40) WHITE FLIES INJURIOUS TO CITRUS IN FLORIDA. 
16° above zero at Lake City, between January 26 and January 29, 
1905, failed to defoliate cape jessamine. 
Except where grown for commercial purposes, as is the case at 
Alvin, Tex., where the blooms are shipped to northern markets, or 
where grown in nurseries, cape jessamines have not been observed 
growing in suflicient abundance to materially affect near-by citrus 
trees in sections where the white fly is already established. If over- 
looked in connection with the fumigation of citrus groves or defolia- 
tion of citrus trees by cold, cape jessamines might become a serious 
hindrance in the control of the white fly. The greatest economic 
importance of the cape jessamine as a food plant lies in the great dan- 
ger it presents as a distributer of the white fly. This will be referred 
to again under the subject of methods of spread. 
The subject of the adoption of the cape jessamine by the citrus 
white fly is not of sufficient importance to have been given more 
than incidental consideration. In general the degree of adoption 
seems to be less than is the case with the umbrella and China trees. 
On November 17, 1907, an examination made of 30 leaves picked at 
random from both old-and new growth of a cape jessamine which 
appeared to be in an ordinary condition of infestation as observed 
when growing hear infested citrus trees showed that there existed an 
average of 45.1 forms per leaf. 
The extensive growth of cape jessamines, or gardenias, as the 
blooms are sometimes called, for commercial purposes is known to 
the authors and occasions a conflict of interests only in Alvin, Tex. 
From the orange grower’s standpoint this, at the most, applies to a 
location adjoining an orange grove where the citrus white fly is uncon- 
trolled. Fortunately, however, for the citrus growers, it is of great 
importance to the success of the florist’s business that the white fly 
be kept in subjection in gardenias. 
PRIVET HEDGES. 
Privet hedges are not uncommon in citrus-growing sections, and 
heavy infestations by the citrus white fly occur in parts of Georgia 
and South Carolina, where no citrus trees are grown. As a food 
plant the privets are of economic interest in the same respects as is 
the cape jessamine, but they are more extensively grown and of pro- 
portionally greater importance. No studies have been made of the 
degree of adaptation and attractiveness, but the several species of 
privet observed in infested localities have shown the propriety of 
classing them with citrus, China trees, umbrella China trees, cape 
jessamine, and other preferred food plants. The senior author ob- 
served a migration of adults from privet hedges in Victoria, Tex., in 
the summer of 1904, which indicated that a hedge of this material 
