. This study confirmed that apical shoot cutting can reduce the disease incidence of cucumber downy mildew and the combined treatment of apical shoot cutting and organic materials showed higher suppressive effect against cucumber downy mildew.

• Korean Journal of Organic Agriculture
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• v.25 no.2
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• pp.419-429
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• 2017

We investigated the occurrence pattern of diseases and insect pests and disease control efficacy of organic materials against watermelon powdery mildew in small type watermelon in Eumseong, Chungcheongbuk-do, 2015. The result of this study, the small type watermelon was damaged by diseases and pests such as Didymella bryoniae, Podosphaera xanthii, Aphis gossypii, Tetranychus urticae, thrips, Spodoptera exigua and Spodoptera litura. Among them, the occurrence of P. xanthii, T. urticae and thrips was high. Diseased leaf rate by P. xanthii, a casual agent of powdery mildew, was 27~99.3% in three small type watermelon cultivars in the middle of June. The number of T. urticae per leaf was high from 79.9 to 111 in three small type watermelon cultivars in the middle of June. It showed high number of thrips captured by yellow and blue sticky trap. Highest numbers of yellow sticky trap (407) and of blue sticky trap (774) were detected in the middle and first of June, respectively. The disease control efficacy of mayonnaise, oleic acid and three organic materials against powdery mildew of small type watermelon in fields was evaluated. As thre results, the symptoms of plant disease were effectively reduced by over 60% in the treatments of materials such as sodium bicarbonate 80%, mayonnaise and the extract of Rheum palmatum 1%. The highest control efficacy was 83% in the treatment of sodium bicarbonate 80%. From this study, we had a information of the occurrence pattern of diseases and insect pests in small type watermelon and the treatment of material containing sodium bicarbonate 80% was very effective for controlling against powdery mildew.

• The Korean Journal of Pesticide Science
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• v.19 no.4
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• pp.428-439
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• 2015

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.

• THE HEALTH and ORGANIC FARMING
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• no.231
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• pp.1-12
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• 2006

제28회 한국유기농업대회 준비돌입/환경호르몬으로부터 자유로워질수 있는 길/우리의 산야초/연속 강우에 따른 과일나무 잎의 갈변에 대하여/벼 멀칭재배의 이론과 기술/김제지평선축제, 성공적으로 개최돼/신태인 유기농 포도축제 성료/질병 예방을 위한 식사/일본,고령화와 웰빙 붐으로 건강식품시장 '폭발'/스위스,유기농가 급속 확산/LA,'건강빵'경쟁 후끈~후끈/일본,학교급식용 중국산 냉동가지 풋콩에서 잔류농약 검출/두가지 비료로 유기농작물의 고품질 다수확 생산을 체계적으로 보다 쉽게 하는 방법/전남도, 전국 최초 '친환경축산 5개년 종합계획'수립/배추 노균병 어떤 병인가?/고추.방울토마토 증수/중국 박람회 및 유기농장 연수기/"유기가공식품" 인증 법제화 추진/국내외 친환경 농축산물의 생산 및 인증 실태/친환경 유기낙농의 정착 방안/9월중 새식구 명단/농촌진흥청,토양전자지도,휴대폰 영농정보 제공/친환경인증기관협의회 출범/친환경농자재'목록공시제'시행/충주시,친환경바이오농업 확대 추진/제주,친환경농업 발전전략 심포지엄 개최/유기 및 일반 농산물의 품질 비교에 관한 연구/유기질 비료의 이해

• Life and Agrochemicals
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• v.28 no.10 s.233
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• pp.42-44
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• 2007

• Life and Agrochemicals
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• v.28 no.9 s.232
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• pp.24-26
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• 2007

• Life and Agrochemicals
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• v.28 no.8 s.231
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• pp.42-44
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• 2007

• Life and Agrochemicals
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• v.29 no.1 s.234
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• pp.52-53
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• 2008