2 - 



Use o 

 V a r i e 

 a p p 1 i 

 100 g 

 days 

 p i c k i 

 ri pen 

 one p 

 shoul 

 Some 

 phon , 

 AUho 

 pre-h 

 to di 

 day 

 p 1 y i n 

 alone 

 (NAA) 

 effec 



n ear 

 ties 

 c a t i 

 al Ion 

 and p 

 ng. 

 ing. 

 i c k i n 

 d hel 

 growe 

 then 

 ugh t 

 arves 

 scour 

 r 1 

 g the 

 acce 

 shou 

 t. 



ty varie 

 such as 

 n a p p 1 i e 

 s of wat 

 ermit th 

 Neverthe 



Theref 

 g to rem 

 p minimi 

 rs may.w 



picking 

 he ethep 

 t interv 

 age the 

 r 2 days 



ethepho 

 1 erates 

 Id be us 



ties. E 

 Early Mc 

 d 7-10 d 

 e r will 

 e harves 

 1 ess , ea 

 re , i t m 

 ove the 

 ze the p 

 onder ab 



the rip 

 hon-appl 

 al , AmCh 

 spraying 



later, 

 n is the 

 fruit dr 

 e d with 



thepho 

 Intosh 

 ays be 

 increa 

 t of a 

 rly va 

 ay be 

 riper 

 robl em 

 out th 

 e frui 

 e 1 abe 

 em, th 

 of th 

 Harve 

 pref e 

 op. T 

 the et 



n 1 s a 



and Pu 

 fore no 

 se red 



high p 

 r i e t i e s 

 a d V i s a b 

 fruit a 

 of ove 

 e possi 

 t that 

 1 is no 

 e manuf 

 is chem 

 sting t 

 rred pr 

 heref or 

 hephon 



very u 

 ri tan . 

 rmal h 

 col or 

 ercent 

 are n 

 le for 

 nd the 

 r - r i p e 

 bility 

 day, 

 t defi 

 acture 

 i c a 1 a 

 he mat 

 a c t i c e 

 e , nap 

 to cou 



seful too 

 In gene 

 arvest at 

 devel opme 

 age of th 

 otorious 



some var 



n apply e 



fruit at 



of spray 



r 1 or 2 



nite with 



r of ethe 



nd harves 



ure fruit 



Etheph 



hthal enea 



nteract t 



1 on 

 ral , 



1/2 

 nt wi 

 e cro 

 for u 

 i e t i e 

 theph 



harv 

 ing t 

 days 



rega 

 phon , 

 ting 



and 

 on ap 

 c e t i c 

 his a 



early 

 a single 

 pint per 

 thin 4-5 

 p in one 

 neven 

 s to make 

 on. This 

 est. 



he ethe- 

 1 ater . 

 rd to 



prefers 

 the same 

 then ap- 

 plied 



acid 

 bsci ssi on 



Once the color benefit from the ethephon-stop-drop spray com- 

 bination becomes apparent, color develops quickly. Therefore, be- 

 ginning the 3rd day after applying this combination spray, you 

 would do well to look at the fruit at least twice a day. The fruit 

 should be picked as soon as color is adequate in order to minimize 

 firmness loss. 



Use on 

 before 

 per 1 

 acre a 

 a p p 1 i c 

 rate t 

 fruit 

 the CO 

 cation 

 with 

 ter tr 



Mcintosh. 



normal har 

 gal 1 ons o 

 t IX) will 

 a t i n . F r u 

 han on non- 

 flesh softe 

 ncentrati on 



to harvest 

 nly 1/12 pi 

 eatment, be 



A single application of ethephon applied 2-3 weeks 

 vest at concentrations ranging from 1/4 to 1 pint 

 f water (assuming 400 gallons of spray mixture per 

 increase red color development within 7 days after 

 it color will continue to increase at a faster 

 sprayed trees. This response is accompanied by 

 ning; the degree of softening is associated with 

 of ethephon applied and number of days from appli- 

 of the treated fruits. Mcintosh fruits sprayed 

 nt of ethephon may be excessively soft 21 days af- 

 ing suitable for immediate use only. 



Ethephon-treated fruits will keep well in regular storage pro- 

 vided they are in good condition at harvest. Scald may develop to 

 a greater extent on stored fruit that has received ethephon than on 

 non-treated fruits. 



Ethephon should not be applied earlier than 3 weeks prior to 

 normal anticipated harvest because fruit quality could be reduced. 

 A mid-July application of Alar-85* on trees scheduled to receive 

 ethephon is of benefit. Although Alar-85* is ineffective for drop 

 control on ethephon-treated trees, it will help maintain fruit-flesh 

 f i rmness . 



NAA or 2,4,5-trichlorophenoxypropionic acid (2,4,5-TP) must be 

 used to counteract the abscission effect of ethephon. A single ap- 



