Pest Management Science (2016) 72, 1059-1066

Xiaona Zhang, Daochao Jin, Xiao Zou and Jianjun Guo (2016)
Laboratory and field evaluation of an entomopathogenic fungus, Isaria cateniannulata strain 08XS-1, against Tetranychus urticae (Koch)
Pest Management Science 72 (5), 1059-1066
Abstract:
BACKGROUND
The two-spotted mite, Tetranychus urticae Koch, is one of the most serious mite pests of crops throughout the world. Biocontrol of the mite with fungal agents has long been paid much attention because of the development of insecticide resistance and the severe restriction of chemical pesticides. In this study, the efficacy of submerged conidia of the entomopathogenic fungus Isaria cateniannulata strain 08XS-1 against T. urticae eggs, larvae and female adults was evaluated at different temperatures and humidity in the laboratory and under field conditions.
RESULTS
The results showed that a suspension of 2 × 10⁷ submerged conidia mL^-1 caused the highest mortalities of mite eggs, larvae and females (100, 100 and 70% respectively) at 100% relative humidity and 25 °C in the laboratory. In the field experiments against the mites, a suspension of 2 × 10⁸ submerged conidia mL^-1 achieved significant efficiency – the relative control effects were 88.6, 83.8 and 83%, respectively, in cucumber, eggplant and bean fields after 10 days of treatment.
CONCLUSION
The results suggest that the I. cateniannulata strain 08XS-1 is a potential fungal agent, with acceptable production cost of conidia, against T. urticae in the field in an area such as southwestern China with higher air humidity.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Database assignments for author(s): Dao-Chao Jin

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus urticae	Eggplant (Solanum melongena)	China (south)
	Tetranychus urticae	Beans (Phaseolus)	China (south)
	Tetranychus urticae	Cucumber (Cucumis sativus)	China (south)
Cordyceps cateniannulata (entomopathogen)	Tetranychus urticae	Cucumber (Cucumis sativus)	China (south)