Which nematode do I need? | BioLogic Company

Find your nematode

1. What pest do you have?

Not sure what it is? Browse the Pest ID pages.

Our three nematodes

Different nematodes hunt in different ways, so each one is best for different pests.

Nematode	Species	Best for
Scanmask	Steinernema feltiae	The widest range of pests, including fungus gnats, root maggots, black vine weevils, and crane flies. Our pick when you're treating several pests or treating to prevent them.
Ecomask	Steinernema carpocapsae	Fleas, and pests near the surface like cutworms. Especially good in hot, dry climates.
Heteromask	Heterorhabditis bacteriophora	White grubs, including Japanese beetle and European chafer grubs.

Not sure what your pest is? The Pest ID pages show what each one looks like and the damage it causes.

Every pest at a glance

Pest	Use	When to treat	Where
Annual Bluegrass Weevil	Ecomask Spray	March to September.	Thatch and the top inch of soil in short-mown annual bluegrass, especially along the edges of fairways, greens, and paths.
Armyworms	Ecomask Spray	May to September.	The damaged area and the healthy grass just ahead of it, where the larvae are moving. Apply in the evening, when they feed.
Artichoke Plume Moth	Ecomask Spray	April to September.	Soak stumps before planting. Drench the crown and stem bases of established plants, and the soil around them.
Banana Moth	Ecomask Spray	Anytime the larvae are active.	Drench the potting mix and spray the stem base and any bore holes.
Banana Weevil	Ecomask Spray	Anytime the larvae are active.	Drench the soil around the plant base and corm. Pour into cut stumps and pseudostems (the trunk-like stems) after harvest.
Billbugs	Heteromask Spray	May to August, or early spring and late summer.	Areas of lawn that show damage, especially sunny areas along sidewalks and driveways, where damage usually starts.
Black Vine Weevil	Scanmask Spray	Early spring through June, or late summer and early fall, while the larvae are feeding.	The drip zone (the soil under the outer edge of the branches) of affected shrubs and plants.
Cabbage Root Maggot	Scanmask Spray	March to June.	Transplants or rows of cabbage-family crops and root vegetables.
Carpenterworm	Scanmask Spray	Anytime the borers are active.	The trunk and limbs around active bore holes, where fresh frass and sap show. Wet the bark and the holes thoroughly.
Citrus Root Weevil	Heteromask Spray	Mid-July through September, when the soil is above 70°F and moist.	Moist soil under the tree canopy, followed by plenty of water.
Click Beetle (Wireworms)	Scanmask Spray	March to June, or at planting time.	Around crops.
Codling Moth	Ecomask Spray	March to September.	The lower 5 feet of the trunk, where the larvae spin their winter cocoons in bark cracks. Keep the bark wet for several hours.
Corn Earworm	Scanmask Spray	June to August.	Spray the soil around and under corn and tomato rows, and the ground where fallen ears and fruit lie.
Cranberry Girdler	Ecomask Spray	May to October.	Spray the soil and thatch over the affected area, then water it in.
Crane Fly	Scanmask Spray	March to June or August to September. Fall is best.	Moist areas of the lawn, and any areas that show damage.
Cucumber Beetles	Scanmask Spray	March to July.	Spray the soil in a band around the base of cucumber, squash, and melon plants, and water it in.
Currant Borer	Scanmask Spray	March to September.	Spray the canes, especially near the base and any cut or pruned ends, until wet. Prune out and destroy wilted canes.
Cutworm	Ecomask Spray	March to July, especially before seeding or planting.	The area you're about to seed or plant.
Diaprepes Root Weevil	Ecomask Spray	Mid-July through September, when the soil is above 70°F and moist.	Moist soil under the tree canopy, followed by plenty of water.
Dogwood Borer	Scanmask Spray	March to July, or September.	The lower trunk (about the bottom 10 inches) and the base of the tree, including rough bark and burr knots on the rootstock.
European Chafer	Heteromask Spray	March to June or August to September. Late summer and early fall is best.	Areas of lawn or turf that show damage.
Flea	Ecomask Spray	Anytime the soil is not frozen.	Shady areas, around buildings and structures, under decks and porches, and wherever your pets spend the most time.
Flea Beetle	Scanmask Spray	March to August. Treat as early in spring as you can.	Rows, or around transplants and seedlings.
Fungus Gnat	Scanmask Spray	Anytime. Indoors and in greenhouses, any time of year.	The soil of potted plants. In a greenhouse, treat the entire greenhouse or plant inventory.
