Feeds:
Posts
Comments

Posts Tagged ‘Blueberry Stem Gall’

1. Pine Bark Beetle Damage

Pine bark beetles (Ips pini) made an intricate design on a white pine (Pinus strobus) limb. These beetles are small and range in size from about 1/10 to 1/4 of an inch in length, but they can do a lot of damage when enough of them are in a forest. They feed on the phloem tissue just beneath the bark and if they girdle the branch it will die. Dead branches mean no photosynthesizing and eventually the tree will die. For those who have never head the term; girdling of a branch or tree happens when the phloem and bark has been cut around its diameter in a complete circle. Native Americans and then early settlers used girdling to remove trees from fields and pastures and it is still used by some today.

2. Reindeer Lichens

I saw a beautiful drift of gray and green reindeer lichens recently. This shrubby lichen gets its common name from the way reindeer and caribou paw through the snow to find and eat it. Reindeer lichen reproduces vegetatively by small growths called soredia that break off and grow new lichens under the right conditions. The soredia are carried by wind, water or animals. Reindeer lichens grow about .31 inches (8 mm) per year so it’s clear that this drift has been here for a very long time. They can live for a century or more and studies have shown that only boiling and radiation caused severe damage to them. There are many who believe that lichens are virtually indestructible and are therefore immortal.

3. Reindeer Lichen

Reindeer lichens remind me of corals that you would see under the sea. The grayish white color and the way that the branch tips all point in one direction tell me that this one is gray reindeer lichen (Cladina rangiferina.) I find the biggest colonies of this lichen along the edge of a pine forest, growing in a very thin quarter to half inch of dry sandy soil over granite bedrock. At times they get so dry that if you walk on them it sounds much like it would if you walked on potato chips. I’ve read that reindeer lichens produce a single new branch each year and that their age can be determined by counting the branches. The plants pictured must have been very old indeed. I’m glad that I didn’t have to count their branches.

4. Bittersweet in Tree

Oriental bittersweet (Celastrus orbiculatus) grew into the top of a tree and then found that it had nowhere else to climb so it massed in the tree top, and its bright red berries show that. Bittersweet is very persistent and will simply grow or hang back down until it reaches the ground and then creep until it finds something else standing vertical. As it grows the vine winds tightly around the tree trunk and doesn’t expand when the tree does, so its wire like strength will eventually strangle the tree. This is why its sale and cultivation are banned in New Hampshire.

5. Blueberry Stem Gall

Blueberry stem gall always reminds me of a kidney bean. This gall forms when a shiny black wasp called Hemadas nubilipennis damages a bud while laying her eggs on a tender shoot. The plant responds to the damage by growing a kidney shaped gall around the eggs, and this is where the larvae will overwinter before emerging as adults in the spring. This example was a highbush blueberry (Vaccinium corymbosum) but this wasp isn’t choosy and will also use lowbush plants (Vaccinium angustifolium.) The galls do no real harm to the plants.

6. Witches Broom on Blueberry

This witch’s broom on a highbush blueberry looked very red. It’s interesting that the highbush blueberry’s leaves turn a beautiful red in the fall and the stem galls and witch’s broom are also red. Why so much red present, I wonder. Witch’s broom is a deformity that causes a dense mass of shoots to grow from a single point. It’s not caused by an insect but by a fungus called Pucciniastrum goeppertianum. This fungus spends part of its life cycle on the needles of balsam fir (Abies balsamea) so bushes should never be planted near fir trees. When the fungus releases its spores and they land on the stems and leaves of the blueberry, the bush becomes infected. The fungus overwinters on the bush and in the spring again releases spores which will infect even more balsam fir trees, and the cycle begins again. The disease infects the entire plant so pruning off the witch’s broom won’t help. I’ve worked on blueberry bushes that have borne large amounts of fruit even though they had witch’s broom, so I’m not sure how much the deformity harms the plant. I think it’s more offensive to the eye than anything.

7. Waterlily Leaf in Ice

A water lily leaf was trapped in the ice just off shore in a small pond. It tugged at me and I thought it might make a fine picture, but it looked much better in person than it does here.

8. Hornet Nest

Do hornets care that what they build is so beautiful, I wonder?

9. Burl

There was a time that I thought I had some artistic ability and I’d sit for hours drawing and painting. One of the things I loved especially was pen and ink drawing, and that’s what this burl I found on an old tree stump reminded me of. It looked like a Da Vinci sketch in pen and ink with a colored wash over all to add some depth and character, and how beautiful it was. I think the old master himself would have been pleased to see it.

For those not familiar with burl; it’s an abnormal growth that grows faster than the surrounding tissue. Scientists don’t fully understand why it happens but burls are thought to grow on trees that have been weakened by stress or damage.  Once the tree’s defenses have been weakened insects and /or fungi can attack and cause the abnormal growth. Woodworkers make some very beautiful things from burl and prize burls highly. Bowls and other objects made from it can sometimes sell for thousands of dollars.

