Vol. 15—1961 - NorthEastern Weed Science Society

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

08.06.2015 Views

96. ..­ Spray applications were made with a hand sprayer fitted with a boom at a volume rate ot 45 gallons peraere. Granular applications were made with a small hand duster which provided good uniform distribution. standc.ounts were made approximately 4 weeks later and results are presented in Table II. Table II Onion Stands Following Pre~emer.genceApplications. of Ran40x T Percent stand* . Treatments 20'. row' 'ormulatIon rate, Handox T Randox CDAA equlvalentper acre 6 qts. 4.2 94 If 9 6.3' 91 12. II 8.4 86 42 los. 4.2 89 63 II 6.3 15 II 84 8.4 306Ibs. 6.0 ~ qts. ' '6.0 88 * average 10 replicates 5 test areas , . These results combine the average of treatments made trom 1 to 14 days after application. These averages are depressed somewhat by . the. influence ot the treatment made 1 day atter seeding. This can be expected since Ftandoxalone causes more tha~' tolerable reductions ot stand ,1f app11catlQns'are made immediately fo~10w1ng seeding particularly it heavy rains should tollow. ,It is for this reason that the norma1 practice 1s to make applicattons of Handox just at emergence.. Under these conditions the seedling is no longer sus- ' ceptlble to CDAAahol,1:J,dant be leached tnto the root zone. There was a cons'1stent increased reduction of startd wtth the two higher rates of Randox, T in th~ granu.1ar formulation.. No consequerrte L interactions between treatments and varieties and soil funglcldeinsecticide treatments were apparent. . .

97. Weed counts were made 3 weeks after application. Unfortunately severe frosts 10 days after the pre-emergence application troze out the weed seedlings trom the untreated areas making comparisons possible on only 1 ot the 5 farm sites. Even in these plots, weed populations were extremely low. These results are shown in Table III. Table III Weed Counts Following Pre-emergence Application* LambsquartersSmartweed. Barnyard graBS Randox T 6qts per A 1.5 2.0 II It II 9 1.0 1.5 II II It 12 .5 1.0 Randox T 42 -Lbs per A .5 .5 granules 63 II II II .5 0.0 II 84 " " .5 .5 Randox(gran.) 30 lbs. per A .5 2.0 Randox 6 qts per A 2.5 2.0 o untreated control 5.5 8.0 4 * average count 1.0 sq.tt. Second applications were made on-June 7 and Bon threetarm sites. Plants at this time were in the 3 to 4 leat stage. Prior to the application, all plots were cultivated and hand weeded including the untreated controls. Application rates wereidenttcal to the tirst treatments. The sprays were directed to the base ot the plants. Where accidental spray contSct on the leaves was made, some burning was noted. Subsequent growth ot these injured plants was not impaired and recovery appeared to be complete. Weed populations were heavy in the untreated controls and most treatments gave very etfective control as is shown in Table IV.

96. ..­<br />

Spray applications were made with a hand sprayer fitted with a boom<br />

at a volume rate ot 45 gallons peraere. Granular applications were<br />

made with a small hand duster which provided good uniform distribution.<br />

standc.ounts were made approximately 4 weeks later and results are<br />

presented in Table II.<br />

Table II<br />

Onion Stands Following<br />

Pre~emer.genceApplications. of Ran40x T<br />

Percent stand*<br />

. Treatments 20'. row'<br />

'ormulatIon rate,<br />

Handox T Randox CDAA equlvalentper acre<br />

6 qts. 4.2 94<br />

If<br />

9 6.3' 91<br />

12. II 8.4 86<br />

42 los. 4.2 89<br />

63 II<br />

6.3 15<br />

II<br />

84 8.4<br />

306Ibs. 6.0 ~<br />

qts. ' '6.0 88<br />

* average 10 replicates<br />

5 test areas<br />

, .<br />

These results combine the average of treatments made trom 1 to 14<br />

days after application. These averages are depressed somewhat by .<br />

the. influence ot the treatment made 1 day atter seeding. This can<br />

be expected since Ftandoxalone causes more tha~' tolerable reductions<br />

ot stand ,1f app11catlQns'are made immediately fo~10w1ng seeding<br />

particularly it heavy rains should tollow. ,It is for this reason<br />

that the norma1 practice 1s to make applicattons of Handox just at<br />

emergence.. Under these conditions the seedling is no longer sus- '<br />

ceptlble to CDAAahol,1:J,dant be leached tnto the root zone. There<br />

was a cons'1stent increased reduction of startd wtth the two higher<br />

rates of Randox, T in th~ granu.1ar formulation.. No consequerrte L<br />

interactions between treatments and varieties and soil funglcldeinsecticide<br />

treatments were apparent. . .

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