Bugs, Weeds and Water

Pollinator butterfly—Photo credit: MG Gia Parsons Dandelion weeds—Photo credit: Gia Parsons Drip irrigation—Photo credit: MG Linda Shepherd 

Photo credits: MG Gia Parsons (butterfly) & MG Linda Shepherd (dandelions & irrigation system)

Bugs, Weeds, and Water

How can you identify good bugs versus beneficial ones? When does a plant become a weed? What’s the best way to water your garden?

Nature is full of “good bugs” — flying and crawling creatures whose diet includes pests that ravage our precious food plants. Learn to identify these beneficial insects and attract them to your garden with plants like spearmint, feverfew, fennel, and parsley. We don’t want to mistake the good guys for the thug bugs. Ladybug larvae may look ugly, but they eat even more pests than the adults.

Learn to identify, prevent, and control common garden weeds such as chickweed, purslane, plantain, groundsel, pigweed, lambsquarters, dead nettles, stinging nettles, dandelion, yellow wood sorrel, quack grass, reed canary grass, field bindweed, creeping buttercup, and dock.

Discover the best way to water your garden during our dry summers. Designing an irrigation system can be daunting, but this class will help you understand the drawbacks of overhead watering and how, instead, to use flow restrictors, manifolds, timers, soakers, connectors, and various types of emitters.

Below are resources to enhance your learning.

Class 8 Bugs PPT Notes

Class 8 Weeds PPT Notes

Class 8 Watering PPT Notes


  • Beneficial Insects, Spiders, and Other Mini-Creatures in Your Garden — WSU Extension Publication EM067EE, a free 20-page download PDF, has numerous color photos of beneficial predatory bugs, with brief descriptions of their habits and life cycles.
  • Pollination and Protecting Bees and Other Pollinators  — WSU Extension Publication FS174E,a free 9-page download PDF covers the mechanics of pollination, the decline in honey bee populations, and ways to reduce pesticide hazards for bees.
  • Washington Bumble Bees in Home Yards & Gardens — WSU Extension Publication FS263E, a free 8-page download PDF, helps readers recognize bumble bees, understand their general life cycle, and suggest things people can do to encourage these beneficial insects.
  • Lady Beetles: Should We Buy Them for our Gardens?  — WSU Extension Publication FS268E, a free 6-page download PDF, discusses the drawbacks to using purchased lady beetles and suggests some alternatives for attracting and retaining local species.
  • Pest Control in Home Vegetable Gardens — WSU Extension Publication EM009E, a free 7-page online publication, provides a list of vegetables, their common pests and registered pesticides, with cautions about environmental protection.
  • Row Covers  — WSU Snohomish County Extension, Community Horticulture Fact Sheet #19, is a 2-page online publication describing the confirmed benefits of row covers.
  • How to Install a Floating Row Cover — WSU Extension Publication FS089E, a free 3-page download PDF, describes the different types of row covers, how they protect crops, and how to install them.



  • WateringHome Gardens and Landscape Plants — WSU Extension Publication EB1090, a free 6-page online publication, covers best practices for watering plants and strategies for conserving water.
  • Drip Irrigation for the Yard & Garden  — WSU Extension Publication FS030E, a free 6-page online publication, provides an overview of drip irrigation systems, including the benefits and costs, the various components, and the basics of design and operation of such systems.
  • Some Vegetables Require Less Water Than Others  — a free download PDF publication by Oregon State University Extension Service about the water needs of various vegetables.

Click here to Ask Gardening Questions.

Help if you are having trouble signing in. Extension programs and employment are available to all
without discrimination. Evidence of noncompliance may
Website issues? Contact the Webmaster. be reported through your local Extension office.

Copyright © 2020 Master Gardener Foundation of King County, All Rights Reserved. Web Design by FWD»