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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION 



harder portions of the knots are thoroughly perforated with the 

 burrows (fig. 13) made by the caterpillars. It does not appear to 

 attack any other parts of the trees. The caterpillars are whitish 

 and about one inch long. They are quite abundant, but so far no 

 adults have been reared to determine the species. 



Fig. 11. The greedy scale, Aspidiotus camelliae Sign., on old olive suckers. 

 The smut fungus which partially conceals the scales is from black scale on the 

 same tree. (Original.) 



(Photo by Div. Sci. Illust., Univ. Calif.) 



SOME OF THE PRINCIPAL INSECTS ATTACKING THE OLIVE TREES IN OTHER 

 STATES AND FOREIGN COUNTRIES 



There are but few olives grown in other states of this country, 

 consequently the list of pests on them is very short. In a number of 

 foreign countries, however, and particularly in the Mediterranean 

 region, where the olive has been growing for ages, the number of 

 recorded pests is quite large. Among the many there are but few 

 serious enough to warrant control measures. In the following list 



