Abstract
During 1984, isofenphos 1.5 and 5% granular and 2 flowable (2.24 kg [AI]/ha) applied 11 April to golf course turfgrass in Canal Fulton, Ohio, resulted in 92% average reduction of overwintered Japanese beetle, Popillia japonica Newman, larvae 48 dafter application. Of treatments applied April through August, only August applications significantly reduced summer larvae. Analysis by gas/liquid chromatography for isofenphos and oxyisofenphos residues in samples taken 6 August from the April, May, June, and July treatments showed that 79, 92, 94, and 97%isofenphos, respectively, remained in the thatch. Mean oxyisofenphos residues at this time were 54, 45, 54, and 63%, respectively, of total residue. Oxyisofenphos residues 5–6 d after the 11 April and 14 August applications were 7 and 15%, respectively, of the total. Immediate posttreatment irrigation, plus regular subsequent irrigation and rainfall, did not improve isofenphos penetration into the soil or enhance larva control.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
