Arizona republican., 1910-11-18

: This quarantine prohibits shipments of any of these white fly food plants from Georgia, South Carolina. Florida, Ala
 bama, Mississippi, Louisiana and Texas and from Yuba and Butte counties in California.
 While the white flies are found eX clusively on leaves, the experience of the past year has cOnclusively proven that it is unsafe to rely upon requiring shippers to defoliate completely all cit rus and other favorite food plants from the localities where the white fly eX- ists," said pr. A. w Morrill,. territorial entomologist. last night "A single leaf overlooked by the inspectors might be the means of introducing the pests into Arizona. once well established this pest, in the course of a few months, would multiply and spread beyond pos sibility of eradication. White flies have an advantage over mealy bugs and Oth- CT scale insects in that they are pro- vided with wings in both sexes of the adult stage. They are known to travel by wing for more than a mile. They multiply on china and umbrella trees to such an extent that single trees ire quently produce from twenty to fifty million insects During the summer season, when the adults are migrating from the china trees to citrus trees and groves they fill the air so as to cause considerable annoyance"
 Dr. Morrill, referred to the following clipping from the Tampa (Florida) Tribune of August -, 1910, as an illus tration. In Tampa china trees are no more numerous than in Phoenix. The clipping follows:
 For the past several days the flies have been so thick in the atmosphere during the late afternoon and early evening in some sections of the city that a person could hardly breathe. They got into the eyes and mouth while riding on cars or in autOmo- piles. Many Tampans have not known what they were and have wondered what caused the thick cloud which GOV cred them like light snow. There must be billions of the insects within the city
 Tt is agreed that the time has ar rived for action and that something should be done without delay. The city affords a good breeding place for them on account of the different trees and different kinds of foliage which it affords The insect has Q fine ground on which to grow and develop. It is declared that china trees, frequent in Tampa, form fine breeding places for them, and orange growers advocate the cutting down of all china trees
 The circumstances connected with the recent occurrence of white flies in a section of California having summers as hot as the salt river valley and with even less rainfall leaves no reasonable doubt that these insects can thrive in Arizona, or anywhere that orange can be grown" continued Dr. Merrill. The White fly has been spreading rapidly in Florida during the past few years and there is now no section of that state entirely free from the pest. Ship ments of nursery stock from Florida have become correspondingly more dangerous.
 Two counties in California have been found apparently free from in festatiOn after frequent and careful in- spections during the last three years. following the attempt to eXterminate white flies under the direction of the state commission of Horticulture. The failure of the inspectors to find any of
 the insects after such an attempt to