Kentucky Pollinator Handbook
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Natural Resources Conservation Service Kentucky Pollinator Handbook A Field Office Technical Guide Reference for the Management of Pollinators and their Habitats A publication of NRCS Ecological Sciences in conjunction with Kentucky Department of Fish and Wildlife Resources, The Xerces Society for Invertebrate Conservation and The Nature Conservancy Kentucky Pollinator Handbook Cover Photo: Picture of a two-year old Conserva- tion Reserve Program (CRP) pollinator planting (CP42) in Russell County, KY. Photo: N. Adamson “Helping People Help the Land” USDA is an equal opportunity provider and employer. 2 Kentucky Pollinator Handbook ACKNOWLEDGEMENTS CONTRIBUTING & CONSULTING AGENCIES: Consultants and contributors include: U.S. DEPARTMENT OF AGRICULTURE, NATURAL RESOURCES CONSERVATION SERVICE KENTUCKY STATE NATURE PRESERVES COMMISSION KENTUCKY DEPARTMENT OF FISH AND WILDLIFE RESOURCES THE XERCES SOCIETY FOR INVERTEBRATE CONSERVATION JULY 2016 CONTRIBUTORS: Casey Shrader, KY State Biologist, USDA Natural Resources Conservation Service, Lexington, KY Nancy Adamson, Pollinator Conservation Specialist, The Xerces Society, Greensboro, NC Jeff Sole, Director of Conservation Programs, The Nature Conservancy, Lexington, KY Mike Hensley, Green River Project Director, The Nature Conservancy, Canmer, KY 3 Kentucky Pollinator Handbook 4 Kentucky Pollinator Handbook TABLE OF CONTENTS PAGE INTRODUCTION 7 POLLINATION SERVICES IN KENTUCKY 9 NATIVE BEE AND BUTTERFLY DIVERSITY 11 Important Insect Pollinators 12 The Monarch Butterfly 15 POLLINATOR BIOLOGY AND HABITAT 18 POLLINATOR CONSERVATION AND FARM PLANNING 20 I RECOGNIZING EXISTING POLLINATOR HABITAT 21 A Existing Plant Composition 21 B Nesting and Overwintering Sites 22 C Existing Areas of Open and Forested Landscapes 24 II PROTECTING POLLINATORS AND THEIR HABITAT 25 A Minimizing Pesticide Use 25 B NRCS Pesticide Planning & Risk Assessment 28 C Minimizing the Impact of Mowing, Haying or Grazing 29 D Protecting Ground Nesting Bees 29 E Protecting Tunnel Nesting Bees 29 F Supporting Managed Honey Bees 30 III ENHANCING AND DEVELOPING NEW POLLINATOR HABITAT 33 A Site Selection 33 B Habitat Design 36 C Plant Selection and Seed Sources 42 D Creating Artificial Nest Sites 46 ESTABLISHMENT, MANAGEMENT & MAINTENANCE OF POLLINATOR IV 50 HABITAT A Woody Establishment 51 B Woody Stand Maintenance 51 C Herbaceous Seedbed And Site Preparation 52 D Herbicide Use 52 E Herbaceous Planting 53 F Conventional Seeding 54 G No-Till Using a Truax or Other Seed Drill 58 V POLLINATOR HABITAT AND NRCS PRACTICES 62 5 Kentucky Pollinator Handbook TABLE OF CONTENTS PAGE APPENDICES 74 I FINANCIAL RESOURCES 76 II PLANT TABLES 78 A Word Concerning Pollinator Plants 78 Plant Table Notes And Definitions 78 A. Native Plants Suitable for Pollinator Applications in Kentucky 82 Non-Native, Non-Invasive Plants Suitable for Pollinator Applications in Ken- B. 98 tucky C. Common Crop Species Useful to Pollinators 100 Non-Native Plants Suitable For Use In Crop Rotations, Cover Crops and D. 101 Green Manures E. Plants Principally Pollinated by Flies or Beetles 102 III PLANT MIXES 104 Woody Mixes 104 General Woody Species Mix for Pollinators 106 Linear Woody Species Mix for Pollinators 107 Herbaceous Mixes 110 General Purpose Mix For Pollinator Habitat #1 112 General Purpose Mix For Pollinator Habitat #2 113 General Purpose Mix For Pollinator Habitat #3 114 Wet Site Mix For Pollinator Habitat 115 General Pollinator Site Mix Attractive To Hummingbirds 116 General Mix For Monarchs & Other Butterflies 117 Linear Conservation Cover Plant Mix For Pollinators 118 Spot Area Mix for Pollinators 119 IV SOURCES OF PLANT MATERIALS 120 Commercial Native Seed & Tree Vendors 122 V COMMON BEES 127 VI ADDITIONAL INFORMATION 131 VII GLOSSARY 136 REFERENCES 141 6 Kentucky Pollinator Handbook Introduction he work of bees and other pollinators is something that touches us all through the food we eat, the clothes we wear and the landscapes we enjoy. Pollinators are an integral part of our T environment and vital for our agricultural systems; they ensure production of at least 35% of the world’s food crops. Global animal pollinators include bees, butterflies, moths, some wasps, flies, beetles, ants, bats and hummingbirds. There are an estimated 20,000 species of bees world- wide, with approximately 4,000 species native to the United States. While we often rely on the non-native European honey bee (Apis mellifera) as a managed pollinator for many crops in the United States, recent research has highlighted the importance of diverse wild pollinators, espe- cially native bees, in crop production. With de- clines of honey bee colonies because of disease and other factors, the need for supporting diverse