Q & A

Welcome to the Planet Natural Garden Forum! Whether you’re new to gardening or have been at it for some time, here you can search existing messages for answers to your questions or post a new message for others to reply to. If this is your first visit, please read over our forum instructions carefully before posting. Enjoy!

  • When to apply Semaspore?

    Created by Michael Davie on March 17, 2016 at 8:06 am

    I got the 5lb semaspore bait last year and applied it multiple times over the course of a couple of weeks last spring like you guys had recommended, in the right weather, right time of day, etc. I got no noticeable control on the grasshoppers. They are back this year already, about 1/8 to 1/4 inch long, just came out in the last week. Should I try again, do it now, or wait until they’re a little bigger? Their mature size is about 1 1/2 inch, possibly differential grasshoppers? I’m trying to find a photo from last year but can’t right now…

  • Author
    Posts
  • March 18, 2016 at 6:00 am #191326

    Eric Vinje
    Keymaster

    Michael –

    Watch the young grasshoppers closely. Many growers have commented that the nymphs “just disappeared” the following year after application of Semaspore Bait — the infection does carry over from year to year in the egg pods. Another approach, especially when infestations are high, is to make smaller, more frequent applications of the bait. It’s a numbers game… the more you can get to eat the bait the better your results will be.

    Applications made to younger grasshoppers will result in increased mortality with less carry-over to future hatches. Applications to older grasshoppers will result in less mortality but a greater carry-over into the next season. We recommend applications be made when grasshoppers are in their 3rd instar — about 1/4 in. long — to maximize both reduced numbers (50%) and spread of the infection to additional hatches.

    https://www.planetnatural.com/pest-problem-solver/lawn-pests/grasshopper-control/
    https://www.planetnatural.com/grasshopper-bait/

    Hope this helps!

  • Author
    Posts

You must be logged in to reply to this topic.