1. Encapsulation of fluazinam to extend efficacy duration in controlling Botrytis cinerea on cucumber
- Author
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Xili Liu, Pengfei Liu, Panqing Liu, Jianjun Hao, Bin Wang, Yanjun Xu, and Qizheng Liu
- Subjects
0106 biological sciences ,biology ,Aminopyridines ,Economic shortage ,General Medicine ,biology.organism_classification ,01 natural sciences ,Microscopic observation ,Fungicide ,010602 entomology ,chemistry.chemical_compound ,Pesticide formulation ,Ethyl cellulose ,chemistry ,Insect Science ,Phytotoxicity ,Botrytis ,Food science ,Cucumis sativus ,Agronomy and Crop Science ,Fluazinam ,010606 plant biology & botany ,Botrytis cinerea - Abstract
BACKGROUND Fluazinam is an effective fungicide in controlling gray mold, but has short duration of efficacy. Increasing application dosage may cause phytotoxicity. To overcome this shortage, a controlled-release technology was studied by encapsulating fluazinam. Ethyl cellulose polymer microcapsules were loaded with fluazinam to formulate a fluazinam capsule suspension (FCS). The efficacy for inhibition of B. cinerea and persistency of the FCS were examined by comparing with fluazinam technical concentrate (FTC) and aqueous fluazinam suspension concentrate (FSC) using microscopic observation and high-performance liquid chromatography analysis. RESULTS FCS formed capsules, with median size of 3.17 μm in diameter, had 82.3% encapsulation efficiency. It had a stronger inhibitory activity against B. cinerea than FTC and FSC measured 7 days after the treatments. The half-life of FCS on cucumber leaves was 3.4 days, longer than the 2.3 days of FSC. CONCLUSION FCS formulation significantly improved the inhibition of B. cinerea and resulted in prolonged and sustained release. Moreover, microencapsulation increased the duration of the efficacy of fluazinam on target crops. This formulation could help to sustain pesticides and protect the environment. © 2021 Society of Chemical Industry.
- Published
- 2021