• Korean Journal of Weed Science
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• v.31 no.1
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• pp.8-23
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• 2011

Weeds are one of the major constraints to crop production in organic farming systems. This paper reviews major results and techniques achieved with physical, cultural, and biological weed control and their perspectives in organic agriculture. Physical methods includes mechanical, thermal, lighting, electrocution, pneumatic, autonomous robot weeding control techniques. Cultural weed control methods includes mulching, tillage, crop rotation, cover crops and crop competition. Physical and cultural weed control techniques are especially important in organic farming crops where other weed control options are limited or not available without use of herbicides. Biological weed control includes mycoherbicides, innundative biological control, broad-spectrum biological control and allelopathy. Successful weed management in organic farming requires well managed integrated systems of mechanical control using newly developed machines, cultural control and biological control methods. Weed management decision-aid models may also needed to develop to provide greater assurance of achieving profitability and appropriate long-term weed management in organic farming in the future.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.7 no.3
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• pp.81-91
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• 1986

진딧물은 아주 작고 연약하여 조그마한 힘을 가해도 곧 터져버릴 것 같은 곤충이지만, 일생을 통하여 5가지 형태로 까지 변화할 수 있어 불량환경에 적응할 수 있는 힘은 그 어느 곤충보다도 크다고 하겠다. 처녀생식으로 번식하므로 번식력 또한 대단하여 그 숫자가 단시일내에 크게 불어나는 해충이다. 과수 재배시에 진딧물의 피해양상은 과수의 영양분을 흡즙하고, 감로를 분비하여 그을음병을 유발시키며, 잎을 오그라뜨리거나 뒤쪽으로 말리게하여 잎의 기능을 억제시킴으로써 과수의 생육을 지연시키고 묘목의 경우에 심할 때는 고사(枯死)까지 한다. 또한 최근에는 약제방제시에 약제선택성이 강한 종들이 나타나고 있는 실정이므로 진딧물의 효과적인 방제를 위해서는 무엇보다도 먼저 진딧물의 종류에 따른 생태를 잘 알고 그에 따른 합리적인 방제대책을 수립하여야 할 것으로 생각된다. 이에 필자는 그동안의 연구에서 얻어진 결과를 토대로 과수가해 주요 진딧물의 생태와 방제법을 소개하는 것이며 이 조그마한 자료가 진딧물에 얽힌 문제점들을 해결하는데 조금이나마 도움이 되었으면 한다.

• Korean journal of applied entomology
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• v.62 no.3
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• pp.193-205
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• 2023

Botanical insecticides derived from plant extracts exhibit repellent, antifeedant and enzyme-inhibiting activities against insect pests. Among such pests, phytophagous mites are major threats to horticultural crops. Botanical extracts derived from neem, chrysanthemum, and shrubby sophora are employed as field acaricides. These botanical extracts have low toxicities against natural enemies of the insect pests and, thus, are valuable in pest management. This review focuses on the potential for botanical extracts in the controls of mites, with comparisons of the spectrum of activity, the lethal dose and times and their mode of action. This information will enable better formulation of botanical extracts in integrated mite control.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.9 no.6
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• pp.14-18
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• 1988

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.7 no.4
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• pp.97-109
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• 1986

우리나라의 주곡생산은 다수확 신품종의 보급과 재배기술의 발전으로 어느정도 안정상태에 이르고 있다. 그러나 병해충의 발생과 기상재해는 식량자급에 가장 큰 문제점이 되고 있다. 따라서 미곡생산을 안정시키고 지속적인 다수확을 이루기 위해서는 병해충에 대한 저항성 품종의 육성과 아울러 병충해의 적절한 종합방제 체계의 확립이 선행되어야 하겠다.

• Korean journal of applied entomology
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• v.34 no.1
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• pp.75-81
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• 1995

To reduce crop damage from root-knot nematode, Meloidogyne spp. chemical, cultural, physical control methods were compared in commercial greenhouse for 3 years from 1992 to 1994. Timing of sol exchange for economic losses due to the nematodes is important: every 3 years for coarse sand (Masatto) and every 4 years for red-yellow soil. Control effects on Meloidogyne spp. in cucumber were 78.2% in Dazomet DP, 72.1% Carbo G+Soil reverse+submergence, and 66.3% in Carbo G+submergence. Pesticide effects were temporally different after treatment: 77.7~80.6% in 20 days and 33.7~49.5% in 60 days. Cropping system in oriental melon gave an excellent control effect of 81.1% at oriental melon/rice culture. All methods controled root-knot nematodes at the time of the treatment but the number of the nematodes increased at the end of the season. However, soil exchange was effective for 3 years. The most economic control practice is rotation with rice for every three years.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.5 no.2
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• pp.83-89
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• 1984

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.5 no.3
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• pp.90-95
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• 1984

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.5 no.4
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• pp.77-80
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• 1984

• Korean journal of applied entomology
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• v.61 no.4
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• pp.519-528
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• 2022

The western flower thrips, Frankliniella occidentalis, infests the hot pepper cultivated in greenhouses and has been considered to be controlled by a natural enemy, Orius laevigatus. However, sporadic outbreaks of the thrips due to fast population growth occasionally need chemical insecticide treatments. This study was designed to develop an optimal integrated pest management (IPM) by using selective insecticides along with a safe re-introduction technique of the natural enemy after the chemical insecticide treatment. First, chemical insecticides were screened to select the high toxic commercial products against F. occidentalis. Five insecticides containing active components (pyriproxyfen+spinetoram, abamectin, spinosad, acetamiprid, and chlorpyrifos) were selected among 17 commercial products. These five selected insecticides gave different toxic properties to the natural enemy, O. laevigatus. Especially, abamectin and spinetoram gave relatively low toxicity to the natural enemy compared to organophosphate or neonicotinoid. Furthermore, the five selected insecticides were assessed in their residual toxicities against O. laevigatus. Organophosphate and neonicotinoid insecticides showed relatively longer residual toxicity compared to abamectin and spinosads. Indeed, abamectin or spinetoram did not give any significant toxicity to O. laevigatus after 3 days post-treatment. These residual effects were further supported by the assessment of the chemical residue analysis of the insecticides using LC-MS/MS. These results suggest an IPM technology: (1) chemical treatment of abamectin or spinetoram against sporadic outbreaks of F. occidentalis infesting hot pepper and (2) re-introduction of O. laevigatus to the crops after 3 days post-treatment to depress the equilibrium density below an economic injury level.