Evaluation of the compatibility of Isaria fumosorosea (Hypocreales: Cordycipitaceae) IF-1106 with several adjuvants

The compatibility of Isaria fumosorosea IF-1106 with 12 commercial pesticide adjuvants was evaluated using the predictive parameter SC 90 (the adjuvant concentration at which 90% of conidia survived). Based on the SC 90 values and the functionalities of the adjuvants used, two conidial wettable powd...

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Bibliographic Details
Published in:Biocontrol science and technology 2021-05, Vol.31 (5), p.512-525
Main Authors: Diao, Hongliang, Tian, Jing, Xing, Peixiang, Wang, Conglin, Han, Zhihui, Liu, Tongxian, Ma, Ruiyan
Format: Article
Language:English
Subjects:
Adjuvants
Commercialization
Compatibility
Conidia
formulation
Germination
Greenhouses
Insects
Isaria fumosorosea
Parameters
Pesticides
Polymers
Quality control
Water soluble polymers
Wetting
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Summary:The compatibility of Isaria fumosorosea IF-1106 with 12 commercial pesticide adjuvants was evaluated using the predictive parameter SC 90 (the adjuvant concentration at which 90% of conidia survived). Based on the SC 90 values and the functionalities of the adjuvants used, two conidial wettable powder formulations of IF-1106 were formulated. Our results indicated that SC 90 values can be used to evaluate the compatible concentration of adjuvants and Isaria fumosorosea. The wettable powder formulations F1 and F2 formulated on the basis of this research have a conidia germination rate of 92.4% ± 2.5% and 90.6% ± 1.3%, respectively, showing high compatibility, and their main quality control parameters (conidia germination rate, conidia suspension rate, wetting time, etc.) met commercialisation requirements. Our study also verified that IF-1106 is compatible with major surfactant and water-soluble polymer adjuvants in pesticide formulations when the use concentration is less than its SC 90 . Our research provided a new method for evaluating the compatibility of adjuvants with entomogenous fungi, and formulated two promising mycoinsecticide formulations for sucking insects in greenhouses.
ISSN:0958-3157
1360-0478
DOI:10.1080/09583157.2020.1869700