In 1970, the herbicide plots were sprayed with a 

 mounted boom and single nozzle which applied a 3-foot 

 dosage rate of 40 gallons per acre, 

 chemical or combination of chemicals 

 for the paraquat treatment which was 

 i nterval s . 



tractor- 

 band at a 

 A single application of each 

 was applied on May 15, except 

 applied at approximately 5-week 



ceas 



grow 



mari 



new 



cant 



and 



cant 



rate 



trea 



than 



ti on 



grow 



reco 



Growth 

 ed. Th 

 th and 

 zed in 

 growth 



differ 

 check p 

 ly grea 

 , s i m a z 

 tments . 



pi ots 



treatm 

 th from 

 r d s w i 1 



mea 

 ese 

 trun 

 Tabl 

 than 

 ence 

 1 ots 

 ter 

 i ne 



Th 

 trea 

 ents 



the 

 1 be 



suremen 



measure 



k diame 



el. A 



either 



s among 



. The 



in plot 



al one o 



e check 



ted wit 



or mow 



i n i t i a 



eval ua 



ts were 

 ments i 

 ter. R 

 11 chem 

 mowed 

 the ch 

 average 

 s treat 

 r paraq 



plots 

 h dal ap 

 ing. T 

 tion of 

 ted whe 



take 

 ncl ud 

 esul t 

 i cal 

 or ch 

 emi ca 



trun 

 ed wi 

 uat a 

 had s 

 on , S 

 hese 



the 

 n tre 



nine 

 ed the 

 soft 

 treatm 

 eck pi 

 1 trea 

 k diam 

 t h Sin 

 1 one , 

 i g n i f i 



i nb 



ar" 



resul t 

 herbi c 

 es bee 



arly Dece 



average 

 he 1970 t 

 ents had 

 ots . The 

 tments or 

 eter of t 

 bar* at th 

 than in a 

 cantly le 

 at 2 poun 

 s represe 

 idal trea 

 ome of be 



mber 

 amoun 

 reatm 

 s i g n i 

 re we 

 betw 

 rees 

 e 3 

 ny of 

 ss tr 

 ds , t 

 nt on 

 tment 

 a r i n g 



afte 

 t of 

 ents 

 f i ca 

 re n 

 een 

 was 

 r 4 



the 

 unk 

 he c 

 e ye 

 s . 



age 



r growth 



new 



are sum- 

 ntly more 

 s i g n i f i ■ 

 the mowed 

 s i g n i f i - 

 pound 



other 

 growth 

 ombi na- 

 ar ' s 

 Yield 



Table 1. The influence of herbicides on vegetative growth of newly 

 established apple trees - Orchard 69, Highmoor Farm - 1970 



Treatment - (lbs. prod/a) 



Growth of terminal 



+ 3 longest -, 

 1 ateral s/tree (in.) 



Trunk diameter 

 increase (in.) 



Sinbar 4#* 



Sinbar 3#* 



Sinbar 2#* 



Simazine 4#* 



Sinbar 1#*+ Karmex 2#* 



Simazine 2# + Paraquat 1 



Paraquat 1 qt. (3 applic 



Dalapon 10# 



Mow 3X 



Mow 2X 



Check 



qt 

 ) 



112 



111 



111 



111 



104 



98 



98 



90 



60 



58 



47 



8a 

 4a 

 4a 

 Oa 

 2a 

 4a 

 2a 

 3a 

 7b 

 6b 

 7b 



1 

 1 

 

 1 

 1 

 

 1 

 

 

 

 



T8a 

 11a 

 99b 

 00b 

 14a 

 90b 

 09a 

 93b 

 87b 

 85b 

 71c 



1 



Means followed by the same letter are not 

 by Duncan's multiple range test at the 99% 

 *Trade name 



significantly different 

 level of probability. 



*************** 



HERBICIDES AND WINTER INJURY 



Duane W. Greene 

 Department of Plant and Soil Sciences 



Re orts from Washington State, ^'ichigan and Ontario, Canada, 

 suggest that there is a relationship between herbicidal weed con- 



