Chlorantraniliprole Residual Control and Concentration Determination in Cotton

Studies were conducted in 2020 and 2021 at the Delta Research and Extension Center in Stoneville, MS, to determine the residual concentrations of chlorantraniliprole in cotton ( , L.) leaves, as well as the concentrations in petals and anthers that developed after the time of application. Foliar app...

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Bibliographic Details
Published in:Insects (Basel, Switzerland) Switzerland), 2023-02, Vol.14 (2), p.176
Main Authors: Smith, Jacob, Crow, Whitney D, Catchot, Angus L, Cook, Donald R, Gore, Jeffrey
Format: Article
Language:English
Subjects:
Analytical chemistry
Anthers
Bioassays
bollworm
Chemical properties
Control
Corn
Cotton
diamides
Diet
Flowers & plants
Foliar applications
Fruits
Helicoverpa zea
Humidity
insecticide
Insecticides
Laboratories
Leaves
Mortality
Moths
pest management
Petals
Pharmaceutical research
Physiological aspects
Soybeans
Vegetables
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Summary:Studies were conducted in 2020 and 2021 at the Delta Research and Extension Center in Stoneville, MS, to determine the residual concentrations of chlorantraniliprole in cotton ( , L.) leaves, as well as the concentrations in petals and anthers that developed after the time of application. Foliar applications of chlorantraniliprole were applied at four rates for leaves and two rates for petals and anthers at the second week of bloom. Additional bioassays were conducted to determine mortality of corn earworm ( , Boddie) in anthers. For the leaf study, plants were partitioned into three zones consisting of top, middle, and bottom zones. Leaf samples from each zone were analyzed for chemical concentrations at 1, 7, 14, 21, and 28 days after treatment (DAT). Residual concentrations, although variable, persisted through all sampling dates, rates, and zones tested. In this study, chlorantraniliprole remained detectable up to 28 DAT. Results from the cotton flower petal and anther studies detected concentrations of chlorantraniliprole in petals at 4, 7, 10, and 14 DAT, but no concentrations were detected in anthers. Therefore, no mortality of corn earworm was recorded in the anther bioassays. A series of diet-incorporated bioassays were conducted using concentrations previously found in the petal study to determine baseline susceptibilities of corn earworms and predicted mortality. Results from the diet-incorporated bioassays showed similar susceptibility in field and lab colony corn earworms. Concentrations of chlorantraniliprole could provide up to 64% control of corn earworm when feeding occurs on the petals.
ISSN:2075-4450
2075-4450
DOI:10.3390/insects14020176