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Evidence for a Trifluralin‐Potassium Nitrate Interaction Affecting Tomato Seedling Growth 1
Author(s) -
Barnes L. W.,
Krieg D. R.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300040028x
Subject(s) - trifluralin , lycopersicon , potassium , biology , seedling , chlorophyll , potassium nitrate , photosynthesis , dry weight , liter , nutrient , nitrate reductase , nitrate , horticulture , agronomy , botany , zoology , pesticide , chemistry , ecology , organic chemistry , endocrinology
The influence of various potassium nitrate (KNO 3 ) concentrations on herbicidal activity of trifluralin ( α,α,α ‐trifluoro‐2,6‐dinitro‐N,N‐dipropyl‐p‐toluidine) was investigated using hydroponically grown tomato ( Lycopersicon esculentum Mill. cv. ‘Homestead 24’) seedlings. The treatments consisted of all combinations of 0.0, 0.5, and 1.0 mg trifluralin/liter and 0, 15, and 30 meq KNO 3 /liter added to the base nutrient solution. Treatment was initiated when the third true leaf began expanding and lasted for 1 week. The addition of trifluralin to the base nutrient solution reduced fresh weight, dry weight, leaf area, chlorophyll concentration, and photosynthetic rate. The addition of 15 meq KNO 3 liter to the herbicide treatments further reduced these same parameters when compared to the herbicide alone. The addition of 30 meq KNO 3 /liter to the herbicide treatments increased the growth of the seedlings to levels comparable to, or in excess of, the herbicide alone.