Page 22 - Griffin Gazette Issue 3 - 2018
P. 22


                                      Dinner is served!

                                                                 Fungus gnat larvae skelotnizing dahlia leaf tissue in contact with the soil

                          By Rick Yates,    benefit  of greenhouse growers. Their   aggressive feeders. The adult stage is
                          GGSPro Technical   menu includes the pupal stage of thrips,   winged to aid in disbursement. They
                          Services Manager  fungus  gnat  and  shorefly  larvae  and   use a keen sense of smell to track down
                                            other soil-dwelling insects. They also   their food sources. They are tolerant of a
                          The rove beetle,
                          known  as  Atheta   feed on fungus gnat eggs, with adults   wide range of temperatures. They have
                          coriaria and more   shown to eat over 100 per day! They are   been shown to survive down to 39° F,
                          recently   Dalotia   nocturnal, so they do most of their work   but consider the low 50s to be the low
                          coriaria, says, “Call   under the cover of darkness. The larval   end of the effective range. This makes
                          me whatever you   stages are white to yellow or orange,   them effective at lower temperatures
                          want, just don’t call   but the adult stages are shiny and dark   than the predator mite,  Stratiolaelaps
         me late for dinner!” These tiny predator   brown. The adults are quite small, less   (Hypoaspis) miles, that is often used in
         beetles  are  voracious  feeders  that use   than 1/8-inch in length. All life stages   concert with rove beetles to control the
         their appetite for soil-borne pests to the   of the rove beetles are very mobile,   same pests.

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