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Studies on the relationship of disease severity of yield and yield loss of rice sheath blight disease
Authors
W.H. Tsai
蔡武雄
Publication date
27 April 2015
Publisher
台灣:植病保護學會
Abstract
水稻臺南5號及臺中在來1號因紋枯病為害之產量及產量捐失分為發病程度A.B.C及D四級,A為接種後不施藥,使病斑達到劍葉,B為接種後病斑選第四葉鞘(由下向上算)時,即以殺菌幫噴射,C為接後病斑達第二葉鞘時,即以殺菌劑噴射,D為對照區,不接種,且以殺菌劑噴射。臺南5號在第一期作A.B.C及D處理下,其產量每公頃各4000.0, 5466.7, 6433.3及7033.3公斤,其相對損失為43.0, 22.3, 9.0及0%,第二期作A.B.C及D處理下,其產量每公頃各為3866.7, 4746.7, 5093.3及5680.0公斤,其相對損失為31.9, 16.3, 10.1及0%。臺中在來1號在第一期作A.B.C及D處理下,其產量各為4400.0, 4500.0, 6033.3及6566.7公斤,其相對損失為32.9, 27.5, 8.5及0%,第二期作A.B.C及D處理下,其產量每公頃各為5111.1, 6153.8, 6478.6及6931.6公斤,相對損失為26.2, 11.3, 6.6及0%。臺南5號之被害度與產量之相關關係,第一期作Y=6984.54-33.46X (r=-0.9967),第二期作Y=5751.93-21.28X (r=-0.9943),臺中在來1號之被害度與產量之相關關係,第一期作Y=7001.33-25.39X (r=-0.9538),第二期作為Y=7030.18-19.39X (r=-0.9 916)
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Last time updated on 17/05/2020