• Title/Summary/Keyword: Crop yields

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Effects of Fungicide Control of Downy Mildew (Pseudoperonospora cubensis) on Yield and Disease Management of Ridge Gourd (Luffa acutangula)

  • Deadman, M.L.;Kagadi, S.R.;Pawar, D.R.;Gadre, U.A.
    • The Plant Pathology Journal
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    • v.18 no.3
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    • pp.147-151
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    • 2002
  • Seven fungicides were compared for the control of downy mildew on midge gourd. All treatments had significantly lower rates of disease progress curves and disease severity levels than that of the control. The highest yields were obtained from crops treated with metalaxyl + mancozeb, fosetyl-Al, and chlorothalonil. These treatments also proved to be the most economical considering the treatment costs.

Analysis of Pesticide Contaminants in Food (식품 중 잔류농약의 분석)

  • 김종규
    • Journal of Environmental Health Sciences
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    • v.19 no.1
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    • pp.90-93
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    • 1993
  • Increasing Public Concern : Pesticide residue is probably one of the fastest growing problems in regard to environmental contamination. Pesticide use in agriculture in this century has produced certain benefits, including a decrease in crop waste and an increase in crop yields and food quality. However, pesticide use also creates problems of having effects on the environment and remaining in food chain. The presence of pesticide residue in food, water, and soil has aroused public concern over potential health hazards. Despite information provided by national and private level agencies suggesting that food is safe, consumer groups worldwide are demanding assurance as to the safely of agricultural products.

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Outbreak of Rice Panicle Blast in Jeonbuk Province of Korea in 2021

  • Hyunjung, Chung;Woo-Il, Lee;Soo Yeon, Choi;Nak-Jung, Choi;Sang-Min, Kim;Ju-Yeon, Yoon;Bong Choon, Lee
    • The Plant Pathology Journal
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    • v.39 no.1
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    • pp.136-140
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    • 2023
  • Rice panicle blast is one of the most serious diseases threatening stable rice production by causing severe damage to rice yields and quality. The disease is easy to occur under low air temperature and frequent heavy rainfall during the heading season of rice. In 2021, a rice panicle blast severely occurred in the Jeonbuk province of Korea. The incidence area of panicle blast accounted for 27.7% of the rice cultivation area of Jeonbuk province in 2021, which was 13.7-times higher than in 2019 and 2.6-times higher than in 2020. This study evaluated the incidence areas of rice panicle blast in each region of Jeonbuk province in 2021. The weather conditions during the heading season of rice, mainly cultivated rice cultivars, and the race diversity of the Jeonbuk isolates were also investigated. It will provide important information for the effective control of the rice panicle blast.

Nutrient Value and Yield Response of Forage Crop Cultivated in Reclaimed Tidal Land Soil Using Anaerobic Liquid Fertilizer (간척지 토양에서 혐기소화액비 시용에 따른 사료작물의 생산성과 사료가치 평가)

  • Shin, Kook-Sik;Hwang, Won-Jae;Lee, Seung-Heon;Kim, Chang-Hyun;Yoon, Young-Man
    • Korean Journal of Organic Agriculture
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    • v.20 no.4
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    • pp.669-685
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    • 2012
  • This study was carried out to investigate the nutrient value and yield response of corn, barley, and sudangrass by the application of anaerobic liquid fertilizer in two tidal land soil in order to design the resource recycling agricultural system between livestock and forage crop cultivation in a environment friendly agricultural region. Forage crop yields at reclaimed tidal soil during were at the level of 64~76% comparing with forage crop yields at upland soil in the cropping system of corn, barley, and sudangrass. And yields of forage crops were in the order of barley > corn > sudangrass in the cultivated cropping system for 2 year. Relative feed values (RFVs) of forage crops were 88%~106% for corn, 90%~111% for barley, and 91%~113% for sudangrass, and the carrying capacity of beef cattle (Hanwoo) was 5.8~8.6 head/year/ha for the corn-barley cropping system of one year, and 4.8~6.7 head/year/ha for the barley-sudangrass cropping system of one year. Also, carrying capacity of beef cattle (Hanwoo) was highest in the application level of anaerobic liquid fertilizer 200%.

The Effects of Increased Temperature on Yield Properties, Antioxidant Contents, and Pollen Viability of Adzuki Bean (Vigna angularis L.) Responses in Temperature Gradient Greenhouse and Growth Periods (온도구배온실에서 온도상승이 생육시기별 팥의 수량, 항산화 성분, 화분 임성에 미치는 영향)

  • Eun Ji Suh;Ok Jae Won;Jae-Sung Park;Won Young Han;Jin Hee Seo;Sun Tae Kim;Hye Rang Park
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.68 no.2
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    • pp.47-58
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    • 2023
  • The quality and yield of crops produced using field cultivation are expected to decrease due to the recent global climate change caused by extreme weather. The plant reproductive stage associated with crop yields is a highly vulnerable period to global warming caused by high temperatures. This study analyzed the adzuki bean's yield properties, antioxidant contents, and pollen viability of adzuki bean (Vigna angularis L.) under high-temperature stress and growth periods in a temperature gradient greenhouse that forms 0 to 4℃ above the outside temperatures. As the main variety of red beans cultivated in Korean farms, the "Arari" red bean was grown in the rain shield greenhouse and the temperature gradient greenhouse from 2021 to 2022 in Milyang, Korea. Compared to 2022, it showed a 0 - 1.0℃ lower temperature during the whole growth period in 2021. However, its average temperatures were 0 - 3.7℃ higher in the vegetative stage and 0.4 - 2.4℃ higher in the anthesis stage in 2021. The lowest yield (6.8 ± 0.7 g) was at the highest temperature (T4: low, 23.6℃; average, 28.5℃; high, 35.8℃) during the anthesis stage in 2021. The temperatures of the mature stage were 1.7 - 3.9℃, which were higher in 2022 than in 2021, although the low temperatures of 2022 were lower than in 2021. The yields of the mature stage in 2022 increased more than in 2021 because of the high temperature of the mature stage. The growth and yield were good at 40.5℃ in the vegetative stage. However, growth was poor when the average temperature was 27.0℃ or higher, and yields decreased during the flowering period. Total polyphenol and flavonoid contents were increased, and the pollen viability was 40.75% in the whole growth period at high temperature (T4: low, 22.9℃; average, 28.8℃; high, 36.9℃). These results showed that the antioxidant levels increased when the antioxidant component was affected at higher temperatures than at normal. In contrast, the pollen viability-related yield decreased as the temperature increased. Our results are the basic data for field growers and the breeding of thermos-tolerance in adzuki beans to prepare for the changeable future climate.