473 



Smith (H. S.). The Alfalfa Weevil— Mthh/. Bull. Cal. State Commiss. 

 Hortic, Sacramento, vi, no. 7, July 19i7, pp. 295-297, 3 figs. 



Lucerne is California's most valuable forage crop, and it is therefore 

 essential to protect it against Hyper a variabilis {Phytononius posticus), 

 which is the most destructive pest of lucerne in the United States. 

 A strict quarantine is therefore maintained. The distribution of the 

 weevil in the States is given, with a description of the life-history and 

 habits and the methods of control which have been advocated in 

 other States. \ 



Berger (E. W.). Whiteflies of Citrus. — MtJily. Bull. Cal. State Commiss. 

 Hortic, Sacramento, vi, no. 7, July 1917, pp. 298-307, 9 figs. 



This paper gives a brief account of the species of whiteflies known 

 in Florida and the measures adopted against them. The most 

 effective control has been found to be by means of fungus para- 

 sites, the preparation of pure fungus cultures for spraying purposes 

 being described. Directions for spraying with oil emulsions and soap 

 solutions are given. A comprehensive list of the whiteflies infesting 

 citrus in different parts of the world is given, of which nine species 

 are present in the United States, four having been introduced and 

 five being native. This list contains no new species other than those 

 previously recorded [see this Review, Ser. A, iv, p. 387]. 



Maskew (F.). The Melon Fly {Dacus cucurhitae, Coq.). — Mthly. Bull. 

 Cal. Stale Commiss. Hortic. Sacramento, vi, no. 7, July 1917, 

 pp. 307-309, 3 figs. 



Dacus cucurhitae, Coq., has not as yet been recorded in California, 

 though it is constantly being intercepted by quarantine officers at the 

 port of entry. Under a State quarantine order no food- plants of 

 the melon fly may be imported into California from Hawaii, and 

 any such plants brought in are immediately destroyed. 



HoYT (A. S.). The Mexican Orange Maggot {Trypeta ludens).' — 

 Mthly. Bull. Cal. State Commiss. Hortic, Sacramento, vi, no. 7, 

 Jully 1917, pp, 309-311, 1 fig. 



Trypeta ludens is said to be such a serious pest of oranges in 

 Mexico that in some localities orange-growing has been abandoned, 

 while the mango crop in infested districts is reduced to about 

 one-fifth of its normal dimensions. Other fruits attacked are grape- 

 fruit, sweet limes, peaches, plums, Acliras sapota and guavas. The 

 complete life-cycle of the fly occupies about three months, thus 

 permitting of four broods annually. Eggs are deposited within the 

 fruit, whence the full-grown maggot emerges and pupates in the 

 ground. In 30 to 46 days the adults emerge. The control of this 

 fruit-fly in Mexico is a serious problem. The best results have been 

 obtained so far with a sweet poison spray to destroy the adults, while 

 all fallen fruit should be collected regularly and buried or burnt to 

 destroy the larvae. This, however, during the season, would be an 

 almost endless task. Quarantine measures in California have been 

 successful in protecting the State from importations of the insect. 



