Page 17 - Griffin Gazette Q4 2017
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pharmaceutical tobacco. Release rates  for use in propagation and young plant
        start at 5-10 per 100 square feet.   stages. Use mini sachets on hooks or sticks
        Fungus gnats – Fungus gnats are     at a rate of 20 per 100 square feet.
        problematic in both greenhouses and  Whiteflies – Whiteflies are most problematic
        warehouses, impacting all crops. Prevention  in solanaceous crops, including tomatoes,
        depends on the media used in production.  and cucumbers. Unlike other pests, BCA
        For  universal prevention  regardless  of  control of whiteflies generally starts at first
        media used, turn to the predatory beetle  sign of the pest instead of on a preventative
        Dalotia coriaria (formerly known as Atheta  basis. Control relies on parasitoid wasps,
        coriaria) and the predatory mite Hypoaspis  including  Eretmocerus eremicus and
        miles. Both are released once, early in the  Encarsia formosa,  and  requires  an  active
        crop, and will establish in the production  scouting program to assess pest and BCA
        space. Dalotia can be also be sustained in  populations at different leaf clusters on the
        breeding boxes, long lasting colonies that  crop. Contact GGSPro to learn more about   Sachets provide great protection in
        are easily supported (request GGSPro’s  whitefly control with BCAs.      medicinal marijuana
        bulletin  to learn  more). Release  Dalotia at   Effective, preventative control of insect and
        a rate of 25-50 per 100 square feet and   mite pests can be achieved with BCAs in all
        Hypoaspis at a rate of 1000-3000 per 100   CEA crops. Success simply requires a solid
        square feet.                        plan and a commitment to early release to
        Spider mites – Spider mites are the  build the protective shield. Griffin can help
        scourge of a number of CEA crops,  you make this happen, with personalized
        including strawberries, medicinal marijuana,  BCA plans and continued support from
        cucumbers,  peppers  and  tomatoes.  our GGSPro team. Talk to your Griffin sales
        Prevention is worth its weight in gold and  representative to get started!
        can be achieved with several species of   See the Bonus content in the digital version
        predatory  mites,  including  Amblyseius   of the Gazette for additional details on
        andersoni, Neoseiulus californicus (formerly   product use for the BCAs mentioned above.
        A. californicus) and  N. fallacis. Choose
        andersoni or  fallacis for cooler conditions
        and californicus for warmer conditions. For                              Amblyseius cucumeris – predatory mites that
        tomato  and  medicinal  marijuana,  the  best                            feed on thrips
        choice  is  andersoni, as  it also  provides   What is
        protection against russet mites, which
        are extremely difficult to control once
        established in a crop. The most efficient   controlled
        means of providing preventative control is
        to use controlled release sachets, which are
        hung in the crop and replaced every four to
        six weeks (every four weeks in warehouse   environment
        applications or on medicinal marijuana).
        Andersoni and californicus are available in
        sachet form. Place sachets at 10 per 100   agriculture?
        square feet for most crops and a little more
        densely (15 per 100 square feet) for stronger
        protection in medicinal crops.  Fallacis is
        available only in bulk form, requiring weekly   Controlled environment    The tiny parasitoid Aphidius wasps keep
        releases to maintain the protective shield.                              aphids at bay
        Release fallacis at a rate of 100-150 per 100   agriculture (CEA)
        square feet.                                 encompasses
        Thrips – Thrips can attack all CEA crops,
        though they are less common on lettuces   production of edibles
        and leafy greens. Preventative control is   and medicinal crops
        best achieved with predatory mites, either
        Amblyseius cucumeris or  A. swirskii.   under cover, in structures
        Swirskii are more aggressive feeders, but   such as high tunnels,
        require  higher  temperatures,  so  their  use
        is generally limited to summer months in   greenhouses and
        greenhouses. There is one more limitation
        to consider for swirskii: The oils in tomato   warehouses.
        tissue make  swirskii less effective. Utilize
        sachets for efficient release for preventative
        programs. Stick sachets are especially nice                              Dalotia, aka Atheta – nocturnal, predatory
                                                                                 beetles feed on fungus gnat larvae

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