Monday, August 31, 2009
The Hill Revisited
Sunday, August 30, 2009
Johnson Grass
This tall grass is Johnson Grass, Sorghum halepense, which is legally defined as a noxious weed in Ohio. It is primarily a problem in crop fields where management techniques reduce competition from other plants. New colonies of Johnson Grass usually occur along the road from seed dropped by vehicles, especially farm equipment, contaminated by seed picked up at another location. Established prairies can often hold their own against Johnson Grass, but it’s best not to let a potential problem get started.
These open panicles are easy to spot atop the tall Johnson Grass plant. Many people think of my prairies as giant weed patches, so I aggressively try to eliminate plants like this that many people can positively identify as a weed. Normally I spray these plants early in the season before they can produce a flower head, but the threat of rain seemed to appear every time I could schedule time for this task.
Once these plants are tall enough to flower, spraying becomes an unsatisfactory method of control. Trying to spray such a tall plant results in a large kill radius and the loss of too many desirable plants in the surrounding area. My fall back strategy is to pull the plants. Pulling is not as effective as spraying because of the plant’s habit of spreading by way of rhizomes. Rhizomes left in the soil after the plant is pulled will survive and produce new plants. Fortunately I have been dealing with these plants for many years and am not working with established colonies. The young plants that I am pulling have not had a chance to produce many rhizomes and older plants are severely stressed when pulled.
These plants have been pulled before seed could begin to develop. Pulling plants that have already produced their crop of seeds results in those seeds being scattered even more than would have occurred if they had been left alone.
Not taking any chances that either early developing seed or hearty rhizomes are left in the field, I’ve carried the pulled plants and piled them in my garden. The organic material will help the soil and no seeds or plants will have a chance of surviving here. New Johnson Grass infestations will continue to occur along the road, so my involvement with this plant will never end.Saturday, August 29, 2009
Ant Swarm
Friday, August 28, 2009
A Walk on the Trail - Part 5 Finale
Thursday, August 27, 2009
A Walk on the Trail - Part 4
Despite the lack of a definitive ID, it stands up well for a photograph.
Across the creek, the ground slopes quickly upward. The soil transition from moist to extra dry is nicely reflected by the change in ground cover.
Another tree down. An obstruction like this changes the creek hydrology and will change the types of organisms living in this section of the creek. These types of changes are a typical occurrence in naturally flowing streams.
There will also be changes on the hillside where additional sunlight is now reaching the ground. This is a typical woodland occurrence and results in a more diverse habitat.
The resting bench. I don’t spend much time sitting here. I can’t seem to sit for more than a few seconds before I see something I have to go investigate. Sometimes I use the bench as a worktable to hold my identification guides while I puzzle out some strange organism.
A moth just shot passed and zipped to the ground in the middle of the trail. A lovely pattern and some really bushy antennae, but I don’t know what species this is.
The trail goes through a thick stand of Lyre-leaved Sage, Salvia lyrata . The only part of the Sage that gets cut by the mower is the flower stalk. The plant does well here with the lack of competition by other plants.
It’s best to watch ahead of you and not yawn as you walk down the trail. These orb weaving spiders seem to always build their webs and hang about face level. It’s bad enough finding yourself with web and spider covering your face, but you definitely don’t want this fellow wandering around your tonsils.
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