Part III.] Beeson: Beehole Borer of Teak. 
11 
In 1918 Mr. F. A. Wrigley, in charge of Messrs Steel Brothers’ 
extractions in Indawgyi Range, furnished the Conservator of Forests, 
Northern Circle, with the following facts regarding the occurrence of 
the beehole borer, based on 21,000 girdlings. 
Name of forest 
coupe. 
Type of forest. 
.. 
Incidence of 
borer. 
Remarks. 
Nanyinka, Coupe 1, 
1500-1600 gird¬ 
lings. 
(a) Practically pure 
teak occupying 
grassy flats round 
Lake Indawgyi. 
(a) Free from 
beehole. 
(a) Undergrowth of 
heavy Kaing 
grass, subject 
to violent annual 
fires. 
(6) Moist ever-green 
forest containing 
scattered teak on 
flattish ground. 
(6) Very badly 
beeholed. 
(6) Ever-green under 
growth, so damp 
thdt leeches 
exist in it perenni¬ 
ally : never subject 
to fire. 
(c) As for (6) but on 
hill slopes. 
(c) The incidence 
of the beehole 
varies directly 
with the eleva¬ 
tion, i.e ., the 
higher the eleva¬ 
tion, the less the 
beehole attack. 
(c) Owing to damp 
mists over the 
lake, practically in¬ 
combustible on 
lower slopes. Bam¬ 
boos on higher 
slopes. 
Coupe II. Unclassed 
forest west of 
lake, 3,000 gird¬ 
lings. 
Open kaing forest 
containing clumps 
of pure teak, and 
much scattered 
cultivation. 
Free from beehole. 
Subject to annual 
fires. 
Coupe III. 2,000 
girdlings. 
Contains the 3 
classes described 
in coupe I. 
Similar to coupe I 
Coupe IX. Dagwin 
Chaung, 200 gird¬ 
lings. 
Practically pure teak 
Free from bee-hole. 
The trees are mature 
and the area was 
fire protected for 
only about 10 
years. 
N.B .—*’ Free from beehole ” means that no single log is classified by the firm as 
a beeholed log. 
Mr. Wrigley emphasises the fact that, in areas in which patches 
of ever-green forest adjoin patches of pure teak growing in heavy kaing 
grass, the beehole borer is invariably confined to the teak in the ever¬ 
green, while the pure clumps are immune. [C. F., N. C., 1919.] 
[ 239 ] 
