What’s This Bug? The Fiery Searcher Beetle.

This beautiful beetle is the Calosoma scrutator, commonly known as the Fiery Searcher or simply Caterpillar Hunter. As their name(s) suggests, these beetles are tireless and aggressive predators. Luckily for us humans, the foods they love best are some of the most crop-damaging pests around. They will prey upon a variety of insects in varying life stages, although their favorite is the caterpillar stage. Their dinner of choice depends on whether they are larvae or adults, as they hunt in both stages. Fiery Searcher larvae, since they are not as agile as the adults, prefer to target insects in their pupal stages while adults are way less picky (here’s more on their feeding preferences). According to this article, they favor the all-star list of crop pest which includes the larvae of imported cabbage worms and gypsy moths, the larvae, pupae and eggs of root maggots, as well as the Colorado potato beetle, diamondback moths, cutworms, cabbage loopers, aphids, asparagus beetles, slugs and flea beetles. Some species even eat snails. Fiery Searchers are exceptionally long-lived for an insect; they can live 2 years or more. And during their lives they can consume hundreds of insects. So, these are clearly helpers that you want to have in your yard and garden. 

Fiery Searcher larva (R) eating a Pipevine Swallowtail larva

These beetles live throughout North America, but their numbers are largest in eastern states. They are nocturnal, so even if you live in an area where they are prolific you may not see them. They spend their daylight hours in crevices, under leaf litter, logs and rocks and venture out in the dark. This night-life suits them well; it allows them to  stay hidden from those animals that like to prey on them and the insects that they like to eat are also hiding in daylight for the same reasons. As pests come out at night with a false sense of security and their eyes on your plants, the fiery searchers are ready to snatch them up. 

Fiery searchers are usually found in fields and gardens, although some live on forest floors. These beetles have wings, but rarely fly. Instead, they use their long legs to scamper up branches and tree trunks to grab a meal. They are especially fond of tent caterpillars and gypsy moth larvae, which they find up in the trees. Fiery searchers don’t just use their long legs to climb trees, their legs allow them to run very fast to chase down prey. Their burst of speed in pursuit of prey is similar to a cheetah’s, so much so that they have been called the cheetah of the insect world. 

If you come across a fiery searcher, it is best to give it a wide berth. These are large insects (about 1-1½ inches) with big, sickle-shaped mandibles. They will not hesitate to give a nasty bite if you mess with them. And if that doesn’t do the trick, they can and will emit a foul odor when handled. Clearly they have some tools that help them remain the predator and not become prey.

Fiery searchers are around from May through November but are most active from May through June when trees have leafed out and caterpillar populations boom. In the fall, they will be scuttling around getting the last of the bug goodies before it gets too cold and it’s time to overwinter. They like to spend their winters under some bark or under a rock.

These beetles are glorious – not just in how pretty they are, but in their hunting game. They literally take no prisoners. Here’s a really informative video that shows them in action and this article contains three separate short illustrative videos . Enjoy the glory that is the fiery searcher on the hunt.

Take Care

Submitted by Pam

Fall Armyworms Are Back with A Vengeance.

In case you haven’t heard, the always-awful Fall Armyworm (Spodoptera frugiperda) is making its presence known this year in bigger and more voracious numbers than ever before. In fact, according to this article from the Smithsonian, the caterpillars are invading at an unprecedented level. The reason for this is weather-related, like so much else that is plaguing us at this point in the 21st century. And, since the unheard-of weather events we’re seeing are the result of climate change, so all these caterpillars are yet another symptom of climate change. 

So how do caterpillars and climate change correlate? It takes several steps, each one being more intense than the next as follows: Caterpillar populations boom in drought conditions (which huge parts of the globe are experiencing). The main reason for this is that their natural controls in the form of fungal diseases cannot develop properly when it is too dry. High numbers of caterpillars turn into high numbers of moths. As the moths get flying, they are caught up in storms (and there have been massive storms worldwide recently). Fall Armyworm moths can (and do) survive up in the jet stream, which can take them great distances. Once they finally land in a new place, if there is abundant food they will respond by producing great numbers of larvae (caterpillars). Sometimes this food is carefully planted crops, and other times it’s native grasses. Often, the same storms that brought the moths have caused explosive growth in native plants. Fall Armyworms have traditionally been an issue only in warmer climates as they do not diapause, which means freezing temperatures will kill them. But this distribution is changing as storms move them northward and northern areas warm up. If temperatures stay warm enough through the winter wherever they land, they will just stay there. 

The Fall Armyworm is native to the Americas, but this has not stopped it from expanding its reign of
terror elsewhere. In 2016 it reached Africa, and in 2018 it reached Asia. In both areas, it has set upon maize plants (its preferred food) and other essential food  crops with devastating results. The effect that the Fall Armyworm has had in the developing world has been compounded by its resistance to chemical pesticides and its ability to survive in harsh conditions. In just one year (2018) in Nigeria, these pests disrupted the food supply of 1.5 million people. Faced with such a serious problem, scientists have been working overtime trying to find a solution and it looks like they may be on to something. Parasitoid wasps native to East Africa and India have been identified and, they enthusiastically prey on the non-native armyworm eggs. Here is a great article that will tell you more on this. Suffice to say, these wasps provide a speck a hope in a tragic situation. 

Fall Armyworms are not just resistant to pesticides and drought, they are efficient and relentless. In fact, they got their name from how they march across fields laying waste to everything in their path, just like an army does. They can devastate a golf course in 48 hours and can wipe out a forage crop in hours. According to an article from Texas A&M, the Fall Armyworm moths can lay up to 2,000 eggs which will hatch out hungry caterpillars in two to three days. Their reproductive cycle is fast enough for at least four to five generations to appear in just one growing season. 

Although Fall Armyworms are a formidable foe for growers everywhere, there are some steps that can be taken to gain a measure of control. However, if you have an infestation that is well entrenched already, you may have to scrap the lawn or garden for this season and start over next year. Otherwise, your  best bet for control will always be a multi-pronged approach. The following are some examples of things to use that can get you the help you need. Our Fall Armyworm page has many more suggestions.

Traps and Lures: 

It’s always best to stop an infestation before it starts. With this Scentry Lure, the moths will come right to you and you can monitor how many there are flying about before they turn into ravenous worms (you’ll use it with a Scentry Wing Trap). This will help you plan your next stage of defense. Plus, whatever moths you catch will not be reproducing.

Bacillus thuringiensis:

These beneficial bacteria have proven to be extremely effective against Fall Armyworms, with two caveats: They need to be ingested by the larvae and they work best on newly hatched larvae. We have several species within our inventory for you to choose from. One of our most popular and cost effective products is BONIDE® Thuricide, which is powered by Bacilklus thuringiensis v. kurstaki (Btk).

Insecticides: 

While Fall Armyworms have displayed resistance to conventional insecticides, this is not generally a concern if you use products whose active ingredients are naturally occurring or botanical. These types of products have modes of actions (suffocation, anti-feeding, etc.) that insects cannot develop resistance to. You may want to try Debug® Optimo, Debug® ON or Debug® Trés, all of which use azadirachtin derived from neem seeds. Or there is Entrust™ SC Naturalyte® Insect Control, whose active ingredient is the soil bacterium spinosad. And then there is  PFR-97™ 10% ES which utilizes the entomopathogenic fungus Isaria fumosorosea Apopka Strain 97. All of these are excellent choices.

Fall Armyworms will continue to be a problem until we as  a species can get a handle on climate change. In the meantime, with a little foresight you can reduce the effects these pests can have on your growing things. 

Take Care.

Submitted by Pam.