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Response of Vegetable Crops to Sublethal Application of 2,4-D

Published online by Cambridge University Press:  12 June 2017

Delbert D. Hemphill Jr.  and
Marvin L. Montgomery
Delbert D. Hemphill Jr.
Affiliation:
No. Willamette Agric. Expt. Stn., Aurora, OR 97002
Marvin L. Montgomery
Affiliation:
Dep. Agric. Chem., Oregon State Univ., Corvallis, OR 97331
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Abstract

Sublethal amounts of 2,4-D [(2,4-dichlorophenoxy) acetic acid] were applied to several vegetable crops in order to determine effect on yield and quality in a simulated drift experiment. Tomato (Lycopersicon esculentum Mill.) and root crops were most sensitive to 2,4-D; as little as 2.1 g/ha of acid distorted tomato fruit shape and elongated radish (Raphanus sativus L.) roots. All root crops were rendered unmarketable by 10.4 g/ha and gross yields were reduced by exposure to 104 g/ha. Yield of peppers (Capsicum frutescens L. var. grossum) was increased by exposure to 2.1 g/ha and severely depressed by 104 g/ha. Cucumber (Cucumis sativus L.) fruit shape was distorted at 11 g/ha and yield was reduced slightly. Lettuce (Lactuca sativa L.), onion (Allium cepa L.), and cabbage (Brassica oleracea L. var. capitata) were least sensitive to 2,4-D. Exposure to 20.8 g/ha did not reduce yields of lettuce or cabbage. Onion yields were reduced by application of 104 g/ha. Bush bean (Phaseolus vulgaris L.) yield was decreased by exposure to 22 g/ha, but potato (Solarium tuberosum L.) yield increased at 16 g/ha. Herbicide residues in the crop foliage were proportional to the degree of exposure. Residue analysis combined with foliar symptoms may be useful in predicting crop damage following 2,4-D drift.

Keywords

Brassica oleraceaPhaseolus vulgarisCucumis sativusLactuca sativaAllium cepaCapsicum frutescensSolanum tuberosumLycopersicon esculentumfoliar symptomsresiduesdrift
Type
Research Article
Information
Weed Science , Volume 29 , Issue 6 , November 1981 , pp. 632 - 635
Copyright
Copyright © 1981 by the Weed Science Society of America 

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References

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