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 หัวเรื่อง:ประสิทธิภาพของ EM ที่มีต่อไรแดงแอฟริกัน Eutetranychus africanus (Tucker) ไรสนิมส้ม Phyllocoptruta oleivora (Ashamead) และไรเหลืองส้ม Eotetranychus cendanai (Rimando) ผู้เขียน: มานิตา คงชื่นสิน, Tewin Kulpiyawat สื่อสิ่งพิมพ์:pdf AbstractThe effect of EM 5 on African red mite, Eutetranychus africanus (Tucker) Citrus rust mite, Phyllocoptruta oleivora (Ashamead) and Citrus yellow mite, Eotetranychus cendanai (Rimando) were examined in the laboratory of Entomology and Zoology Division. This study was made to determine the possibility of developing some effective microorganisms to control the important citrus mites. The EM 5 mixture including30% ethyl alcohol, acetic acid and molasses were diluted with water into 5 concentrations : 100, 75. 50, 25 and 12.5%. The pure mixture excluded EM and a recommended acaricide, propargite 0.045% were included to test the toxicity on these as well. All treatments were evaluated by use of the leaf disc-dip technique. The residual actions on mite mortality were determined 24, 48, 72 and 96 hours after treated. Excluded the errors of this experiment, the result would conducted on 48 hours after treated, The mite mortality treated with propargite 0.045% was one hundred percentage which was non significantly different from mixture plus EM 100% and mixture without EM 100%. Because the 100% mixture with and without EM gave the some effect on mite mortality, the result was concluded that the toxicity to mite was not caused by EM. They might be killed due to the compounds in mixture, such as acetic acid, ethyl alcohol or due to the very high sticky of molasses. |
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