66 
Indian Forest Records. 
[Vol. VIII 
The data in the above table are so arranged as to obtain a comparison 
of the attack on young trees and the attack on old trees. Both groups 
show similar annual fluctuations and in this the plantation trees also 
agree. The intensity of annual attack on the older trees does not 
increase with age but on the contrary shows periodic increases and 
decreases, the maxima of which are slightly more than the maxima 
in the younger trees and in the plantation. The sudden recrudescence 
in 1895 is rather striking, and may be connected with the fellings in 1891- 
92 or with the commencement of fire-protection in 1895. 
The vertical distribution of beeholes in this area is discussed on 
pp. 98, 99 and shown in Table 35 and Diagram 3. 
In other parts of Mohnyin Reserve plantations made in the last 
10 or 15 years are badly infested by the borer. A mixed plantation 
made in 1914 of Teak, Gmelina arborea, Bursera serrata, Cedrela Toona 
and other species in rows, was especially examined for beehole borer. 
Although teak in many places has been ousted by the other species in 
the mixture, and is not numerically abundant, it is severely attacked, 
and appears to have derived no protection from the presence of other 
tree species. 
4. Plantation No. 2 of 1897, Petsut Reserve. 
1 . Description of Sample Plot. 
In a plantation of 12*0 acres, on a gentle slope of south aspect in 
hilly country ; soil a strong loam, free from stones. Growth very vari¬ 
able, on the lower slopes good and well-stocked but in places higher up 
the slope very poor and much suppressed. 
Undergrowth .—Very variable, in places dense clumps of Bambusa 
Tulda and climbers, elsewhere a low underwood of small shrubs. Sample 
trees were chosen with particular reference to undergrowth and detailed 
notes are given below. 
Past History. —Light thinning in August, 1904 ; thinning in February, 
1907, August, 1912 and December, 1916. With regard to fires, Mr. 
A. W. Moodie, d. f. o., informs me that in 1899 a fire occurred over half 
the area burning back the young plants. In 1914-15 the forest near 
the plantation was burnt and it is extremely probable that the plantation 
was also affected. With the exception of the fires the whole reserve was 
fire-protected from 1897-1914, and the plantations up to 1914-15. From 
1914-15 to 1916-17 fire protection was abandoned, and fires almost 
certainly occurred in the area. From 1917-18 to date early departmental 
burning has been carried out. 
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