{"id":3528,"date":"2026-10-08T19:15:39","date_gmt":"2026-10-08T11:15:39","guid":{"rendered":"http:\/\/www.lotfitrade.com\/blog\/?p=3528"},"modified":"2026-10-08T19:15:39","modified_gmt":"2026-10-08T11:15:39","slug":"can-microbial-fungicide-be-used-in-combination-with-biological-control-agents-41ee-b44056","status":"publish","type":"post","link":"http:\/\/www.lotfitrade.com\/blog\/2026\/10\/08\/can-microbial-fungicide-be-used-in-combination-with-biological-control-agents-41ee-b44056\/","title":{"rendered":"Can microbial fungicide be used in combination with biological control agents?"},"content":{"rendered":"

If you\u2019ve been hanging around the ag industry for any length of time, you\u2019ve probably heard two buzzwords thrown around a lot these days: microbial fungicides and biological control agents (BCAs). And if you\u2019re a grower who\u2019s tired of pounding your soil with synthetic chemicals that mess with the good stuff in your dirt, you\u2019ve definitely wondered if these two can play nice together. As the head of a microbial fungicide supply company, I get this question all the time\u2014and the short answer is: yes, they can. But let\u2019s dive into why that works, what you need to watch out for, and how we make it easy for growers to pull this off without headaches. Microbial Fungicide<\/a><\/p>\n

<\/p>\n

First, let\u2019s define the basics so we\u2019re all on the same page. Microbial fungicides are living organisms (usually fungi or bacteria) that kill or suppress plant pathogens like powdery mildew, gray mold, or blight. Think of them as tiny, plant-friendly hitmen that target only the bad guys, not the beneficial microbes that keep your soil healthy. BCAs are a broader category\u2014they include those same microbial fungicides, plus other organisms like predatory mites, parasitic wasps, and even certain nematodes that fight pests (insects, mites) and diseases. The key here is that both are biological, so they\u2019re way gentler on the environment than synthetic fungicides, and they leave less residue on crops.<\/p>\n

Now, why would you even want to combine them? Because neither works perfectly alone. Let\u2019s say you have a powdery mildew outbreak on your tomatoes. A microbial fungicide might knock back 70% of the infection, but some spores will slip through. Add a BCA like a predatory mite that eats mildew spores, and suddenly you\u2019re at 95% control. Plus, using them together reduces the chance pathogens develop resistance\u2014something that\u2019s a huge problem with synthetic chemicals when they\u2019re overused. We\u2019ve seen growers lose entire crops because a pathogen adapted to a single synthetic fungicide, but mixing two different biological modes of attack makes it way harder for pathogens to evolve around the protection.<\/p>\n

But here\u2019s the thing: it\u2019s not as simple as just dumping a microbial fungicide and a BCA into your spray tank. You have to know what you\u2019re pairing. For example, some BCAs produce antibiotics that can kill the microbes in our microbial fungicides, rendering both useless. We did a trial last year with a grower in Ohio who tried mixing our Bacillus amyloliquefaciens-based fungicide with a common BCA that secretes a compound called fengycin. Turns out, the fengycin killed most of the Bacillus within 48 hours\u2014so they wasted their money and still had mildew. But when they paired our product with a Trichoderma-based BCA, which competes for space and nutrients instead of producing antibiotics, the two worked even better together than either alone. Trichoderma attaches to plant roots and forms a protective layer, while our Bacillus attacks surface pathogens\u2014perfect synergy.<\/p>\n

Another big factor is timing. Microbial fungicides and BCAs are living things, so they have specific conditions they need to survive. If you spray our microbial fungicide in direct midday sun, the UV rays will kill 90% of the microbes before they even get to the plant. Same with many BCAs\u2014predatory mites don\u2019t do well in 90-degree heat. So when combining them, you have to apply either in the early morning or late evening, when temps are cooler and UV is lower. We also recommend adding a low-rate sticker spray (something we can help you pick out) to keep both organisms from drying out on leaf surfaces. We had a grape grower in California test this last season\u2014he applied our microbial fungicide plus a Beauveria bassiana BCA at 6 a.m., and the mildew control jumped 25% compared to when he used either product alone at noon.<\/p>\n

So, what are the best combinations we\u2019ve seen work? Let\u2019s break it down by crop, since that\u2019s what matters most to growers. For vegetable crops (tomatoes, peppers, cucumbers), our go-to mix is our Bacillus-based fungal control with a Trichoderma harzianum BCA. Bacillus attacks above-ground pathogens like early blight and powdery mildew, while Trichoderma colonizes the rhizosphere (the area around plant roots) to fight root rot and damping-off. We have data from independent trials showing this mix increases yield by 12-18% compared to using each product separately, and reduces synthetic fungicide use by 60%. For small fruit (strawberries, blueberries), pairing our microbial fungicide that targets gray mold (Botrytis cinerea) with a predatory mite that eats Botrytis spores and pest mites is a game-changer. Strawberries are super sensitive to synthetic chemicals, so this mix not only keeps fruit clean but also protects the beneficial mites that control other pests like spider mites.<\/p>\n

A lot of growers worry about cost when combining two products, but here\u2019s the upside: because they work together, you can use lower rates of each. Instead of using the full label rate of our microbial fungicide and a full rate of the BCA, you can cut each by 20-30% and get better control. That brings the total cost per acre down, not up. We\u2019ve had growers tell us that switching to combined biological applications saved them $150-$200 per acre last year, even when buying two products instead of one. Plus, many countries now offer subsidies for biological pest management, so the cost is even lower for some growers.<\/p>\n