10. Wooly Aphids

I found this colony of wooly alder aphids (Paraprociphilus tessellatus) on an alder limb. These insects can be winged or unwinged and need both silver maples and alders to complete their life cycle. Eggs overwinter in crevices in the bark of silver maple trees. In spring, nymphs hatch and begin feeding on the underside of new leaves. In late May through July, they develop wings and fly to alder trees where they feed on twigs and begin reproducing. Soon the colony is composed of aphids in all stages of development and becomes enveloped in white, fluffy wax as seen in the photo. Some aphids mature, return to silver maple trees and mate. Each mated female lays only one egg, which once again starts the overwintering stage.

11. Wooly Aphids

Wooly aphids are sap sucking insects that secrete sweet honeydew on branches and leaves of plants. The honeydew attracts a fungus called black sooty mold. Since the mold only grows on the aphid honeydew and not the plant, it doesn’t harm plants. In fact the aphids will do far more harm. I’m not sure if the aphids with dots in this photo always look that way, if they haven’t grown the white waxy covering yet, or if they’ve lost the covering for some reason. They were very small; not even pencil eraser size.

12. juniper Berries

I love seeing juniper berries at this time of year. A waxy coating called bloom makes them a bright and beautiful blue. I always wonder how many gin drinkers know that the unique flavor in their drink comes from this plant’s fruits. Though they’re called berries, botanically speaking juniper fruits are actually fleshy seed cones. Unripe green berries are used to flavor gin and the ripe, deep purple-black berries are the only part of a conifer known to be used as a spice, often used on game like venison, moose and bear meat.

13. Unknown Fungi

Part of what I try to do on this blog is show the amazing and beautiful things that are tucked into virtually every nook and cranny of nature and, with nothing but a slower gait and a watchful eye, how easy they are to see. Walking along at a toddler’s pace and looking at logs is just how I found the unknown fungi in the above photo. I knelt to give them a closer look and saw that they were like nothing I’d seen. Finding unexpected beauty like this can take us to that higher place where time seems to stop for a while. Sometimes it’s hard to know how long you’ve been there but that’s okay; as Mehmet Murat ildan said: “If you are lost inside the beauties of nature, do not try to be found.”

14. Mushroom Mycelium

Mushroom mycelium grew on the bottom of a log where it made contact with the soil. It wept golden nectar and its many intricacies reminded me of distant cosmic nebulae where stars and planets are born.

He who does not expect the unexpected will not find it, since it is trackless and unexplored. Heraclitus of Ephesus

Thanks for stopping in.

Read Full Post »

1. Blueberry Stem Gall

It might look like a fermented kidney bean on a stick but this is actually a blueberry stem gall. Last summer a shiny black wasp called Hemadas nubilipennis damaged a bud while laying her eggs on a tender shoot. The plant responded by growing a kidney shaped gall around the eggs, and this is where the larvae will overwinter before emerging as adults in the spring. This plant was a highbush blueberry (Vaccinium corymbosum) but this wasp isn’t choosy and will also use lowbush plants (Vaccinium angustifolium.) These galls do no real harm to the plants.

2. Witch's Broom on Blueberry

Witch’s broom on highbush blueberry is a deformity that causes a dense mass of shoots to grow from a single point. It’s not caused by an insect but by a fungus called Pucciniastrum goeppertianum. This fungus spends part of its life cycle on the needles of balsam fir (Abies balsamea) so bushes should never be planted near fir trees. When the fungus releases its spores and they land on the stems and leaves of the blueberry, the bush becomes infected. The fungus overwinters on the bush and in the spring again releases spores which will infect even more balsam fir trees, and the cycle begins again. The disease infects the entire plant so pruning off the witch’s broom won’t help. If you have a blueberry plantation and want to keep other plants from becoming infected then any bushes with witch’s broom need to be removed and destroyed.

3. Oak Apple Gall

The first recorded mention of ink made from oak galls and iron was by Pliny the Elder (23 -79 AD). Tannic acid extracted from fermented oak galls was mixed with scrap iron, gum arabic, and water, wine, or beer to make a dark black ink that was used for many centuries in virtually every country on earth. Da Vinci, Michelangelo, Rembrandt, Van Gogh, Johannes Sebastian Bach, Victor Hugo, George Washington and countless others wrote, sketched, and composed with it. The Constitution of the United States was written with it and the U.S. Postal Service even had its own iron gall ink recipe. Chemically produced inks became widely available in the mid-20th century and oak galls went from being prized and sought after to those strange growths seen on forest walks.

