
Locust and alder trees in my region are commonly infested with mistletoe. Some were severely infested. A few of the locust trees downtown were actually unsightly because they are so stressed and sparse from mistletoe infestation, and also because they were so full of big shaggy mistletoe bushes that obviously do not belong there. Now, viable mistletoe can not be found. Even the carcases of the big dead mistletoe bushes are hard to find. They seem to have died and deteriorated before anyone noticed. The formerly infested trees are noticeably healthier, and producing more healthy foliage than they normally do, partly hiding any remnants of dead mistletoe.
No one here seems to know what happened. Is this part of their natural life cycle? Is there something that sets them off to die all in the same season like some specie of bamboo do? Is there a disease or insect that we should know about? Is this isolated to our region, or is it happening elsewhere as well?
I know I should be pleased that the mistletoe is gone, even if it is only temporary. It is such a destructive parasitic weed! The concern is that we just do not know what happened.
Years ago, Phytophthora ramorum started killing tan oaks. At first, not many of us minded. After all, tan oaks are considered to be trashy trees that clutter otherwise pure redwood stands, or compete with more desirable oaks. Dead tan oaks were better than live ones, and only needed to be cut and split to be sold as seasoned firewood.
The following year, the same disease started to kill coast live oaks. Then we had a problem. Coast live oak is one of the two most majestic oaks in our region (and the most majestic in the Santa Cruz Mountains where the valley oak is uncommon). It took a long time to identify the disease because the ambrosia beetle, which is a secondary pathogen, was initially blamed for the widespread death, which became known as Sudden Oak Death Syndrome, or SODS. It took a few years for the worst of the SODS epidemic to subside, and it continues to kill oaks sporadically.
That is why it is hard to ignore what is happening with the mistletoe, even though we really should be pleased to see it go.
Brent and I met in college, when we were assigned to the same dorm room in Fremont Hall at Cal Poly in San Luis Obispo. Our similarities were remarkable. He came two hundred miles north from west of Los Angeles. I came two hundred miles south from west of San Jose. We were both the middle of three children, although I had just acquired an extra younger sister the year before. While the other boys we grew up with were playing with Hot Wheels, Brent and I were busy planting miniature trees around the miniature roadways. His childhood dog was Speckles. Mine was Freckles. We were weirdly similar prior to September of 1986, but have been perfecting our differences since then.
Sir Isaac Newton had something to say about an apple that was a victim of gravity. My high school physics professor was even better. He taught us all about velocity, force, inertia, vectors and much of what he had to teach us about physics with the help of a very ripe persimmon . . . and an insipid green 1976 Datsun B210.
Many people have a favorite color. I learned how seriously some people can take their preference for a particular color when I was in high school, and taking care of the yardwork for a few homes in the neighborhood. There were three tract homes next to each other. One was grayish blue, with a silvery blue Sedan deVille in the garage, and a garden of blue flowers. The middle house next door was soft amber yellow, with a buttery yellow Oldsmobile 98 in the garage, and a garden of exclusively yellow flowers. The house next door to that was iron oxide red, with an exquisite rich red Electra in the garage, and a garden of, you guessed it, red flowers.

Horticultural industries are full of them; those who changed their respective careers half way through to do something ‘green’. We hear it all the time. “I used to be a ______ (Fill in the blank.), but I got so tired of ______ (Fill in the blank again.) and decided to get into landscaping.” Really?!? That is what you think of the landscape industry? Anyone who flunks out in your industry can ‘easily’ make it in landscaping?
The statute of limitations allows me to discuss this now. It happened thirty years ago, in the spring of 1987. The famous landscape designer, Brent Green, was my roommate in the dorms at Cal Poly, San Luis Obispo. As the bearded iris started to bloom, Brent immediately noticed a bed of uniformly pink bearded iris off the edge of a lawn in the inner campus. He watched it bloom from beginning to end, and occasionally updated me on the progress. During the process, he convinced me that these iris were very rare. Neither of us had ever seen pink bearded iris before. We had no idea that they could easily be purchased from mail order catalogs or nurseries.