Efficacy, behavior and fate of bromoxynil and photosynthetic electron transport inhibition by bromoxynil following application in overhead irrigation water
Field research was conducted to evaluate the effects of application water volumes, a nonionic surfactant and a nonemulsifiable vegetable oil on bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) efficacy when applied in overhead irrigation water. Bromoxynil efficacy generally decreased as water column increased. Addition of either adjuvant in irrigation applications improved broadleaf weed control relative to bromoxynil applied alone and was dependent on the specific irrigation water volume used. Application of bromoxynil in large water volumes to foliage or to foliage and roots of entire leaf morning glory (Ipomoea hederacea var. integriuscula Gray) pitted morning glory (Ipomoea lacunosa L.) resulted in photosynthetic electron transported inhibition as evidenced by elevated chlorophyll fluorescence. Bromoxynil penetration of roots and stems of entireleaf and pitted morning glory and subsequent moment from these sites was compared to the penetration and movement of bromoxynil applied to foliage. Penetration of /sup 14/C-bromoxynil oxtanoate into the leaves of the two morning glory species over a short time course was also investigated.
- Research Organization:
- North Carolina State Univ., Raleigh (USA)
- OSTI ID:
- 6403080
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
60 APPLIED LIFE SCIENCES
ABSORPTION
CARBON 14 COMPOUNDS
CARBOXYLIC ACIDS
CHLOROPHYLL
FLUORESCENCE
FOLIAR UPTAKE
GROWTH
HERBICIDES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
IRRIGATION
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LUMINESCENCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PESTICIDES
PHYTOCHROMES
PIGMENTS
PLANT GROWTH
PLANTS
PORPHYRINS
PROTEINS
ROOT ABSORPTION
SURFACTANTS
TRACER TECHNIQUES
UPTAKE
WEEDS