Laboratory and field evaluations of entomopathogenic Lecanicillium attenuatum CNU-23 for control of green peach aphid (Myzus persicae).
An entomopathogenic fungus was isolated from an infected aphid. The isolate conformed most closely to Lecanicillium attenuatum CBS 402.78 (AJ292434) based on the internal transcribed spacer (ITS) region of its 18S rDNA, and thus was designated L. attenuatum CNU-23. Laboratory and field evaluations of CNU-23 blastospores were carried out for the control of green peach aphids. The laboratory evaluations of CNU-23 revealed an aphid mortality of about 80% with an estimated LT50 of 3.72 days after the application of CNU-23 at 1x106 blastospores/ ml. Meanwhile, the field evaluations of CNU-23 performed on greenhouse pepper plants during the rainy season showed an aphid mortality ranging from 72% to 97%. Significant sporulation was observed in the aphids treated with CNU-23. Therefore, the results suggest that L. attenuatum CNU-23 can be used as a biocontrol agent for green peach aphids on greenhouse pepper plants.
Kim
Hyang Yeon
HY
Division of Applied Bioscience and Biotechnology, Institute of Agricultural Science and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 500-757, Korea.
Lee
Hyang Burm
HB
Kim
Young Cheol
YC
Kim
In Seon
IS
D000818:Animals; D001042:Aphids / Q000382:microbiology*; D002212:Capsicum / Q000382:microbiology; D021901:DNA, Intergenic / Q000235:genetics; D006999:Hypocreales / Q000166:cytology / Q000235:genetics* / Q000302:isolation & purification / Q000472:pathogenicity*; D010572:Pest Control, Biological / Q000379:methods*; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics
D021901:DNA, Intergenic; D012337:RNA, Ribosomal, 18S