We also do a lot of custom testing for growers who are nervous about mixing specific products. Not all BCAs are the same\u2014some are for pests, some for diseases, some for both. Some are soil-dwelling, some are foliar. So if you have a specific problem, like fusarium root rot in your corn, we can help you figure out exactly which microbial fungicide plus BCA will work best. Last year, a corn grower in Iowa came to us because his fusarium was resistant to all synthetic fungicides he\u2019d tried. We tested a few combinations and landed on our Pseudomonas fluorescens-based microbial fungicide plus a Paecilomyces lilacinus BCA (which attacks fusarium in soil). That mix reduced fusarium incidence by 80% and his corn yield went up 10 bushels per acre. He\u2019s now a repeat customer and even refers us to other growers in his area.<\/p>\n

Wait, but let\u2019s address the elephant in the room: is there any case where combining them is a bad idea? Yeah, occasionally. If your BCA is a broad-spectrum insecticide that kills all living microbes (including our microbial fungicides), that\u2019s a no-go. For example, some entomopathogenic nematodes produce enzymes that kill bacteria and fungi, so pairing them with our microbial fungicide would be like spraying weed killer next to your vegetable garden. Also, if you\u2019re in an area with extreme heat or drought, combining them might not work as well\u2014you\u2019d have to adjust application times and add extra stickers. But in most standard growing conditions, it\u2019s totally safe and effective.<\/p>\n

Another thing we love about combining these two is that it\u2019s better for the long-term health of your soil. Synthetic fungicides don\u2019t care about the microbes in your dirt\u2014they kill everything, good or bad. But both microbial fungicides and BCAs add beneficial organisms to your soil, which improves soil structure, nutrient uptake, and even drought tolerance. A grower in Georgia told us after using our mix for two years, his soil test showed 3x more beneficial bacteria and fungi than when he was using synthetic chemicals, and he hasn\u2019t had to add as much fertilizer because his plants are better at absorbing nutrients. That\u2019s the big picture stuff\u2014this isn\u2019t just about killing diseases, it\u2019s about building a healthier farm.<\/p>\n

<\/p>\n

If you\u2019re still on the fence about trying this, here\u2019s our advice: start small. Pick one small section of your crop to test the combination, and compare it to a section where you use only one product. Keep track of disease incidence, yield, and cost. Most growers who do this end up switching full-time because the results speak for themselves. We even offer free trial sizes of our microbial fungicide for growers who want to test combinations with their existing BCAs\u2014no strings attached.<\/p>\n

Other Stimulants<\/a> At the end of the day, the whole point of farming is to grow healthy food without ruining the planet. Combining microbial fungicides and BCAs is one of the most effective ways to do that. It\u2019s not a magic bullet, but it\u2019s way better than relying on a single synthetic chemical that can fail you. If you have questions about which combination works best for your crop, or if you want to test our microbial fungicide with the BCAs you already use, we\u2019re here to help. Just reach out to our team to discuss your needs\u2014we work with vegetable growers, fruit farmers, row crop producers, and everything in between.<\/p>\n

References<\/h3>\n
    \n
  1. Zhang, L., et al. (2021). Synergistic interactions between microbial fungicides and biological control agents for plant disease management. Journal of Applied Microbiology<\/em>, 131(2), 897-908.<\/li>\n
  2. Moore, J., et al. (2022). Reducing fungicide resistance risk via combined biological control strategies. Crop Protection<\/em>, 156, 105987.<\/li>\n
  3. van der Wal, A., et al. (2020). Foliar application timing impacts survival and efficacy of combined microbial fungicides and Trichoderma biocontrol agents. Biological Control<\/em>, 151, 104392.<\/li>\n
  4. Smith, K., et al. (2023). Economic and yield impacts of combining microbial fungicides with biological control agents for small fruit production. Journal of Sustainable Agriculture<\/em>, 47(4), 321-335.<\/li>\n<\/ol>\n
    \n

    Grow Plus Crop Protection Co., Ltd.<\/a>
    As one of the most professional microbial fungicide manufacturers and suppliers in China, we’re featured by quality products and good service. Please rest assured to wholesale bulk microbial fungicide at competitive price from our factory. Also, quotation is available.
    Address: Room 1101, Building 26, Zhongke Innovation Plaza, No. 150 Pubin Road, Pukou District, Nanjing City, Jiangsu Provience
    E-mail: Lily@natur-sim.com
    WebSite:     https:\/\/www.gpglo.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    If you\u2019ve been hanging around the ag industry for any length of time, you\u2019ve probably heard … Can microbial fungicide be used in combination with biological control agents?<\/span>Read more<\/a><\/p>\n","protected":false},"author":51,"featured_media":3528,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3491],"class_list":["post-3528","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-microbial-fungicide-4f10-b48413"],"_links":{"self":[{"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/posts\/3528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/comments?post=3528"}],"version-history":[{"count":0,"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/posts\/3528\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/posts\/3528"}],"wp:attachment":[{"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/media?parent=3528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/categories?post=3528"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.lotfitrade.com\/blog\/wp-json\/wp\/v2\/tags?post=3528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}