Vol. 15—1961 - NorthEastern Weed Science Society

Vol. 15—1961 - NorthEastern Weed Science Society Vol. 15—1961 - NorthEastern Weed Science Society

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172. The ne'ed fora :modified procedure' t1as. a1.so.'ind1cated by addins known, amounts. of .ATAto ..~he a.p~le. W'hi!e they were ,beins, ~pal'ed for analyses and then dete'rm1n1ngthequa.nti ties' of the added Arm.which were recovered in 'the. a.nal~e~,(~.ble 2)~. ' ' . . '\ ; .' . . ... ;",,;. ' Ta.ble 2.' Recovery8 of 'added amino triazo.le by the chromot1"opie acid ~e!e!lll!n!t!o~ !!.f_N£.Il_9!lQO!d!P- . ." ~ . ....D!l!c!oES_aEP!e! fr.2.m_So!!~!r!a!e~ !~e.:. ---~--~---'-----~-~-1---------------- Amount of ,Urlkno1nls 'read .. iost ',Unknowns read a.ga.inst ATAadded '_ "':1'!~!!t_b~k;':' .:;..__ J aEP!e_b!f!!k... .:..'__ in p.p.m. I . -'A.TA,) Percent I ATA', Per cent ' ' I _ -(Pl'!}J __ r!c£V!rz _ J __ iPPnl--4 _r!c~!rz _ I . ., I 'I ' o I . 0.050, I .. , ',_ .' : 0.10 I 0.064 1 ,8.-0 I 0.03 I 3 0.15 ': q.p64"t, ,5.4 .... ,I 0.04 " . r " .. 4. , ' _o.:..5Q. J _ Q.!±O~ J __ ~.:.8 J __ 2,.,'19_-4_,_18 .... __ .....: _ .... --------------------------~--------- ... ; I~ . ., aReport from C. W. England, Laboratorl~8 on December' 24, 1959.' ~ " \ '

1730 Additiona! apple .,samples were provided for amino triazole determinations by the FDARapid Method using the Bratton··Ma.rshall procedure and are reported in Table 3. Table 3. Amino triazole residue and recovery ana.lysesa of StaymanJ g,o!~n_D!l!c!0.!!S_a.:!d_R~ ~l!s.:. .~ ,_. __ =---------~----_._---~-~_._~--------~-~--- I ., Recovery of added ATA ' Variety ATA -J.!1!A -,-PercEmt. treatmen~ (ppm)' ATA added t Recovered' Recoveryb '.Tree rate in I (ppm)' (ppm) , t , orchard' • , , I ,I ATA 7 ADiO,m:£'"ot. ­ ----~---------------------------------- , '. I , , • Stayman o 0.001 , 0.15 0.09 60 , C-R5T10 0.25 0.21 84 0·50 0.457 91 " , - stayman 0.011 , 0.25 , 0.234 89 'c-R16T8 Stayman 0.012 , 0.25 0.214 80 tC-Rl3T2 Stayman 0.038 ' 0.25 0.249 84 fC-Rl2T13 t Golden Delicious' 0.08 , 0.15 0.10 67 0.25 0.20 80 0·50 0.42 84 Golden Delicious' 4 c 0.083 ' 0.25 0.311 91 'K-R5T4 Rome ,gome to' .!.._ _ '2!i~ 0.037' ' __ 0..:.0.2.3_' __ Q.·g5__ 0.25 ' _ Q..gr§_ 0.2'{ '97 . ~ _ 20 a Analyses by C. W. Eng] and Laboratories with the FDARapid Method using the Bratton-Marshall procedure for amino triazole. b Controls were subtracted before recoveries were calculated. c The ground, cover beneath each of these trees was sprayed in 1957, 1958, and 1959. d Samp1es of Golden Delicious on market presumably from trees 'Where amino triazole had not been used. 'K-R4T21 ~K-~4~ • From the analyses presented in Tab1e 3 no relationships in amino triazole residues are apparent between apples from trees 'Where amino triazole had been spraYed beneath them and from untreated trees. Differences between varieties have not been accounted for except to postulate that some varieties have more amino-like compo\mds present in the fruit than do othe r varieties. • 1.- Schubert"; Oscar Ef.- 19597 -Effect of recommended and excessive rates of certain herbicides to apple trees of varying ages. Proc . 13th Annual Meeting :NE'WCC:62-63.

172.<br />

The ne'ed fora :modified procedure' t1as. a1.so.'ind1cated by<br />

addins known, amounts. of .ATAto ..~he a.p~le. W'hi!e they were ,beins, ~pal'ed<br />

for analyses and then dete'rm1n1ngthequa.nti ties' of the added Arm.which<br />

were recovered in 'the. a.nal~e~,(~.ble 2)~. ' ' . .<br />

'\ ; .' . . ... ;",,;. '<br />

Ta.ble 2.' Recovery8 of 'added amino triazo.le by the chromot1"opie acid<br />

~e!e!lll!n!t!o~ !!.f_N£.Il_9!lQO!d!P-<br />

. ." ~ .<br />

....D!l!c!oES_aEP!e! fr.2.m_So!!~!r!a!e~ !~e.:.<br />

---~--~---'-----~-~-1----------------<br />

Amount of ,Urlkno1nls 'read .. iost ',Unknowns read a.ga.inst<br />

ATAadded '_ "':1'!~!!t_b~k;':' .:;..__ J aEP!e_b!f!!k... .:..'__<br />

in p.p.m. I . -'A.TA,) Percent I ATA', Per cent ' '<br />

I _ -(Pl'!}J __ r!c£V!rz _ J __ iPPnl--4 _r!c~!rz _<br />

I . ., I 'I '<br />

o I . 0.050, I .. , ',_ .' :<br />

0.10 I 0.064 1 ,8.-0 I 0.03 I 3<br />

0.15 ': q.p64"t, ,5.4 .... ,I 0.04 " . r " .. 4. , '<br />

_o.:..5Q. J _ Q.!±O~ J __ ~.:.8 J __ 2,.,'19_-4_,_18 .... __ .....: _ ....<br />

--------------------------~---------<br />

... ; I~<br />

. .,<br />

aReport from C. W. England, Laboratorl~8 on December' 24, 1959.'<br />

~ " \ '

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