Perhaps the sending address I used this morning was wrong. I am trying another now.
Begin forwarded message: > From: David Kollas <kol...@sbcglobal.net> > Date: July 31, 2013 9:08:52 AM EDT > To: Apple-crop discussion list <apple-crop@virtualorchard.net> > Bcc: Kollas David <kol...@sbcglobal.net> > Subject: Residual pesticide activity > > All: > Surely others know the answer to this question. I must have missed it > somewhere. Does the systemic activity of > absorbed neonicotinoid sprays Assail and Calypso replace the surface residual > that continues to kill Apple Maggot flies > entering an Imidan or Guthion-treated orchard days after the application? Do > the neonics provide residual control only by > systemic tissue-presence which the insect must consume? Or do Apple Maggot > flies get enough active ingredient through > their "feet" to kill them on days-old neonic treatments? > The question is relevant in choosing whether, and what pesticide to > apply prior to forecast thunderstorms that can > remove surface residues. > > David Kollas > Kollas Orchard, Tolland, CT
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