Silverfish

Silverfish in the order Thysanura are one of the most common household pests found in North America. They are considered cosmopolitan which means they are found nearly Worldwide. Unmistakable in appearance with a teardrop-shaped wingless body, three long projections coming from their posterior end and two long antennae located on their head. Silverfish reach lengths up to 3/4 of an inch, and are covered in tiny scales and usually soft bodied. Their common name of silverfish comes from the silvery-blue coloration and their fish-like movements. These are incredibly fast insects capable of extreme short bursts of speed. They typically hang out in areas of high humidity including basements, bathrooms, garages and closets, but may also be found in attics, bedrooms and other parts of your home. They are nocturnal and prefer to remain hidden from humans, therefore infestations are rarely noticed until they are large in number. Humidity levels between 75% and 95% seem to be ideal for optimum population growth and survival.

They feed on a wide variety of substances but prefer carbohydrates in the form of sugars and starches. Diet may consist of glue, book bindings, plaster, photos, paper, sugar, coffee, carpet, clothing and even dandruff. But they will also consume proteins, silk, cotton and synthetic fibers. It is this feeding preference that gives them pest status as they can cause damage to many of our valuable items. They are capable of living up to a year or possibly longer without eating, and in times of famine may turn to other forms of food for sustenance such as meat. If you discover an infestation of silverfish you will need to contact a pest control agent to treat your home in order to get rid of them. Some claim to have good luck with using cinnamon or nutmeg as a repellent to keep them away from certain areas of your home. Although these household spices will not kill them, it may afford you some comfort in keeping them at bay. Silverfish are also prey for arthropods such as earwigs, house centipedes and spiders.

Other methods that may help prevent or control silverfish infestations are:

• Keep bookcases clean by vacuuming and shaking out books occasionally
• Prevent the stockpiling of newspapers
• Reduce the humidity in the basement and laundry room with a dehumidifier
• Store starched linens in sealed plastic bags
• Repair leaky pipes and patch openings around pipes and conduit
• Periodically clean out closets, cabinets, and storage containers
• Keep dry processed foods in containers with tight lids

Silverfish are one of the longest lived insects, living from 2 to 8 years and are capable of producing up to 100 offspring in their lifetime. Reproduction is an elaborate affair that consists of a mating dance where the male will approach the female and they will face each other touching antennae. The male will back away and return and once again touch antennae. This may be repeated numerous times. Then the male will run away from the female and the female will pursue him. Once she catches up to him the male will line himself up beside the female so that their tails touch. He will begin vibrating his tail against the female. This stimulates the male to release a spermatophore and stimulates the female to take the spermatophore up into her body. Once the eggs are fertilized she will lay them from one to 60 at a time in small clusters hidden away in tiny cracks or crevices. It takes the eggs from two weeks to two months to hatch.

They will be born looking nearly identical to the adults in appearance, except they will be white instead of silvery-blue. They gain the silver coloration as they age and molt. From 3 months to 3 years they will reach adulthood and will continue to molt even after reaching adult age. They may molt up to 66 times in their lifetime, and some specimens have been documented molting 30 times in a single year! That is highly unusual for an insect.

Even though they are not known to bite humans or carry diseases that can be spread to humans I still kill them each time I find them. I normally let all bugs live, and even if I don't want them in my home I just take them outside and turn them loose. But I have a huge book collection and cannot risk the silverfish damaging them. 

Silver-Spotted Skipper

With the unseasonably warm weather we've been experiencing here in NW Missouri it puts me in mind of spring and butterflies. One of my favorites is the very common, yet beautiful Silver-Spotted Skipper (Epargyreus clarus). When I say common, I literally mean dirt common, they are everywhere in the spring and summer all over Missouri. They can be found in backyard gardens, open fields, prairies, parks, you name the place and these butterflies are sure to be there.These butterflies belong to the family Hesperiidae, which are the skippers. Silver-spotted skippers are the largest skipper in North America with a wingspan up to 2 5/8 inches. This may not seem large, but by skipper standards it is quite huge. Most skippers have a wingspan of one inch or a bit more.

Identifying them is much easier than other skippers which can be confusing even to the experts. Silver-spotted skippers are chocolate brown with orangish blocky spots on the forewings and silvery-white spots on the underwings. It is this silvery-white spot that earned them their common name.

Like all butterflies they are diurnal, flying about during the day nectaring at a wide variety of flowers, including clover, coneflowers, thistles, blazing star and others. They seem to prefer flowers that are red, pink, purple, blue or white. At night they rest underneath leaves of plants or trees which effectively hides them from night creatures that may want to dine on them. It will also shield them from heavy overnight dew.

