208 ; THE PLUM CURCULIO. 
SOME RESULTS OF SPRAYING PEACHES FOR THE CURCULIO. 
In the following tables some results of spraying peaches for the 
curculio are presented. The benefits are seen to vary from season 
to season, as in the case of the apple, depending upon the abundance 
of the insects. On account of the difficulty of taking note of punc- 
tures in the fuzzy peaches, the results are based on records of actual 
infestation of fruit by larve or indications of the presence of the 
latter. The results obtained by this metnod of computation on the 
different plats should be entirely comparable. Examinations were 
made of all drop fruit during the season, as well as of the ripe fruit 
at picking time. One of the most important results in spraying for 
the curculio is the reduction of brown rot. The punctures of the 
curculio in the fruit form an easy point of infection, and very notable 
benefits in the reduction of brown rot may be observed in orchards 
sprayed only for the curculio. 
In Table CII are given results of spraying of peaches in 1906 on 
the Arlington Farm, Va. The orchard used contained about 500 trees 
and was an isolated one, but adjacent to a thick growth of young 
trees and bushes. Not all of the trees were treated, each plat con- 
taining some 50 trees. The applications were made on the dates 
indicated in the table. It was also thought desirable to determine 
the possible benefit of spraying the trees heavily with simply lime- 
water, inasmuch as this method of curculio control has been some- 
what exploited. 
Tasie CII.—Results of spraying peaches for the plum curculio, Arlington Farm, Va., 
1906. 
Fruit from | Fr *t from =. a 
ground. re, ‘etal eel Per awe 
Total) num- dontaccoee 
Plat Tree oe ~ | | mum-| ber of) oF 8° percent 
No. Treatment. Nove. eee es In- | ber of] fruit | ong | age of 
To- O- | fest | fruit. |infest- : sound 
tal. | fest} tar. | 7es fruit. : 
at. | ed. ed ed. fruit. 
ne 6 | > ‘ = 
I.....| Three applications, 2 pounds arse- |{ |, 773 ees 14 |1, 217 21) 98.27 |.......- 
r pa Sr ars 211,067} 35] 67 7 | 741 ||. .d9u)), SO7 58) eeee ean 
nate of lead to 50 gallons water, Rie ¢ : 7 4 
: es 3} 646 93° | 220 8 | 866 BL |’ 496742) Sees 
plus 3 pounds stone lime: Apr. ate = 2 o 
57: May 8 and 20 4) 743)|' 4 |r B50.) 21,0031) altel POR neg a ae 
Seep ; 5| 423| 74] 179 9 | 602) “S3" |" Belair eaeeeeee 
3,652 | 143 |1,867 45 |5,519 1634) See ee 6. 59 
1} 393 37 Soilecesece 476 of | 92022 [oso oees 
II....| Three applications, whitewash lime 2] 309 56] 254 12) -563 680 87590 serene ee 
15 pounds to 50 gallons water: 3} 419 | 118] 136 18) 555: |)" 136) || 7o.40"|Pece ones 
Apr. 27; May § and 20. 4| 554 7 345 30; 899 109) 6875.87) | eee 
5 548 78 250 9 798 | 87 | 89.09 |-------- 
a al 
2,223 | 368 1,068} 69 3.291] 437 |......-. 36.72 
| 1 374 1933) Se ca=||(SSas sc 374 108 Cll Seen 
| 2 243 64 | 336 22|| 57 865) © (85: 14 ee =e 
TL... | WU npreated)...2.-seeteeeem aes eee: 3 | 201 | PI Bees acioae 201 4) AGG) saeeeaee 
4 440 140 118 ilit 558 151 M2 Ot ae ee ees 
5 | 8380] 234 70 2: || 900.) "236" || aioatie| seeeeeee 
12,088 | 593} 524] 35 [2,612 | 628 | pee 75.96 
The curculio was not especially abundant in this orchard during 
1906; as shown by the condition of the check, about 25 per cent of 
