September 20, 2018
Home < Coffee Berry Borer < Integrated Pest Management for 2014


  1. What can be said about foliar fertilizer mixed with fungus in a mist sprayer back pack? Is it cost effective? Is there more waste using a foliar fertilizer then with a ground fertilizer? Does it replace ground fertilization or in addition to? Has anybody tabulated results yet?

  2. First off, Mist blowers are great for foliars.

    It is my understanding that foliars tend to be considered “supplemental” nutrition as the trees typically need more N than can be provided through spray. The benefit is that it is relatively inexpensive and the tree absorbs it quickly, so if you need a quick jolt of N (or other nutrients) in a dry spell, then a foliar works. But it doesn’t replace ground fertilization over the year.

    One of the liquid foliars approved for mixing with Botanigard is about $15 per acre in material costs. Relatively cheap, and worth considering if you are spraying anyway. Watch the application rate as overspraying can cause leaf burn (there’s a fair comfort zone in the mix though, as we haven’t had any burn yet).

    I don’t believe CTAHR has any data on foliars in coffee. Would love to see that research updated as we are certainly moving to a foliar spraying cycle thanks to CBB.

    There is some general data on foliar feeding that indicates late afternoon or early morning spraying is better because the plant is “intaking” and the stomata are open. Nitrogen is also sun-sensitive and may burn off on a hot day. That doesn’t necessarily mean a mid-day spray is useless but I am not sure on true effectiveness. The tree does have a mixed amount of natural shade because of the leaf overlap so not all will be lost (just as with the fungus).

    That’s what I know. Next time you are in CTAHR, ask them if they would be willing to add Foliar Ferts to their research list.

  3. How can we do this in Kona? – a self-organized pest control emerging from ecological interactions – a very intriguing research and article by University of Minnesota biologist Rob Wallace.


    • too bad it is white print on a black background. hard to read, but maybe Suzanne Shriner could comment

    • I think that is the ideal for any pest control. The reality is that even in CBB’s native home, there is no balanced ecological control that is considered economically sustainable for farmers. For a virulent invasive such as CBB, we are far from a point where we can just let “nature work it out”. Probably not ever a reality here in Hawaii, because we would have to import many biological predators (wasps etc) that would cause a cascading impact on other native insects/plants. There are a number of scientists in Africa and Colombia working on predators but they still don’t have an answer.

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