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Control Yard Pests Responsibly
Introduction Pests Define Identify Integrated Pest Management Prevention Cultural Biological Chemical Physical Attracting Beneficials Control Yard Pests Responsibly Author: Rebecca McNair Edited By: Allison Steele
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Cycle of Pesticide Dependency
Many chemical pesticides are broad spectrum, killing not only target pests but also beneficial organisms that serve as natural pest control systems. NO natural controls Indiscriminate mortality- pests and beneficials Dependence on chemical pesticides
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In the days following a pesticide treatment, pests reproduce faster than predatory insects. By killing off beneficial insects, pest populations flourish. These pests are spider mites! After Thomas Weissling, Ft. Lauderdale REC After Thomas Weissling
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Tolerance Some damage to plants is natural. Don’t strive for a pest free yard; instead, decide on a realistic threshold of damage.
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What is a Pest, really? Pest- plant, animal, or other organism that is out of place Diseases, Weeds, Insects, Reptiles, Mammals, Arthropods Of all insect species in the world, less than 1 % are considered pests Am I a Pest? This depends on where I am feeding, in the yard or the butterfly garden.
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Scale Aphids Mealybugs Whiteflies
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Nematodes Thrips Spider mites
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Plant Diseases Plant Environment Pathogen A susceptible plant, an agent causing the disease, and a suitable environment are all necessary for disease to occur. Disease occurs when an agent impairs the necessary functions of a plant
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Leaf Spots Algal, bacterial or fungal pathogens
Enters through injured tissues Spread by splashing water, and insects
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Root Rot Poor growth, thinning canopy Yellowing and leaf drop
Branch or plant death Roots dark and rotted, strip off easily Due to excessive soil moisture Poor drainage Over-watering Planting too deep Shallow rooting
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Environmental Stresses
Many environmental effects are mistakenly treated as pest problems. Drought Nutrient deficiency Variations in pH Mechanical damage Cold damage Excessive water or fertilizer Herbicides injured this tomato plant.
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Integrated Pest Management (IPM)
IPM is the coordinated use of pest and environmental information and available pest control methods To prevent unacceptable levels of pest damage by the most economical means With the least possible hazard to people, property and the environment
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Principles of IPM Sustainable Prevention Cultural Practices
-using a resource so that the resource is not depleted or permanently damaged Sustainable Prevention Cultural Practices Biological Methods Physical Methods Chemical Methods In order of descending sustainability After Dr. Norman Leppla
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Prevention Our most sustainable pest control method involves avoiding the introduction of pests (into our country, state or yard). Buy pest-free plants Select plants adapted to your yard Select resistant varieties Avoid notoriously problematic plants Properly install and maintain plants
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Key Plant, Key Pest Some key plants are likely to be infested by key pests. For example, Azaleas are commonly infested by lacebugs, particularly if the azalea is planted in a sunny location.
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Scouting Monitor plants routinely to aid in early detection of an insect, disease, or other problem. Look for: Favorable conditions for pests Signs and symptoms of pests The pests Damage to plant Leaf spot, leaf curl, feeding Frass- insect excretions Presence of natural enemies
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Cultural Practices We can also avoid problems with insects and diseases through proper design, installation, and maintenance. Stressed plants are more susceptible to attack, like the Chinese Elm with crowded roots shown here.
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Water Wisely Water during the early morning, when leaves are already wet Avoid overhead irrigation of woody ornamentals Many foliar diseases gain entry into plants through the water remaining on leaves.
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Biological Control The use of living organisms to control pests
Predators Parasites Pathogens Lady beetles and their larvae feed on aphids and other soft bodied insects. They are commercially available in bulk.
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Attract Beneficial Insects by:
Not using harmful pesticides Providing food Nectar and pollen Plant diversity Providing shelter Enhance vertical layers
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Food for Thought Many herbs and fragrant flowering plants attract natural enemies Gaillardia Milkweeds Goldenrod Echinacea Sunflower Clover Cilantro Dill Fennel Mustards Clover also fixes atmospheric nitrogen into a form available to other plants.
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As A Last Resort…. Sometimes, major pest damage reaches a level that is unacceptable to the observer. When all previous management efforts have been ineffective, individuals may wish to apply: Physical methods Chemical methods These are the least sustainable methods discussed because they are labor intensive, and often require repeated treatments.
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Physical Management Remove pests by hand Remove infested parts
Establish barriers to prevent pest access to plants Yellow sticky paper attracts whiteflies and other insects. These traps help to monitor pest populations in greenhouses.
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Chemicals Choose least harmful pesticides
Use selective pesticides rather than broad spectrum killers Spot treat where pests are abundant, rather than the entire yard Horticultural oils Follow pesticide label instructions carefully
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Management Strategies
Insect Management Strategies “Sap Suckers”- (aphids, soft scales, mealybugs, whiteflies, spider mites) Biological controls Soaps and oils Caterpillars- Bt Plant Chewers- (grasshoppers, beetles, leaf miners) Use a proper insecticide if damage warrants action
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Management Strategies
Disease Management Strategies Leaf Spots- Avoid overhead irrigation Improve air circulation Sanitize- remove infected plant parts to avoid reinfection Stem Cankers/ Stem rots- Change watering and pruning practices Root rots- Change watering practices Remove infected plant and roots Wilt- Remove infected plant
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For More Information on
Visit: Features: Newsletters, presentations, news releases, photo galleries, tutorials, videos, training, publications, diagnostic clinic, listserv, links and more!
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Further Reading http://edis.ifas.ufl.edu
ENY 298 Landscape Integrated Pest Management ENY-276 Beneficial Insects and Mites CIR 642 Homeowners' Guide to Pesticide Safety ENY 292 What’s Bugging Me WEC-20 Dealing with Unwanted Wildlife in an Urban Environment PDMG-V1-01 Characteristics of Plant Disease
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