Giant Palmetto Weevil	Ecomask Spray	Anytime the larvae are active.	Drench into the crown and leaf bases at the top of the palm, and around any wounds or bore holes.
Grape Root Borer	Heteromask Spray	Anytime the pests are active.	The soil at the base of the vines, drenched with a sprayer.
Hairy Chinch Bug	Ecomask Spray	Anytime the soil is not frozen.	Spray the damaged patches and a few feet of green grass around their edges.
Iris Borer	Ecomask Spray	April to July. Late May to early June is best.	Around the rhizomes of iris plants.
Japanese Beetle	Heteromask Spray	March to June or August to September. Late summer and early fall is best.	Areas of lawn or turf that show damage.
Masked Chafer	Heteromask Spray	March to June or August to September. Late summer and early fall is best.	Areas of lawn that show damage and areas in full sun, plus the drip zones of shrubs and trees.
Mint Flea Beetle	Ecomask Spray	April to May.	Spray the soil in the mint bed and water it in.
Mint Root Borer	Ecomask Spray	April to May, or August to early October.	Spray the soil of the mint bed and water it in so nematodes reach the rhizomes.
Mole Cricket	Ecomask Spray	Anytime the soil is not frozen.	Areas of lawn with tunnels or damage, especially in sandy soil.
Navel Orangeworm	Ecomask Spray	April to May or August to October.	The orchard floor where leftover (mummy) nuts lie, then irrigate.
Northern Corn Rootworm	Scanmask Spray	Late May to mid-July, while the larvae are in the soil.	Around crops.
Onion Maggot	Scanmask Spray	March to August.	Rows, or around transplants.
Oriental Beetle	Heteromask Spray	March to June or August to September. Late summer and early fall is best.	Areas of lawn that show damage and areas in full sun, plus the drip zones of shrubs and trees.
Peach Tree Borer	Scanmask Spray	March to August.	The soil around the trunk and drip zone (the area under the outer edge of the branches).
Pine Weevil	Scanmask Spray	April to August.	Drench the soil around and over freshly cut pine stumps, and the soil at the base of young seedlings nearby.
Poplar Clearwing Borer	Scanmask Spray	Anytime the borers are active.	The lower trunk and the bark at the soil line until wet, especially around active holes, and the soil right at the trunk base.
Raspberry Crown Borer	Scanmask Spray	March to September.	The soil at the crowns and the base of the canes, drenched.
Root-Knot Nematode	Scanmask Spray	At planting time or before, before knots form on the roots.	The soil where you'll plant, or around transplants.
Shore Fly	Ecomask Spray	Anytime shore flies are present.	The surface of wet growing media and anywhere algae grows, such as benches and floors.
Small Hive Beetle	Heteromask Spray	Anytime the pests are active.	Drench the soil under and in a few-foot ring around each hive. Keep the spray off the hive and the bees.
Sod Webworm	Ecomask Spray	Anytime the larvae are active.	The thatch in and around damaged patches, especially their edges, where the larvae gather. Apply in the evening.
Southern Corn Rootworm	Scanmask Spray	Late May to mid-July, while the larvae are in the soil.	Around crops.
Spongy Moth	Scanmask Spray	April to July.	Spray the lower trunk, any burlap hiding bands, and the leaf litter under the tree in the evening.
Squash Vine Borer	Scanmask Spray	May through July.	The soil around the base of squash and pumpkin vines.
Strawberry Root Weevil	Ecomask Spray	Mid to late August, while the soil is still warm. Early May can also help. With Scanmask or Heteromask, March to June.	The soil at the strawberry crowns, kept moist, applied in the evening or on a cloudy day.
Sugarcane Borer	Ecomask Spray	Anytime the larvae are active.	Stalk bases, leaf sheaths, and the crop debris left after harvest.
Sweetpotato Weevil	Scanmask Spray	March to June, or mid to late summer from about 6 weeks after planting.	Spray the soil along the sweet potato rows and around plant crowns, and water it in. Keep soil moist and fill cracks.
Tobacco Budworm	Scanmask Spray	March to September.	Spray the soil in flower beds and containers under petunias, geraniums, and other host plants.
Western Corn Rootworm	Scanmask Spray	Late May to mid-July, while the larvae are in the soil.	Around crops.
Western Flower Thrips	Scanmask Spray	Anytime the soil is not frozen, especially in the warmer months when thrips are the biggest problem.	The soil or growing media under the plants, where thrips pupate.
White Grubs	Heteromask Spray	March to June or August to September. Late summer and early fall is best.	Areas of lawn that show damage and areas in full sun, plus the drip zones of shrubs and trees.