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#1
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Where have all the earthworms gone????
Hmmm... some people lose their house keys, I lose all the earth worms. They
seem to have completely disappeared from my garden. I turned over my compost - they aren't there. I've been digging around my garden for several weeks now and no sign of the little buggers. Is it a cause of the drought? Has anyone else noticed this in their garden? |
#2
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Where have all the earthworms gone????
On Sat, 19 Apr 2003 08:50:38 GMT, "J. Morrow"
wrote: Hmmm... some people lose their house keys, I lose all the earth worms. They seem to have completely disappeared from my garden. I turned over my compost - they aren't there. I've been digging around my garden for several weeks now and no sign of the little buggers. Is it a cause of the drought? Has anyone else noticed this in their garden? I've noticed the same thing in my vegetable garden for some time now. I just moved some material I have in a heap for mulching today, and expected to see worms at the bottom of the heap where there was a layer of compost from the last heap, but no. I also havn't seen many bees in the garden this year. Trevor |
#3
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Where have all the earthworms gone????
"J. Morrow" wrote in message
... Hmmm... some people lose their house keys, I lose all the earth worms. They seem to have completely disappeared from my garden. I turned over my compost - they aren't there. I've been digging around my garden for several weeks now and no sign of the little buggers. Is it a cause of the drought? Has anyone else noticed this in their garden? I noticed the same, both here (sandy soil) and at work (heavy clay at worst). A lack of worms and even a lack of black beetle larvae. Both were common. This was last year, but since plenty of rain they are back in abundance. My only guess is that they go deeper when the ground is dry, therefore out of our normal reach. -- Remove "not" from start of email address to reply |
#4
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Where have all the earthworms gone????
"Andrew G" wrote in message ...
"J. Morrow" wrote in message ... Hmmm... some people lose their house keys, I lose all the earth worms. They seem to have completely disappeared from my garden. I turned over my compost - they aren't there. I've been digging around my garden for several weeks now and no sign of the little buggers. Is it a cause of the drought? Has anyone else noticed this in their garden? I noticed the same, both here (sandy soil) and at work (heavy clay at worst). A lack of worms and even a lack of black beetle larvae. Both were common. This was last year, but since plenty of rain they are back in abundance. My only guess is that they go deeper when the ground is dry, therefore out of our normal reach. I think that is what happens. If the drought is more severe they would probably die but their eggs left behind would hatch when the grond moisture levels reach the appropriate level. |
#6
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Where have all the earthworms gone????
the comment about eggs sent me to google for a bit more info here is an
interesting summary for anyone intrested: "Reproduction in Earthworms Oligochaetes are hermaphrodites, with separate testis and ovaries. The sexual organs, and the ducts that to and from them are situated in the anterior (front) part of the animal, normally between segments 7 and 15. The actual placement of the reproductive organs, including the openings of the ducts, which are nnormallyaly on the same segments are important in classification. In Lumbricuscus terrestris, a common worm in Western Europe, the testis are in segments 10 and 11, the seminal vesicles in segments 9,11, and 12, while the vas deferens opens on segment 15. The ovaries are found in segments 13 and the oviduct opens on segment 14. The sexual organs and their ducts are paired, one on each side of the worms body. Sperm travels from the opening of the vas deferens to the clitellum, segments 32-36, along two seminal grooves. Copulation occurs on warm damp nights. the worms lie had to tail and side by side. In this way the clitellum segments of each animal are opposite the segments containing the sexual organs of the other. The clitella secrete a mucous tube that surrounds the worm from before the first reproductive segment to the clitella segments (segments 8 to 36 in L. terrestris). Sperm received from the partner worm is stored in the spermathecal openings (segment 9 in L. terrestris) and then the two worms separate. Each worm now secretes a new mucous tube, one that is enriched with albumin from the clitellum and wrapped in membranene. The eggs (5 - 16 in L. terrestris) are shed into this tube along with some sperm. the worm then backs out of the tube which now becomes an egg cocoon. Fertilisation occurs inside the cocoon. The cocoon is left under the ground, or attached to plants under the water and often changes shape, becoming darker, smaller and harder. In L. terrestris only one egg survives the juvenile stage to emerge from the cocoon, but in other species more than one will survive. The exact detail vary from species to species but the general pattern remains the same. " taken from: http://www.earthlife.net/inverts/oligochaeta.html |
#7
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Where have all the earthworms gone????
Actually come to think about it. When I moved into my current home back in
1990, we couldn't find any worms anywhere for 3 years. We blamed it on the heavy clay soil and the black plastic covering that was placed deep inside the soil when the house was built in 1980. We bought worms from the local gardening shop, I even transplanted a white earthworm I found in another friend's home, and things seem to improve. Last year I dug an irrigation trench (to drain off water in the courtyard) and found to my happiness that I had earthworms were deep inside my garden soil, despite the clay. Hope the silly buggers don't get caught in the trench. If I don't find any worms, I'll go and buy some at the gardeningshop again. |
#8
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Where have all the earthworms gone????
On Mon, 21 Apr 2003 16:51:04 GMT, "J. Morrow"
wrote: snip If I don't find any worms, I'll go and buy some at the gardeningshop again. Something in the back of my mind says that composting worms (eg tigers) cannot survive in garden soil, and earthworms cannot survive in compost unless there is a certain amount of soil to go through their gut. I just throw everything I can find, and a bit of soil into cut off corrugated iron tanks, and I seem to have plenty of both sorts in there - but I have never found a tiger in the actual garden. |
#9
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Where have all the earthworms gone????
Linda, This sounds weird but I've foudn tiger compost worms burrowing into
logs that have been sitting on the ground. |
#10
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Where have all the earthworms gone????
Hi!
There are wormlike slimy predators that eat earth worms. They can really reduce worm numbers. Also tiger worms don't thrive in the cold! Alan you said:- snip------ Something in the back of my mind says that composting worms (eg tigers) cannot survive in garden soil, and earthworms cannot survive in compost unless there is a certain amount of soil to go through their gut. I just throw everything I can find, and a bit of soil into cut off corrugated iron tanks, and I seem to have plenty of both sorts in there - but I have never found a tiger in the actual garden. |
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