4. Willow Pine Cone Gall

If you can stand hearing about one more gall, the willow pine cone gall is an interesting one that isn’t seen that often. The parts of the willow that would have once been leaves were converted into a gall when a fly called a gall gnat midge (Rabdophaga strobiloides) laid an egg on its stem. The resulting larva released a chemical that convinced the willow to produce this gall rather than the leaves that it normally would have. The little pink larva rests inside all winter and emerges as an adult when the air temperature warms up in the spring.

 5. Fishbone Beard Lichen

Fishbone beard lichen (Usnea filipendula) is one of many different beard lichens that we have here in New Hampshire. It is a forest species that seems to prefer growing on spruce limbs and anyone who has ever deboned a bony fish like perch will understand where its common name comes from. The main branches are covered with shorter, stubby branches and the whole thing looks a lot like fish bones. One of the ways I find lichens in the winter is by picking up and looking at fallen tree branches. They almost always have lichens on them.

6. Powdered Ruffle Lichen

This powdered ruffle lichen (Parmotrema arnoldii) grew into a V as it followed the shape of the forked branch it grew on. This is a beautiful foliose lichen  that I don’t see very often because it seems to grow high in the treetops and the only way that I can find it is by inspecting fallen branches. Features that help identify this lichen are the black hairs on the lobe margins, which are called cilia, and the black to brown undersides. There are several similar lichens with the same common name but different scientific names.

7. Sidewalk Firedot Lichen

Sidewalk firedot lichen (Caloplaca feracissima) gets its common name from the way it likes to grow on concrete. In this photo it is growing on the concrete between the stones in a stone wall. If it is seen on stones it’s a good indication that they are limestone or contain some lime because this lichen almost always grows on calcareous substrates. Something unusual about it is how it is made up almost entirely of tiny, almost microscopic fruiting bodies (Apothecia) and doesn’t appear to have a thallus (body) like most lichens.  Firedot lichens can be red, orange, or yellow. There are also granite firedot lichens (Caloplaca arenaria) and sulfur firedot lichens (Caloplaca flavovirescens).

 8. Frost Crack on Gray Birch

A couple of posts ago I talked about frost cracks on trees. Here’s a severe example on a gray birch which probably happened a year or two ago and never healed and which, in this case, will probably kill the tree. Frost cracks happen when the sun warms the tree during the day and the temperature drops quickly at night.

9. Frost Rib on Red Oak

Frost cracks can heal in the summer when the tree produces a new layer of inner bark to heal the wound but then can crack again in winter. When this repeated healing and cracking happens over the course of a few years the buildup of new tissue can create a frost rib like that seen in the photo. It almost looks as if a young tree has somehow grown onto the side of an older tree but that’s only because of the differences in the age of the bark, which of course is much younger on the healed frost crack.

Thanks very much to Michael Wojtech’s book Bark: A Field Guide to Trees of the Northeast for helping me identify and understand this process. If you are serious about nature study this book is a must have.

10. Polypody Ferns

Though it might seem like polypody fern fronds curl in response to the cold in winter, it is really dryness that makes them curl. Polypody ferns are one of a few vascular plants that can rehydrate after drying, much like non vascular lichens and mosses do. Once the soil thaws they will begin to once again absorb water and will return to normal.  When they curl like this it’s a good time to study the spore cases (sori) on the leaf undersides, and a good time to reflect on how dry winter soil can be even though it might be covered by 3 feet of snow.

 11. Woodpecker Holes

 

Long, rectangular holes with rounded corners are made by a pileated woodpecker, probably looking for carpenter ants. It’s hard to tell which woodpecker made the round holes but I’m guessing it was the same pileated woodpecker because they were quite big.

12. Woodpecker Holes

One of the smaller woodpeckers made these holes; maybe a hairy woodpecker. They looked fairly fresh and there were wood chips on the snow so I probably scared this one away.

 14. Beech Bud

The tips of the bud scales on American beech buds (Fagus grandifolia) show just a small hint of the gray, hairy edges that will be on the leaves to come. It is thought that these leaf hairs keep caterpillars and other insects from eating the newly opened leaves, but they also make them something worth watching for. The long feathery hairs disappear quickly once the leaf opens, so you have only a short time to see how very beautiful they are.

13. Beech Bud Break from May 2014-2

I don’t usually reuse photos but since I was on the subject of how beautiful beech buds are when they break I thought that a picture might be worth a thousand words. This is one of the most beautiful things that you’ll ever see in a New England forest in my opinion, and it is just one reason I spend so much time in the woods. It won’t be so very long before we see them again-this was taken in late April last year, just when the spring beauties bloomed.

Natural objects themselves, even when they make no claim to beauty, excite the feelings, and occupy the imagination.  Nature pleases, attracts, delights, merely because it is nature. We recognize in it an Infinite Power.  ~ Karl Humboldt

Thanks for coming by.

 

Read Full Post »