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The Impact of Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) on Control of Dysmicoccus neobrevipes Beardsley (Hemiptera: Pseudococcidae)

1
Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
2
Department of Entomology, South China Agricultural University/Engineering Research Centre of Biological Control, Ministry of Education, Guangzhou 510640, China
3
Independent Science Advisor, York YO10 5AQ, UK
*
Author to whom correspondence should be addressed.
Insects 2019, 10(5), 131; https://doi.org/10.3390/insects10050131
Received: 14 February 2019 / Revised: 19 April 2019 / Accepted: 1 May 2019 / Published: 6 May 2019
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Abstract

Cryptolaemus montrouzieri (Coleoptera: Coccinellidae) is an important predator of the mealybug Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae), a major pest of Agave sisalana in China. Limited reports on the efficacy of C. montrouzieri against D. neobrevipes are available. This study reports the predatory efficacy and functional response of C. montrouzieri against D. neobrevipes under laboratory conditions. The prey consumption rate per day of 4th instar larvae of C. montrouzieri feeding on 1st instar D. neobrevipes nymphs (241.3 mealybugs) was the highest among the different larval life stages of the beetle. For C. montrouzieri, the prey consumption per day of adult females (19.8 mealybugs) was significantly higher compared to males (15.2 mealybugs) when feeding on 3rd instar D. neobrevipes nymphs. The functional responses of C. montrouzieri on 1st and 2nd instar D. neobrevipes nymphs were determined as Holling type II. The search rates of C. montrouzieri 4th instar larvae towards the 1st and 2nd instar nymphs of D. neobrevipes were higher than those of the other beetle life stages. In addition, the handling times of 4th instar larvae were shorter than those of the other beetle life stages. The results from this study indicate that C. montrouzieri can be used as a predator of D. neobrevipes and, therefore, it should be evaluated further for use as a biocontrol agent in D. neobrevipes management programs. View Full-Text
Keywords: Cryptolaemus montrouzieri; Dysmicoccus neobrevipes; efficacy; biological control Cryptolaemus montrouzieri; Dysmicoccus neobrevipes; efficacy; biological control
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Qin, Z.; Wu, J.; Qiu, B.; Ali, S.; Cuthbertson, A.G.S. The Impact of Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) on Control of Dysmicoccus neobrevipes Beardsley (Hemiptera: Pseudococcidae). Insects 2019, 10, 131.

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