Part III.] Beeson: Beehole Borer of Teak. 
other hand the borer appears at a very early stage (attack on one year- 
old trees is recorded) and may occur locally in large numbers. “ The 
increased incidence is always very localised ; in one and the same year 
the pest may be abundant in one place, and totally absent in another, 
whilst in the following year it may be just the reverse . 
Even a local increase is usually narrowly limited. Thus, within exten¬ 
sive plantations, 1 or \ hectare may be badly attacked, while the re¬ 
mainder is immune,” [p. 13]. Commenting on the annual incidence 
data for Burma supplied by the writer Beekman notes that these, if 
applicable to Java as well, would cause some anxiety (indien zij ook voor 
Java zouden gelden, den schrik om het hart zouden doen slaan). 
Teak occurs in Java on undulating ground up to about 2,000 feet 
in remarkably rich crops. The purity of the species varies from 
about 50 to 99 per cent.; the natural regeneration is excellent and 
bamboos are absent; the rainfall is over 70 inches. The forests are 
treated by clear-felling and artificial or natural regeneration including 
coppice or a combination of both (Milward). 
The conditions are such as are, at present, considered in Burma to 
characterise a bad beehole area. It appears not improbable that the 
relative abundance of the borer in moist pure forests is more a mat-ter 
of opinion than of fact. 
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