TWENTY-NINTH FRUIT-GROWERS' CONVENTION. 



159 



Apricot Scale — EuUcanium {Lecaninm) armeniacum, Craw. 

 Frosted Scale ) „ , . , ^ . , . ^ 

 Prune Sc'\le \ Eulecanmm {Lecamum) prnmosum, Ooq. 



Red Scale — Chri/somphahis {Aspidiotus) aurantii, Mask. 

 Yellow Scale — ChrysomphaJus {Aspidiohis) aurantii citrimis, Coq. 

 San Jos^ Scale — Aspidiotus perniciosus, Comst. 

 Oleander Scale / ..on 

 Lemon-Peel Scale f ^^P'^'otus hederx (neni), Sail. 



Greedy Scale — Aspidiotus rapax, Comst. 



Purple Scale — Lepidosaphes {Aspidiotus) heckii (citricola), Newm. 

 Glover's Scale — Lepidosaphes {Aspidiotus^ glorerii, Pack. 

 Rose Scale — Aulacaspis {Diaspis) rosct', Boucli^. 



NEW OBSERVATIONS ON THE CODLING-MOTH. 



By prof. C. W. WOODWORTH, of Berkeley. 



During the past summer quite extensive operations have been under 

 way in the Pajaro Valley for the control of the codling-moth. These 

 •activities were brought about by the action of the Pajaro Valley Orchard 

 Association, which obtained from the Supervisors of Santa Cruz and 

 Monterey counties an appropriation amounting to $2,500; Santa Cruz 

 County subsequently made a second appropriation of $250, and these 

 amounts were supplemented by the further sum of $175 subscribed by 

 individual orchardists. This, money was placed under the control of 

 the Experimei}t Station to pay the expenses of conducting an exhaustive 

 study of this insect. The desire was expressed that this work should 

 include a careful testing of all the various means that have been sug- 

 gested for the control of this insect, and in order that this might be 

 done on a large scale many of the growers about AVatsonville placed the 

 spraying operations of their orchards under the control of the investi- 

 gation. Our purpose was to so arrange the work that we could give 

 quite definite directions for the control of the insects another season. At 

 the same time it was desired to accomplish as much as possible during the 

 current season in the control of the pest, without, however, sacrificing 

 the experimental work. 



The work was under the immediate control of my first assistant, Mr. 

 Clarke, and several advanced students from the Entomological Depart- 

 ment also rendered valuable aid. The mass of data accumulated as a 

 result of this work is too large to present at this time, but will be given 

 in detail in bulletins to be issued by the Experiment Station. I will 

 only attempt to detail a few observations upon this insect which are 

 among the more important additions to our knowledge of the habits of 

 the insect. No insect has been studied more extensively and exhaust- 

 ively than the codling-moth, but it appears that we are still far from 

 knowing the insect as intimately as would be desired. One point in its 

 life history which remained for a long time entirely unknown, was the 