With few exceptions, butterflies are often part of the diet of many predators including birds, frogs, small mammals, and spiders. Exceptions would be monarchs, pipevine swallowtails, etc. that glean toxins from the plants they consume as caterpillars. Skippers have no such toxins and therefore fall victim to many predators. Spiders in particular are excellent at capturing these butterflies as they hide on flowers waiting for passing butterflies to alight and begin nectaring. The spider will very stealthily approach the butterfly, unseen, and reach out with their front legs and sink their fangs in and give a venomous bite, This bite is designed to subdue the prey and turn the insides of their prey into a nutritious, liquidy, buggy milkshake that the spider will slurp up with relish.

(Flower crab spider feeding on silver-spotted skipper)

Males will perch on branches of low lying bushes or on tall plants to wait for females to fly by. Once a receptive female has been mated, she will lay eggs one at a time on the leaves of the host plant which are black locust, honey locust, and false indigo. With all the honey and black locust trees found throughout the state it explains why these butterflies are so prolific in our state. They certainly have plenty for them to eat. Even the drought we have been experiencing since June did not affect them to the degree it did other butterflies and insects. For obvious reasons, droughts are hard on all animals, even insects. With no rain, plants cannot grow or continue to produce. This causes a lack of food sources available to the females, so therefore there will be no subsequent generations until the rain returns. 

Who knows with the 65 and 70 degree weather we've been having, I might not have to wait until spring to see a butterfly.

Black Blister Beetle

This matte black beetle is a Black Blister Beetle (say that fast three times). These beetles are in the family Meloidae. They are quite common around here, especially in the fall. I find them frequently on the goldenrod around our farm. Some plants will have dozens of these beetles on them.Many of them are mating and creating mirror images of themselves for the next generation. With nearly 7500 species of blister beetles found throughout the world there is no shortage of these noxious bugs to be found. 

(This particular beetle seems to have an injury. Not sure what caused it. I can't imagine that anything would chose to feed on these beetles, but perhaps some predators don't mind the nasty taste. Or maybe the predator discovered the noxious taste after biting a wing off and decided that was enough)

 They have an elongated body with a very narrow thorax. This cylindrical shape is very typical of blister beetles. They are commonly found in  vegetable and flower gardens. Look for them near croplands, especially forage crops. The adults feed on a wide variety of foods like clover, alfalfa, soybean, radish, carrot, beans, cabbage. In the wild they will feed on pigweed. They also will feed on ornamental plants like Hostas. The black variety is especially fond of goldenrod. After mating, the females will lay eggs in clusters in the soil. After the larvae hatches it will seek out grasshopper eggs and young grasshopper nymphs that are beginning to surface from underground. Sometimes they will also feed on bee larva. This makes them an important natural control measure for these often time invasive insects. Blister Beetles aren't always the "good guy" however. They have a dark side. Blister beetles contain a chemical in their legs called cantharidin. This chemical is extremely toxic, especially to horses. The horses come in contact with the beetles in their feed. The beetles feed on alfalfa, then the horses also feed on the alfalfa. As few as 550 beetles can kill a young horse weighing 275 pounds. This chemical is also found in the controversial drug called "date rape drug". 

I myself have had a run-in with these beetles. Several summers ago we had 100's of these beetles all over our farm. They were in the gardens, in the flowers beds. They were feeding in large numbers on my hostas, and had nearly defoliated the hostas before the summer was over. At night they were around the pole lights. I also spent a lot of time near the pole lights, looking for bugs to photograph, or capture for my collection. One night I felt one of these beetles land on my neck, as I went to brush it off me it released some of this awful chemical and blistered my skin. This blister hurt for days and left a welt for over a week. These beetles mean business, this is chemical warfare at its finest.

These beetles are best looked at and not touched. They are common and easily found, some years there seems to be more of them, than other years. In the past two years I've not seen populations of them anywhere near like what I had several summers ago

Claymore Vol. 06 Capítulo#028

Spotted Cucumber Beetle

Spotted Cucumber Beetles(Diabrotica
undecimpunctata), are small (3 or 4 mm) in size, but bright in color. They superficially resemble ladybugs with those spotted wings, but instead of bright red, pink or orange like ladybugs they are a lemon-lime green. Their head is black as are their legs. Don't let their diminutive size fool you though, these beetles are extremely destructive.They overwinter in leaf litter near fence rows, wood lots and areas near protected buildings. In the spring with the return of warm weather they will become active again. They will seek mates in early spring and the female will lay her eggs in the soil near the base of host plants. When the eggs hatch the young larvae will burrow into the soil to feed on the roots of various plants. It is this activity that has earned them the common name of Southern Rootworm.  After a few weeks they will emerge as adults and it is these grown up beetles you will find in your gardens feeding on the leaves of cucumbers, as well as squash, melons, beans, beets, tomatoes, potatoes, eggplants, cabbage and a host of other garden favorites. 

