Pest Control Basics for Gardeners: Prevention First, Then the Right Product

Every garden has bugs, and most of them are harmless or even helpful. The goal is not to wipe out every insect, but to keep problem pests below the level where they hurt your plants. Gardeners and growers use a simple approach for this called integrated pest management, or IPM. This guide covers the basics.

The IPM Mindset: Prevention First

IPM means starting with the gentlest, most preventive steps and only moving up to stronger tools when needed. A typical order of operations looks like this:

1. Prevent: grow healthy plants in suitable conditions.
2. Monitor: check plants regularly so you catch problems early.
3. Identify: work out exactly what you are dealing with.
4. Act: use the simplest effective control, starting with non-chemical options.
5. Review: see whether it worked before repeating or escalating.

Step 1: Prevention

Stressed plants attract pests, so healthy growing conditions are your best defense.

• Give plants the right light, water and drainage for their species.
• Avoid over-fertilizing, which can produce soft, lush growth that insects like.
• Space plants so air can move through the canopy, which also reduces fungal problems.
• Quarantine new plants for a week or two before putting them near your others.
• Keep the area clean. Remove dead leaves, fallen fruit and weeds that shelter pests.
• Use clean tools and pots. Our cleaning and sanitation category can help.

Step 2: Scouting

Scouting simply means looking closely and often. Once or twice a week, check the undersides of leaves, the growing tips and the area where leaves meet stems. Look for:

• Stippling, speckling or a bronzed look on leaves, which can point to mites or thrips.
• Sticky residue or sooty-looking mold, which often goes along with aphids, whiteflies or scale.
• Chewed leaves or holes, which suggest caterpillars, beetles or slugs.
• Fine webbing, tiny moving specks or clusters of insects.

Sticky cards are a handy monitoring tool. Yellow and blue cards catch flying insects and show you what is around before it becomes a problem. See, for example, Grow1 Blue Sticky Card Traps.

Step 3: Start With Simple Controls

Before reaching for a spray, try a strong stream of water to knock off aphids and mites, hand-pick larger pests, prune off heavily infested leaves, and encourage beneficial insects. For slugs and snails, see our slug and snail control options.

Step 4: Choosing the Right Product

If simple measures are not enough, match the product to the pest and the plant. Properly identifying the pest first saves money and avoids spraying things that will not work. Browse our pest and disease control category, including insecticides and miticides and fungicides.

Insecticidal soaps

Soap-based products work on contact with soft-bodied insects such as aphids, whiteflies and spider mites. They need to reach the pest directly, so thorough coverage, including leaf undersides, matters. They generally have no lasting residual effect, which means repeat applications are common. Examples include Safer Brand Insect Killing Soap II and M-Pede Insecticidal Soap Concentrate.

Neem oil

Neem oil is a plant-derived oil used against a range of insects and mites and, depending on the product, certain fungal problems. It works through contact and by disrupting feeding and growth. See Monterey Neem Oil.

Pyrethrin-based products

Pyrethrins are derived from chrysanthemum flowers and act quickly on contact against many insects. They break down fairly rapidly, but they can be harmful to beneficial insects and to bees and aquatic life if misused, so avoid spraying open blooms or letting runoff reach water. An example is Monterey Take Down-O Garden Spray.

Always Follow the Label

The product label is the law and your best guide. It tells you which pests and plants the product is registered for, how to mix it, how often you can apply it, how long to wait before harvest on edible crops, and what protective equipment to use. Some products are not approved for certain plants or uses, and some are not suited to every state.

• Never mix products unless the label says you can.
• Test on a few leaves first, as some plants are sensitive to oils and soaps.
• Spray in the cool of the morning or evening rather than in bright, hot sun.
• Keep products away from children, pets and food, and store them in their original containers.

Please note that some pest control products, such as certain foggers and concentrated chemicals, are available for in-store pickup only and cannot be shipped. Product pages will say so when it applies.

Rotate and Reassess

If a pest keeps coming back, check whether the underlying conditions are the issue. Rotating between different types of products, as the labels allow, also helps keep any one approach from losing its edge.

Not sure what you are seeing? Shop online at dsgardensupplies.com, or stop by to pick up at 130 Doolittle Drive #17, San Leandro, CA 94577 (Mon-Fri, 10am-5pm Pacific). We ship eligible products nationwide via UPS. Questions? Email dsgardensupplies@gmail.com.