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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION 



or maggots live until mature. The work of the maggots results in 

 the premature dropping of the fruit and a diminution in the yield of 

 oil. Considerable money is spent annually by the olive growers in 

 the control of this pest. 



20. The olive tinea, Prays oleellus (Fab.) (fig. 20). This small 

 moth is quite a serious pest in southern Europe and of less impor- 

 tance in Palestine. The caterpillars feed upon the buds, blossoms, 

 and in the seeds of the fruit causing much loss in many cases. It is 

 probably second in importance to the olive fly. 



Fig. 21. The leopard moth, Zeuzera pyrina (Linn.). Adult female, caterpillars 

 and chrysalis. Natural size. (After Britton.) 



21. The leopard moth, Zeuzera pyrina (Linn.) (fig. 21)- Tne 

 caterpillars of this moth bore large galleries into the wood of perfectly 

 sound and healthy trees and do considerable damage to olive trees in 

 southern Europe, especially in Italy. It is reported as the most 

 serious olive pest in Palestine. It also occurs in northern and south- 

 ern Africa and in Korea, Japan, and along the Atlantic seaboard from 

 Massachusetts to the southern part of New Jersey. The insect is a 

 very destructive pest to a large number of shade and forest trees, as 

 well as to such cultivated fruits as apple, cherry, currant, pear, plum, 

 and walnut. It is an insect that we might well take extra precautions 

 to keep out of California by quarantine or other measures. 17 



IT See Farmers' Bull. 708, U. S. Dept. Agr., Feb., 1916, Howard and Chitten- 

 den, and Bull. 169, Conn. Agr. Exp. Sta., Nov., 1911, by Britton and Cromie. 



