THE PIGEOX PEA: CULTURE IX HAWAII. 23 
infested with the pest, As the scale matures it gives to the sur- 
rounding surface of the stem the striking appearance of a fungus 
affection. In a very dry season, for example, such as that experi- 
enced in Hawaii during the summer of 1920, the plants, which were 
severely infested, succumb. However, when the first rains came, 
most of the infested plants revived and again produced a normal 
amount of foliage and pods. During the dry season it is recom- 
mended that the infested plant areas be grubbed up and the brush 
burned. It is possible, however, that, by cutting the plants, burning 
the cut portions, and spraying the stubble with a scale oil, beneficial 
results can be secured and the stand can be saved. 
One pest of the pigeon pea, well known because of its prevalence 
wherever the plant grows, is the bean-pod borer, the larvae of the 
common blue butterfly {Lyccena hoetica). This pest lays its eggs 
on the outer parts of the flower or leaves, and the emerging larvae 
attack the growing seed within the pods. Only when a few plants 
are grown in a place has this pest been found troublesome. In none 
of the extensive plantings have any depredations by this pest been 
noticed. 
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