TWENTY-EIGHTH FRUIT-GROWERS' CONVENTION. 



157 



PROFESSOR WOODWORTH. We have just undertaken the investi- 

 gation in the Pajaro Valley, so as yet we have no results to show. The 

 record of last year, according to their own estimate, is that they lost 

 50 per cent. It is possible, of course, that this estimate was somewhat 

 overestimated; that it may not have been so heavy. But still it was a 

 loss of a great many thousands of carloads, I should judge, from the 

 way they are telling me of the loss of hundreds of carloads at one place 

 .and another. Anyway, we estimate that the loss was a half million 

 of dollars. We have undertaken the investigation under very favorable 

 auspices. I hope that at the end of the season we will be able to show 

 some very practical results. The amount of spraying that is being done 

 in that valley now is, I guess, tenfold greater than in previous years. 

 There are now some fourteen power outfits, and the valley is not over 

 ten miles in any direction from Watsonville. Perhaps half of the valley 

 is not yet in bearing. 



MR. BERWICK. How often do they spray? 



PROFESSOR WOODWORTH. Some places once and some ten 

 times. At the end of the year we will tell you what is the most practical 

 and when you can safely leave off spraying. No one knows now when 

 we can. It probably differs very greatly in different localities. I have 

 no doubt that the programme which will finally be decided upon for the 

 .Pajaro Valley would be essentially different from what would be 

 practical in Fresno or Sacramento regions. 



MR. BERWICK. Have you found, so far, any parasite preying on 

 the codling-moth or its pupa? 



PROFESSOR WOODWORTH. Not to amount to anything. 



MR. STONE. What spray is used? 



PROFESSOR WOODWORTH. As to the spray that is mainly used 

 up there, they are all arsenides, of course. Paris green is used to a. 

 larger extent than any other. But we are -experimenting w T ith all the 

 arsenides — of lead and lime and so on. 



MR. KRAMER. What effect does spraying have on trees in bloom? 



PROFESSOR WOODWORTH. I will say that so far as we can see 

 now those that were sprayed when in bloom have shown no bad effects. 

 But we can not tell for certain until after a little more time has elapsed. 



MR. KRAMER. Don't the moths lay their eggs in the bloom? 



PROFESSOR WOODWORTH. I am certain they do not. No one 

 has seen the egg of the first generation, so far as I am aw T are; but in 

 later generations the moths certainly lay their eggs on smooth surfaces. 

 And the bloom is thoroughly woolly. I can not think they lay their 

 eggs in the bloom. . 



A MEMBER. What do you find in regard to the quality of paris 

 green this year in the market? 



PROFESSOR WOODWORTH. There has not been any bad paris 

 ; green in the Watsonville market this year. 