pollinators grows even more important to the fu- ture of agriculture. Native bees provide free pol- lination services, but require habitat that includes nesting sites and sources of pollen and nectar throughout the growing season, in addition to the crops needing pollination. They are often spe- cialized for foraging on particular flowers, such as squash, berries, or orchard crops. This spe- cialization results in more efficient pollination and the production of larger and more abundant fruit from certain crops. Native bees contribute an estimated three billion dollars’ worth of crop pollination annually to the U.S. economy. The Natural Resources Conservation Service (NRCS) can assist landowners by suggesting lo- cally appropriate plants and crop management This bumble bee (Bombus spp.) in Woodford County, that provides areas for foraging (nectar and pol- KY shows why native bees are excellent pollinators by moving pollen from one flower to another. len sources) and nesting for organisms that pro- Photo: C. Shrader NRCS KY vide pollination services. These plantings and crop management approaches also support a di- versity of other beneficial insect predators and parasitoids that help reduce crop pest populations. Planners should pay particular attention to boxes like this. Throughout this document there are Planner Notes intended to provide tips and guidance for NRCS conservation planning. 7 Kentucky Pollinator Handbook This document is provided primarily as a tool to provide guidance to NRCS planners. It may be provided to landowners who have an interest in establishing and maintaining pollinator habitat. It focuses on native bees, the most important pollinators in temperate North America; but also ad- dresses the habitat needs of butterflies and, to a lesser degree, hummingbirds and other beneficial insects. Note that by providing habitat for native bees and butterfly species, habitat for European honey bees is also provided. This handbook contains references for assisting landowners and providing sound information regarding the application of conservation practices to restore, en- hance or create habitat for organisms that provide pollination services. References and information within this book will be updated and additional materials will be provided periodically as they become available through revisions or supplements by NRCS. Hummingbirds provide some minor pollination services by utilizing nectar producing flowers such as this cardinal flower (Lobelia cardinalis). Photo: Sue Chaplin http://bybio.wordpress.com 8 Kentucky Pollinator Handbook Pollination Services in Kentucky hy should you care about pollinators? Over one hundred crop species in North America require a visit from an insect pollinator to be productive and approximately one out of Wevery four mouthfuls of food or beverage consumed requires insect pollination. Directly and indirectly, insect pollinated crops in North America are worth almost $30 billion annually – including food, medicines, dyes, and fabric fibers. In temperate zones, most showy flowers are pollinated by insects, especially bees. Almost all herbaceous wildflowers are insect pollinated, and several trees and shrubs, including the dog- woods, redbud, wild plums, sassafras, spicebush, the magnolias and many willows. Most native insect pollinated plants are adapted to a specific group of pollinators that are active at a specific time of the year. Many insects co-evolved with plants, developing the proper size and body con- struction to carry pollen to more effectively pollinate the plant. Without native pollinators, plant diversity and the ecosystems it supports, would be greatly reduced causing a cascade effect on other species survival. As plants are the basis of terrestrial food webs, their reproduction is essen- tial for the integrity of the system. Their reproduction depends on native pollinators. Insects and flowering plants diversified and evolved together, resulting in the most wide- spread occurrence of mutual interdependence in the natural world. The shape, position, chemical and visual attributes of the flower determines which type of pollinator is most likely to be at- tracted to it. Bee pollinated flowers are usually open and accessible, but many are irregular in shape such as legumes, often requiring bees to disturb petals and other structures to gain access to nectar. This in turn leads to picking up or dropping off pollen and ensures pollination in the process. Ultraviolet patches and lines on petals of some flowers guide bees to nectar and pollen. Flower species that have broad flower heads or large flowers that are elevated above surrounding vegetation, such as milkweeds, attract butterflies. Flies are significant in pollinating several trees, including sassafras, and are attracted to small, open shallow