As adults they prefer to nectar at flowering plants, but will feed on nearly anything they can find. Although it isn't the adults that wreck havoc, it is the wormlike larvae of this beetle that causes so much irritation and expense to farmers and growers everywhere. Their burrowing action damages the root systems of a vast amount of grain crops, especially corn. They are even known vectors of bacterial wilt. Millions each year in crop loss are attributed to these little spotted beetles. There are two other subspecies of this beetle and each are equally problematic to farmers and growers; Western cucumber beetle (Diabrotica undecimpunctata tenell) and the Western spotted cucumber beetle (Diabrotica undecimpunctata undecimpunctata). They aren't typically found in our region, you will instead find them out west as their names indicate. 

As a farmers wife I can sympathize with the farmers in their constant battle to stay one step ahead of an often times unseen enemy. The farmers job is to grow a good healthy crop, and get it to market (hopefully for a profit) so he and his family can make a living. So when these unwelcome visitors make themselves at home in the crops, often times drastic measures have to be taken. All too often this in the form of pesticides. While I am a farmers wife I am far from an advocate of pesticides. All too often they are used in ways that cause more harm than good. Pesticides do not differentiate between helpful insects or harmful insects. So many times the insects that actually benefit us are killed in the line of fire.I will never encourage anyone to use pesticides as I feel the damage they can cause far outweighs the benefits. Often if we will allow mother nature to do her job she will surprise us in many ways. Many other beneficial insects, birds, spiders and other known predators of insects will step up their game and consume the problematic insects. If we spray these chemicals and kill off all our beneficial insects we are defeating our purpose. Approximately 5% of the harmful insects will survive the onslaught of chemicals. These insects will now have a small resistance to the insecticides designed to kill them. They will pass this resistance off to their offspring and within a few generations these harmful insects will have total resistance to the chemicals. Now the chemical companies have to create new insecticides to kill the same insects. We essentially accomplish making the chemical companies richer. Bats, birds and the surviving beneficial bugs will leave your area because it has now become a wasteland of death and there is no longer anything for them to eat.These chemicals leach themselves into our soil and make their way into the water systems, whether that is in the form of ponds, lakes, rivers, or the well water we drink and cook with. What impacts will that have on other wildlife? On humans?

 We have 66 acres of row crops here on our farm. We rotate corn and soybeans each year and we have not used a pesticide, insecticide or fungicide in over 15 years. We have experienced no crop loss due to bugs, because we recognize that there are many insect predators out there taking care of it for us. 

The drought heavily impacted the plants and animals in our region this year. We received early rains, then no rain throughout the summer and some late rain in the past couple of weeks. It seemed to create a perfect situation for these beetles, as I've seen record numbers of these beetles this year. All feeding on the tomatoes and melons in our garden. Thankfully the remaining veggies are not good for human consumption so the bugs can have them.

Honey Bees + Wax Worms= Epic Fail

Several week ago I asked a friend of mine, Shannon, to come out and help me open up my hive and see how they were doing. I was concerned as I had noticed an extreme reduction in the number of bees hanging out around the hive. When Shannon arrived we gathered our equipment and headed to the hives. We smoked the larger hive and opened it. I could tell my bees were gone....just gone! I told Shannon, and he said they were out foraging. I knew better. I sit and watch these bees all the time and I know their habits. We began taking the hive apart and discovered a few wax worms. We killed them and removed the damaged comb. As we delved deeper into the hive we found several more wax worms and each one was killed and the contaminated comb removed. We put the hive back together and moved onto the next hive. This hive was young, and wild caught. I've only had it about 6 or 8 weeks. They seemed to be doing well and we saw no evidence of wax worms.
I was still deeply concerned about the older larger hive, but decided to try not to worry too much.

The following week we packed our bags and went to the Smoky Mountains for a family vacation. Eight days later we returned home and I had to plan a large event for work and my time was tied up with last minute details revolving around that event. It was an additional week before I was able to get around to checking on the hive again. To say I got a surprise would be an understatement.  I opened the top on the hive and got a face full of moths. I was so disgusted by what I found, the entire hive was desecrated by wax worms!

Waxworms are the larval stage of the Wax Moth in the family Pyralidae which are the snout moths. There are two species that are often bred for fish bait and are often called waxies by bait shop owners and fishermen. They are favored by fishermen who enjoy catching small game fish like sunfish, but for beekeepers they are a nightmare.  They are a parasite of bees and feed on the honey comb, beeswax, shed skins of bees, pollen and cocoons. They can destroy a weakened beehive in no time. A strong, healthy hive functioning with all members can usually fight off a waxworm threat. A divided hive with no queen is severely weakened and would not be able to deal with a scourge like waxworms. Which is essentially what happened to my hive.

This fall when the weather cools down  I will clean up the mess in the hive and sterilize it. Next spring I will try once again to raise a successful hive. The smaller hive I had I gave to Shannon to hand over to another bee keeper so as not to risk it getting contaminated with waxworms. So hopefully next spring will turn out better.