PROCEEDINGS OF THIRTY-THIRD FRUIT-GROWERS ' CONVENTION. 143 



even for a single moment, that that man up a tree comes down smiling 

 and asks you into the house to have a nice cool lemonade ! 



Looking back on the thousands of trees, plants, and shrubs that were 

 Hterally swarming with white flies in the spring, and considering the 

 great amount of territory covered, the obstacles met and overcome, the 

 unfavorable season of the year in which the work was attempted, with 

 all conditions seemingly against success, when we had to proceed very 

 cautiously with the work, ever trying to rush it to completion in the 

 specified time, and to have succeeded so far that to-day it is nearly 

 impossible to find the pest here, I believe the work at Marysville so far 

 has been attended with a fair degree of success and that the main object 

 has been achieved, and that by spring the pest should be exterminated. 



Bakers field. — The white fly invasion at Bakersfield presented an 

 entirely different case. There, we had but a single owner to deal with, 

 Mr. William Tevis, The infestation occurred on his beautiful estate 

 at Stockdale, which is situated about five miles from Bakersfield, and 

 practically surrounded by pasture land, and the chances of the pest 

 spreading quite small. Upon discovery of the pest, the place was im- 

 mediately quarantined and all persons kept out. The owner was more 

 than anxious to do everything in his power to assist in the eradication 

 work and placed every convenience at the disposal of the authorities. 

 Considerable experimenting was done at this place, as the conditions 

 were ideal. With the cooperation of the southern commissioners a 

 fumigation outfit was rushed to the scene of infestation and hydrocyanic 

 acid gas was used, in different strengths, exposures, and doses. Trees 

 that were necessary to be defoliated were first used for experimental 

 purposes and the foliage burned, dropped or left in perfect condition. 

 Different strengths were used on the insects and a plan outlined for the 

 trees, fumigated and left standing, for trap purposes, which consisted 

 of refumigation and inspection until final work during the winter 

 months. 



Repeated examinations at this point of infestation show excellent 

 results and the white fly in the past tense ; however, the inspection and 

 final treatment of the trees will be carried on as a safeguard, just 

 the same as if the pest could still be found. 



Oroville. — The invasion of the white fly at Oroville presents about the 

 same conditions as it did at Marysville, being scattered over the city 

 trees. The varieties of these trees are principally seedling, with quite 

 a percentage of Navels. Our experiments at Bakersfield have made 

 possible the intelligent use of fumigation with hydrocyanic acid gas 

 against this pest, and the option will be given the owners to fumigate or 

 defoliate— outside the infested area. There will hardly be the trouble 

 experienced at this point as previously encountered, for the Marysville 

 campaign has been an education in this line and the anxiety of the 



