Blog
How-to articles on nematodes, pests, and timing.
Bringing Plants Inside? Don't Bring Fungus Gnats With Them
September 27, 2026 · PestsAs the nights get cooler and potted plants come indoors for the winter, fungus gnats can come along for the ride. Here's how to spot them, how to check for them, and how to stop them naturally with Scanmask.
Tips for Using Beneficial Nematodes in the Summer
July 9, 2018 · About nematodesHow to order, store, and apply beneficial nematodes in hot weather, and which pests summer applications control well.
Spring is Coming... How Early Can You Apply Nematodes?
March 13, 2018 · About nematodesAs a general rule, you can apply beneficial nematodes as soon as the soil is no longer frozen. Here's why a cold snap after application is usually fine.
Why Late Summer/Early Fall is the BEST Time to Treat for White Grubs
August 10, 2017 · PestsWhite grubs are small and easiest for nematodes to kill in late summer and early fall. Here's how the scarab beetle life cycle sets the timing.
Fun Find: The Eight-Spotted Forester
July 3, 2017 · Beneficial bugsA friendly eight-spotted forester moth kept landing on us over the weekend. Here's how to recognize this pretty moth.
Other Cool Beneficials: Parasitic Wasps
June 19, 2017 · Beneficial bugsParasitic wasps are tiny natural enemies of many pests, including some that nematodes don't control. Here's how they work and how to use them well.
A Natural Control for Iris Borers
May 12, 2017 · PestsIris borer larvae tunnel through iris leaves and rhizomes. Learn the iris borer's life cycle and when to treat with Ecomask to kill the larvae.
A Natural Control for Corn Rootworms
April 10, 2017 · PestsWestern, northern, and southern corn rootworms can badly damage corn. The nematodes in Scanmask kill the larvae in the soil before they become adults.
Tips and Tricks for Successful Pest Control with Beneficial Nematodes
March 28, 2017 · About nematodesFour tips for getting good results with beneficial nematodes, from buying them fresh to applying enough, at the right time, with the right species.
Protect Your Crops from Onion Maggots
March 7, 2017 · PestsOnion maggots attack early plantings like onions, garlic, leeks, and shallots. Treat in early spring with Scanmask to kill the larvae in the soil.
How Do Nematodes Work?
January 13, 2017 · About nematodesA step-by-step look at how beneficial nematodes find a pest insect in the soil, kill it with bacteria they carry, and reproduce inside it.
How to Kill Thrips with Nematodes
December 29, 2016 · PestsWestern flower thrips damage greenhouse and garden plants. The nematodes in Scanmask kill thrips pupae in the soil to shrink the population.
Protect Your Poinsettias with Beneficial Nematodes
December 7, 2016 · PestsPoinsettias and other houseplants often come home with fungus gnats. Scanmask kills the gnat larvae in the potting soil, safely.
Getting Rid of Fungus Gnats: A Green Alternative for Interiorscapes and Potted Plants
November 28, 2016 · PestsFungus gnats multiply fast in potted plants. Learn their life cycle and how the nematodes in Scanmask kill the larvae in the soil.
A Natural Control for the European Chafer
September 23, 2016 · PestsEuropean chafer grubs can quickly destroy lawns. Treating with Heteromask in the fall, while the grubs are small, means fewer grubs next spring.
Complete List of Pests Killed by Beneficial Nematodes
September 14, 2016 · About nematodesA long list of insect pests that beneficial nematodes are known to kill, with scientific and common names, and a note on why nematodes work best on soil-dwelling pests.
How to Kill Crane Flies with Nematodes
September 8, 2016 · PestsCrane fly larvae damage lawns and turf. Treating with Scanmask in the fall, while the larvae are in the soil, means fewer crane flies next spring.
A Praying Mantis Feasting on a Grasshopper
August 29, 2016 · Beneficial bugsWe found an adult praying mantis on our window screen and watched it eat a grasshopper. Mantises are great beneficials that eat many pests.
Milkweed Longhorn Beetle
August 8, 2016 · Beneficial bugsWe found milkweed longhorn beetles in our field. These red, spotted beetles feed only on milkweed and are usually more friend than pest.
FAQ: How to Kill White Grubs with Nematodes
August 3, 2016 · PestsAnswers to common questions about white grubs, including which product to use, when to treat, how many nematodes you need, and how to apply them.
Striped Cucumber Beetle (A Natural Control)
July 5, 2016 · PestsCucumber beetle larvae feed on roots in the soil, where Scanmask nematodes can kill them. Treat in June or July to stop the next generation.
What Nematodes Should I Use?
March 22, 2016 · About nematodesA guide to BioLogic's three nematode products, Scanmask, Ecomask, and Heteromask, and which one fits your pest problem.
IPM: 5 Reasons to Use Nematodes
December 21, 2015 · About nematodesIntegrated Pest Management combines several kinds of pest control. Here are five reasons beneficial nematodes fit well into an IPM program.
5 Advantages of Beneficial Nematodes
December 7, 2015 · About nematodesFive reasons beneficial nematodes are a better choice than chemical pesticides, from safety around kids and pets to longer-lasting control.
Insect Killing Nematodes
December 5, 2015 · About nematodesBeyond the three species BioLogic produces, many other nematodes kill insects. Meet two of them, mermithid nematodes and Beddingia siricidicola.
Shipping, Shelf Life and Storage
November 30, 2015 · Shipping and storageNematodes are alive, so how they're shipped and stored matters. How BioLogic packs its nematodes, and how long each product keeps in the refrigerator.
Root-Knot Nematodes: How to Spot Them and a Natural Control
March 29, 2015 · PestsSwollen, knotty roots and plants that won't grow? Learn the signs of root-knot nematodes, which plants they hit hardest, and how the beneficial nematodes in Scanmask can help.
The Flea Nematode
June 23, 2014 · PestsWhich nematodes kill fleas? Ecomask and Scanmask both kill flea larvae and pupae in the yard. How to apply them, and where to focus.
Tobacco Hornworm
September 10, 2013 · PestsTobacco hornworms can strip tomato plants fast. How to remove them by hand, and why you should keep the ones carrying parasitic wasps.
Assassin Bug
June 9, 2013 · Beneficial bugsWe found young assassin bugs hatching on our house. These "good bugs" are stealthy predators of garden pests, but keep your distance, since their bite hurts.
Pink Spot Ladybird Beetle
June 8, 2013 · Beneficial bugsWe spotted our first native pink spot ladybird beetle in our Pennsylvania garden, along with ladybug larvae nearby.
Scale
May 29, 2013 · PestsWe found soft scale on our young sugar maples. How to identify armored and soft scale, and how to treat it without harsh chemicals.
5 Lined Skink
May 12, 2013 · Beneficial bugsWe found a five-lined skink near our garden. Here's how to recognize this common East Coast lizard and why it's a welcome guest.
How to Identify (and Kill!) White Grubs
April 5, 2013 · PestsHow to tell which white grub you have by looking at the raster pattern on its underside, with drawings of the five most common grubs, and how to treat them with nematodes.
Infected White Grub
March 25, 2013 · About nematodesPhotos from our own test of a white grub infected by the Steinernema feltiae nematodes in Scanmask at cool soil temperatures.
What Nematodes Should I Buy?
March 15, 2013 · About nematodesA buying guide for beneficial nematodes, covering where they come from, how many you really need per square foot, and where to buy them.
Brown Marmorated Stink Bug
December 3, 2012 · PestsThe invasive brown marmorated stink bug invades homes in the fall and damages fruit trees and crops. Here's its life cycle and the ways to control it.