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Transcription
Pearson - 1995
23
Bamboo
October 31.- Clump A2 on Cerro Otto had 23 dead shoots, 22
of which were parasitized by the spiral larva. 16
yearling culms over lm, 3 of which had dead tops. A
spherical Dromiciops nest was lying on the ground next
to the clump. The nest was entirely bamboo leaves, no
softer lining as in bird nests.
Clump Al out in the open had 4 dead shoots; 2 of
them with a strait furrow dug into it, 1 with spiral
eating, and one not visibly parasitized. There were
17 yearling culms >lm. One tall one was broken off,
another tall one seems to have been bitten off. I
could not see incisor marks, however.
A GPS reading about 100 m down hill from A2 (east)
was 41*08.82,71*20.51, 1100m, 2.99km 065* from
Bariloche Civic Center.
November 1.- Llao Llao Peninsula. At our marked clump there
were 11 living yearlings, 3 of them tall and very
skinny. There were 25 dead shoots, 18 of them clearly
eaten by larvae. Unlike Cerro Otto, many of these had
straight vertical furrows rather than spiral furrows
as at Otto. One 1-inch-diameter cane in our marked
clump was broken off (a long split), and a big
straight furrow went up the center of the culm.
Location of this clump: 41*03.44, 71*33.82, 23.0km
112* to Bariloche.
November 4.- La Veranada. Nire leaves just coming out, no
new bamboo shoots up yet. Clump E2 location is
41*30.00, 71*27.86, 42.4km to Bariloche 018*. The
clump looks just the same, 12 dead shoots, 9 of them
parasitized, many of these with vertical furrows
rather than spiral. 19 yearlings, 10 of them very
skinny, one of them with a dead top not parasitized,
another of them broken off at the base but no
toothmarks. No new shoots yet.
Clump E3 looked the same. 18 yearlings (2 of them
skinny), 121 dead shoots, 100 of them clearly
parasitized while they were still living (spiral
tunneling, exit hole, etc.), 3 of them looking as
though they had been bitten off near the base. Most of
the tracks were spiral, unlike the dead shoots nearby
at E2. [Insert: visited this clump on December 3 and
found one more dead shoot, paratizized]. No new