Key Elements of Ecological Pest Management
Ecological Pest Management relies on preventive rather than reactive strategies. your cropping program should focus primarily on preventive practices above and below ground (#1 and #2) to build your farm’s natural defenses. Reactive management (#5 and #6) is reserved for problems not solved by the preventive or planned (#3 and #4) strategies.
OVERALL STRATEGIES:
- build the strengths of natural systems into your agricultural landscapeto enhance its inherent pest-fighting capacity.
- enhance the efficiency of your farm, including cycling of nutrients, flow of energy, and/or the use of other resources.
These broad strategies and the individual practices that follow result in systems that are:
- self-regulating — keeping populations of pests within acceptable boundaries
- self-sufficient — with minimal need for “reactive” interventions
- Resistant to stresses such as drought, soil compaction, pest invasions
- Resilient — with the ability to bounce back from stresses
1) Crop management: above ground habitat conservation and enhancement of biodiversity within and surrounding crop fields. Use a variety of practices or strategies to maintain biodiversity, stress pests and/or enhance beneficial organisms.
- Select appropriate crops for your climate and soil
- Choose pest resistant, local varieties and well adapted cultivars
- Use legume-based crop rotations, alternating botanically unrelated crops
- Use cover crops intensively
- Manage field boundaries and in-field habitats (ecological islands) to attract beneficials, and trap or confuse insect pests
- Use proper sanitation management
- Consider intercropping and agroforestry systems
2) soil management: below ground habitat conservation and enhancement. Build healthy soil and maintain below ground biodiversity to stress pests, enhance beneficials and/or provide the best possible chemical, physical, and biological soil habitat for crops.
- Build and maintain soil organic matter with crop residues, manures and composts
- Reduce soil disturbance (tillage)
- Keep soil covered with crop residue or living plants
- Use cover crops routinely
- Use longer crop rotations to enhance soil microbial populations and break disease, insect and weed cycles
- Maintain nutrient levels that are sufficient for crops but do not cause imbalances in the plant, which can increase susceptibility to insects and diseases
- Maintain appropriate ph
- Control soil erosion and nutrient losses
- Avoid practices that cause soil compaction
3) Planned supplemental pest management practices. The following practices can be used if research and farmer experience indicate that — despite the use of comprehensive preventive management as outlined above — some additional specific pest management practices will still be needed:
- Release beneficial insects or apply least environmentally harmful biopesticides
- Prune to reduce humidity in the canopy and deter fungal infections
- Cultivate for weed control based on knowledge of critical competition period
4) Planned supplemental soil practices to reduce crop stress and/or optimize yield and quality
- Maintain adequate soil water content (i.e., with careful irrigation scheduling)
- Mow rather than incorporate orchard cover crops, leaving a mulch cover
- Undersow legumes in cereals
5) Reactive inputs for pest management
If, after following preventive and planned management practices (#1, 2, 3, and 4), pests are above threshold levels and beneficials populations are low, release beneficials or apply selected biopesticides with low environmental impact.
6) Reactive inputs to reduce plant stress
- Use chisel plow or subsoiler to alleviate soil compaction
- Apply nutrients to soil or foliage in response to plant deficiency symptoms
Table of Contents
- Acknowledgments
- Introduction
- How Ecologically Based Pest Management Works
- Principles of Ecologically Based Pest Management
- Managing Aboveground Habitat
- Strategies to Enhance Beneficials
- Innovative Tart Cherry Orchard Systems
- Farm Feature: No-Till Cover Crops Yield Soil and Pest Benefits
- Farm Feature: A Toast to Ecological Grape Production
- Sidebar: Reduce Mowing Frequency to Attract Beneficials
- Beetle Banks Boost Beneficials
- Surrounding Crops With Perimeter Fools Pests
- Table 1: Flowering Plants That Attract Natural Enemies
- Farm Feature: Resistant Fruit Varieties Reduce Risk
- Identification Key to Major Beneficials and Pests
- Managing Soils to Minimize Crop Pests
- Healthy Soils Produce Healthy Crops
- Qualities of a Healthy Soil
- Managing Pests With Healthy Soils
- Farm Feature: Triple Threat to Pests: Cover Crops, No-Till, Rotation
- Impacts of Fertilizers on Insect Pests
- Table 2. Pest Populations Increase With Excess Nitrogen Fertility
- Implications for Fertilizer Practices
- Beneficial Agents on the Farm
- Predators
- Table 3: Common Predators
- Principal Insect Predators
- Cover Crops Lure Beneficial Insects, Improve Bottom Line in Cotton
- Parasitoids
- Table 4: Common Parasitoids
- Principal Parasitoids
- Table 5: Major Groups of Dipteran (Fly) Parasitoids
- Cropping Systems Shape Parasitoid Diversity
- Principal Insect Pathogens
- Bacillus Thuringiensis (Bt)
- Putting it All Together
- Designing a Habitat Management Strategy
- Fine-Tuning Farm Management to Enhance Specific Beneficials
- Enhancing Biota and Improving Soil Health
- Strategies for Enhancing Plant Diversity
- Rolling Out Your Strategy
- Key Elements of Ecological Pest Management
- Farm Feature: Rotation, Rotation, Rotation: Alfalfa, Cover Crops Break Pest Cycles
- Universal Principles, Farm-Specific Strategies
- Guidelines for Designing Healthy and Pest-Resilient Farming Systems
- Recent Advances in Ecological Pest Management
- Resources: General Information