New Zealand Plant Protection 54 (2001): 42-46
Preventative treatments for control of fungus gnats and shore flies
C.W. van Epenhuijsen, B.B.C Page and J.P. Koolaard
ABSTRACT
Preventative treatments for control of fungus gnats (Bradysia sp. nr. paupera, Diptera: Sciaridae) and shore flies (Scatella tonnoiri Hendel, Diptera: Ephydridae) were carried out by drenching potted tobacco plants with diflubenzuron and Bacillus thuringiensis var. israelensis (Bti). The treatments were applied at different rates and times and compared with the use of sand and sawdust toppings to cover the potting mix. Diflubenzuron treatments applied at three and nine weekly intervals and Bti applied at weekly intervals gave the lowest numbers of fungus gnats. The sand topping for the control of shore flies gave significantly better results than the untreated control.
Keywords: Bradysia, Bti, diflubenzuron, fungus gnat, Scatella, shore fly.
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