Biopesticides for berry crop production. Anissa Poleatewich 2016 Biocontrol Berry Day
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2 Biopesticides for berry crop production Anissa Poleatewich 2016 Biocontrol Berry Day
3 Biological control can be used to suppress many types of pest organisms Weeds APSnet Plant pathogens Insects
4 What is biological control? Utilizing beneficial organisms to suppress pest organisms Environment Make the environment less favorable to the pathogen Activate plant defenses Plant Reduce Disease Parasitize or inhibit pathogen Pathogen growth
5 Plants interact with a diversity of microbes Striking a balance is key Phyllosphere Billions of microbes per gram of soil! Plant roots encourage nearby beneficial microbes by providing a food source Rhizosphere Beneficial microbes Pathogenic microbes Commensal microbes
6 What are biopesticides? A type of pesticide derived from such natural materials as animals, plants, bacteria, and certain minerals Includes. Microorganisms (Microbial biopesticides) Serenade, Met52 Naturally-occurring substances MilStop, Regalia Substances produced by plants -
7 What are biopesticides? What biopesticides do Suppress diseases with unique MOAs Act preventatively Effective at low to moderate pressure Promote rooting and plant growth Help plants resist stress Enhance availability of nutrients What they do not do Offer 100% protection Cure diseases (few exceptions) Effective at high disease pressure Last indefinitely Work in environmental extremes
8 How do biopesticides work? Biopesticides suppress disease via one or more modes of action (MOA) Antagonistic metabolites 2. Induced host resistance 3. Nutrient and niche competition 4. Predation or parasitism These MOAs are different from conventional fungicides Lugtenberg and Kamilova Ann. Rev. Microbiol. 63:541-56
9 Antagonistic metabolites toxins or enzymes that kill or interfere with other microorganisms Fusarium G.S. Ali, University of Florida Fusarium + Bacillus
10 Induced resistance Turning on plant defenses 3. Activation of defenses Disease protection on leaves 2. Signalling 1. Perception Trichoderma applied to roots Cartoon: Martinez-Medina et al, Frontiers in plant science
11 Competition Biocontrol agent outcompetes pathogen for space or nutrients Manage environment to disfavor the pathogen and favor the biocontrol agent
12 Predation and parasitism The microbial agent attacks or consumes the pathogen Gliocladium catenulatum (Prestop ) attaching to Rhizoctonia solani A. Poleatewich Bacillus megatarium attaching to Colletotrichum acutatum
13 Several modes of action are often at play Example: Trichoderma spp. are common soil inhabitants and microbial parasites Mycoparasite Competitive exclusion Induces host defenses Antibiosis
14 What are the benefits of using biopesticides? 1. Resistance management alternative modes of action MOA = the way a chemical works Single site vs multisite No rotation of MOA With rotation of MOA 2. Short re-entry and pre-harvest intervals
15 What are the benefits of using biopesticides? 4. Most are exempt from Maximum Residue Limits (MRLs) 5. Worker safety 6. Consumer demand/perception 7. Minimal impact on beneficial organisms predators 8. Align with market trends toward sustainability
16 The goal of disease management is to reduce the harmful effects caused by a disease Control Completely eliminate disease High costs Reactive Management Maintain disease below economic threshold Continual process Must know pathogen biology
17 Biopesticides can deliver value Maximum benefits when used in an IPM program Learning curve Proper use is important Know your crop, pathogen biology Use registered products Consult with extension specialists, product technical support Apply according to the label Check for compatibility
18 Most biological controls are preventative..they must be applied before symptoms appear Spore germination Penetration Mycelial growth Blistering Sporulation 18
19 The evolving biopesticide industry The early years Today Solely the domain of small companies Investment area for leading agrochemical companies Insufficient technical support Insufficient shelf life Formulation improvements Improved technical support Manufacturing control Under-delivered on products Less stringent efficacy requirements Many snake oil products Only the commercially viable have survived More cost effective and predictable products
20 Crop Life Special Report
21 Microbial biopesticides registered in Canada for berry crops Product Formulation Active ingredient Producer Diseases Actinovate SP WP Streptomyces lydicus WYEC 108 Novozymes BioAg Powdery mildew Gray mold Double Nickel 55 LC and WG B. amyloliquefaciens D747 Certis USA Powdery mildew Gray mold Rootshield HC WP Trichoderma harziunum KPL-AG2 Serenade Max and Opti BioWorks WP B. subtilis QST 713 Bayer CropScience Gray mold Powdery mildew Gray mold AAFC Directory of Biopesticides:
22 Non-microbial biopesticides registered for berry crops Product Active ingredient Producer Diseases Fracture Sweet Lupine plant polypeptide - BLAD Timorex Gold Tea tree plant (Melaleuca alternifolia) plant extract FMC Corporation Stockton Ltd. Regalia Maxx Reynoutria sachalinensis extract Marrone Bio Innovations Tivano fermentation products of Lactobacillus casei LPT-111 AEF Global MustGrow Mustard seed meal MPT Mustard Technologies Powdery mildew, Gray mold Powdery mildew Gray mold Powdery mildew Gray mold Powdery mildew Angular leaf spot RK and RL nematode Red stele - Phytophthora Verticillium wilt Pythium Fusarium AAFC Directory of Biopesticides:
23 General characteristics of active ingredients Fungal Bacterial Notes Example Trichoderma spp. Bacillus spp. Streptomyces spp. Re-application rate Environmental Diversity Longer intervals, every 12 weeks Broad ph, soil temps, moisture Shorter intervals, every 4 weeks Narrow ph, soil temps, moisture Microbial based Depends on mode of action Can be variable, check label Compatibility Typically broader Somewhat limited Some can be tank mixed, check label Shelf life Typically up to 1 yr Up to 2 yrs Temperature dependant Hayes. Feb Greenhouse Producer News
24 Keys to better biocontrol 1. Limit pathogen spread with cultural practices 2. Limit conditions favorable for disease 3. Start early, start clean 4. Promote plant health 5. Use Resistant varieties 6. Identify the pathogen Pesticides Fertilizers Biocontrol Intervention Chemical Biological Water management Variety & Transplants or Seeds Cultural & Physical Soil and Rotation Management Site selection, Sanitation, Planting time Prevention
25 Thank You Anissa Poleatewich Research Scientist, Plant Pathology Horticultural Production Systems
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