1058 EXPERIMENT STATION RECORD. 



The Avhito fl}' {Aleurodes citrl) Avas unu.siuilly injurious during- the 

 pa.st year. The author recom mended the use of resin wash to the fruit 

 growers and received favoral)le reports concerning- its efi'ectiveness. 



A number of experiments in fumigating with hydroc\'anic-acid gas 

 indicated tliat the white fly, red spider, and other insects were success- 

 fully killed by this method, but the author believes that the heavy 

 dews of Florida Avill render tJie fumigation method more difficult than 

 in California. 



The cotton}' cushion scale is reported as having Ijeen prej^ed upon 

 extensively by the caterpillar of LcetlUa coccldlvora. The scale was 

 nearly exterminated by the agency of this caterpillar in some locali- 

 ties. A fungus disease was observed to cause the destruction of about 

 95 per cent of the scales in a few localities. The fungus parasite has 

 not been studied and its relationship is not understood. 



Attempts which were made in colonizing- the Australian lady ])ug 

 were without marked success. Brief notes are also presented on a 

 number of scale insects and upon the pickle Avorm, melon borer, 

 cucumber beetle, bollworm, and other injurious insects. 



Report of the Illinois State entomologist concerning operations 

 under the horticultural inspection act, S. A. Forbes {S2>i'!ii<jjirl<l^ 

 lU'niois: I'JtHIip.s Jjros., IDOO^ pV- ^^)- — The duties of the entomolo- 

 gist as prescril)ed under the horticubural inspection act fall under the 

 two heads of nurser}- inspection and insecticide treatment of orchards 

 and other propert}'. During the first annual inspection the State was 

 divided into 4 districts and an inspector was assigned to each district. 

 The total number of premises inspected during the lirst 3'ear was 275. 

 In only one case was a certificate refused to the owner of a nursery, 

 and this was on account of San Jose scale being found on the trees left 

 over from the sales of preceding j^ears. The salaries and expenses of 

 inspectors are charged against the nurserymen who receive their serv- 

 ices. The average charge for the first year's work Avas $5. 77, and for 

 the second year's Avork, $8.74. 



The Avooll}^ aphis was found in considerable numl)ers in (!i of the 

 nurseries Avhich were inspected. Brief notes are given on the root rot 

 of apple and on the peach-tree borer. The disease known as crown 

 gall was found in 52 nurseries. San Jose scale has been dctecti>d in 

 6 imrseries within the limits of the State, but has subsequently been 

 exterminated in all except one. The number of localities in the State 

 at which San Jose scale has been found amounts to 44, but the scale 

 was subsequently exterminated in 10 of these places. In the majority 

 of cases specimens Avhich Avere sent in under the suspicion of ))eing the 

 San Jose scale proved to be the scurfy scale. Insecticide treatments 

 against the San Jose scale include spraying Avith whale-oil soap, 2 

 lbs. to the gallon of Avater, kerosene in a mechanical mixture with 

 water, and fumigation Avith hydrocyanic-acid gas. The kerosene enml- 

 sion Avas diluted so as to contain 17 ])('r cent of the oil. The general 



