EXPERIMENT STATION BULLETINS. 525 



OENEKAL TKEATMENT FOK PLUM OKCHARDH. 



Phiin trees may be attacked by the San Jose or European fruit scale. 

 If found, make a spraying before growtli starts with strong lime-sulpluii- 

 or other eflficient scale destroyer, the same as directed for ai)i)le orchards. 



Just Befork the Buds Open spray with dilute liuie-sulpliur or the 

 Bordeaux-mixture and to every 50 gallons add 2i/j or 'A pounds of arsenate 

 of lead paste or one-half as much i)owder. Tliis is \o prevent the leaf 

 spot, brown rot, black knot, and curcidio. 



I>r. MEDIATELY Afteu THE Bi.ossoMs Fall it is very essential to make 

 a spraying to prevent leaf diseases, brown rot, and curculio. l^se dilute 

 lime-sulphur or Bordeaux-mixture. (On Ja])anese varieties use oidy the 

 self-boiled lime-sul])hur). For each 50 gallons of whatevei- is used, ndil 

 '2 pounds of arsenale of lead paste or 1 pound of llio ])(*wd('r. 



This is an important si)raying. Be on time and be thorough. 



Ten Days or Two Weeks Later it may pay to repeat the previous spray- 

 ing, especially if the weather is wet or the curculio serious. With varie- 

 ties that are susceptible to the brown-rot. it may pay to make s])rayings 

 everv ten davs or two weeks until there is danger of staining the frnit : 

 stop])ing at least a month before picking time. If desirable to make later 

 applications use a spray of weak copper sulphate. One pound of copper 

 sulphate to 150 or 200 gallons of water. Poison need not be used. 



Black Knot. Early in the spring a careful inspection should be made 

 of every tree, and all ''black-knots" cut out and destroyed, (.'ut back sev 

 eral inches below the knot. Disinfecting cuts as for pear-blight is not 

 necessary. A^'ild cherry trees harbor the di.sease and if diseased ones are 

 near plum or cherry orchards, the wild trees should be destroyed, if 

 possible. 



OENEBAL TREATMENT FOP rnEPPY OPrHAPOS. 



Inspect sweet cherries for scale. If found sjiray as for ajiple (.idiaiils. 

 Sonr cliei-ries are not often attacked by tlie San Jose scale, and theic is 

 I liei-efoi-e seldom need of s])raying them with the st I'ong lime siilplnir. 



•I I si- Bki-()I!e the I'r.ossoMs Oi'kv. spray with dilute lime •<n!|iIiMr l<i 

 ]»re\('nt lears]»<»t and br(»\vii rot. 



• li'sT After the BLOsso>rs Fall. si)ray with dilute lime snl|»linr (.r 

 nordeanx-niixtni-e and to every 50 gallons add l! pounds of arsenate of lend 

 l)aste or one-half as much of the jxiwder. This s])raying is to i)revent tin- 

 leaf-spot, brown rot and the curculio ami slugs. 



Ten Days or Two Weeks After the above s]»raying, it may be necessai-y 

 to make another aj^idication of the same mixture. The nece.ssity for this 

 spi-aying Avill de])end somewhat on the susceptibility of tlu^ variety to the 

 brown rot and the leaf si)ot and on the weather conditions, nn)ist weather 

 being favorable to the development of these troubles. 



Large Black Lice may appear on the leaves at any time. A sprav of 

 nicotine-sulphate will destroy them if applied before the leaves curl. 



Slugs sometimes appear after the fruit is harvested. A spray of ai- 

 senate of lead (2 or H i)oumls of the paste oi- half as nmcli of theiw.u .lei- 

 in 50 gallons of water I will destroy them. 



