7 - 



potent growth regulators and it is questionable whether 2,4,5-T 

 will be approved for use in apple orchards. Another drawback of 

 the stub treatment is that it would be tedious. Therefore, an 

 easily applied and safe chemical means of sprout control is still 

 needed. 



A 

 seedl i 

 effect 

 contro 

 ting a 

 ting a 

 chards 

 The sp 

 thorou 

 weed c 

 sprays 

 ment b 

 basis , 

 used a 



Vigo 

 ng ro 

 ivene 



1: ( 



gent 



gent 



, but 



routs 



ghly 



ontro 



were 

 ecaus 



all 

 nd re 



rous b 

 otstoc 

 ss of 

 1 ) amm 

 Spread 

 1-11 . 

 the 1 

 were 

 spraye 

 1 with 

 repea 

 e of p 

 treatm 

 sul ts 



1 ock 

 ks ne 

 two c 

 on i urn 

 er WK 



Both 

 abel 

 prune 

 d at 



a kn 

 ted 

 oor s 

 ents 

 obtai 



of sp 

 ar Ha 

 ommer 



sulf 



and 



herb 

 does 

 d dur 

 rates 

 apsac 

 n May 

 ucker 

 were 

 ned a 



ur-type ' 



ncock. Ma 



c i a 1 1 y a V 



amate (AM 



(2) paraq 



icides ar 



not s p e c i 



i n g the d 



no h i g h e 



k sprayer 



25, 1971 



control 



made to 1 



re shown 



Del icious ' 

 ryland, wa 

 ailable he 

 S)2 with a 

 u a t , with 

 e labeled 

 f ical ly me 

 ormant sea 

 r than rec 

 on May 22 

 , but not 

 in 1970. 

 4 or more 

 in Table 1 



tree 

 s use 

 r b i c i 

 nd wi 

 and w 

 for u 

 n t i n 

 son a 

 ommen 

 , 197 

 the p 

 Appl i 

 s i n g 1 



s grow 

 d to t 

 des f 

 thout 

 i thout 

 se in 



sprou 

 nd reg 

 ded fo 

 0. Th 

 araqua 

 ed on 

 e tree 



mg on 

 est the 

 r sprout 

 the wet- 



the wet- 

 apple or- 

 t control 

 rowth was 

 r general 

 e AMS 

 t treat- 

 a row 

 s. Rates 



AMS with or without Spreader WK gave good initial kill of 

 sprayed sprouts but some short and slender regrowth occurred later 

 in the season. Paraquat caused some leaf chlorosis and crooked 

 growth but failed to kill the sprouts. The pruning time required 

 to remove the sprouts from the check trees was slightly over 1 

 minute per tree; whereas, approximately one-third the time was 

 needed where AMS was used. The slight suppression of growth by 

 paraquat was reflected by some decrease in pruning time as compared 

 with check trees. 



The AMS sprays were repeated on the same trees on May 25, 1971. 

 Sprout control was better than in 1970 and little regrowth occurred. 

 These results indicate that AMS sprays will satisfactorily control 

 young sprouts around apple trees if thoroughly sprayed in mid- to 

 late May, or when the sprouts are only 6 to 8 inches tall. Old 

 woody sprouts from the previous year might not be killed. 



AMS should not be used around trees younger than 3 years due 

 to the danger of bark injury. It is not translocated into the tree, 

 but is effective for the rapid killing of young sprouts. 



When applying AMS, no spray should contact fruit or foliage 

 as injury will occur. Spray equipment should be rinsed and cleaned 

 thoroughly after each use because of the corrosive nature of AMS. 



Ammate X* 



