Occurrence of Telenomus dignus (Gahan) on the Sugarcane Borers, Scirpophaga intacta Snellen and Chilo sacchariphagus Bojer in Guangxi Province, China

Qin Zhen-Qiang, Goebel François-Régis, Li De-Wei, Wei Jin-Ju, Song Xiu-Peng, Luo Ya-Wei, Liu Lu, Deng Zhang-Yun. 2018. Occurrence of Telenomus dignus (Gahan) on the Sugarcane Borers, Scirpophaga intacta Snellen and Chilo sacchariphagus Bojer in Guangxi Province, China. Sugar Tech, 20 (6) : 725-729.

Quartile : Q3, Sujet : AGRONOMY

Résumé : Sugarcane (Saccharum officinarum L.) is an important crash crop in Guangxi, China. The sugarcane borers (Scirpophaga intacta Snellen and Chilo sacchariphagus Bojer) cause serious damage to sugarcane crop in Guangxi Province. Consequently, increasing attention has been given into the investigation and development of biocontrol agents to control these pests. The parasitoid wasp Telenomus sp. has previously been reported as a natural enemy of sugarcane borers in Guangxi Province. Telenomus dignus is the species found parasitizing borer eggs in field in Fujian Province, but it has not been previously mentioned as natural enemy of these pests. T. dignus was collected on S. intacta egg masses and identified from Shangsi County of Guangxi Province during 2013. In these studies, the parasitic behavior of T. dignus on eggs of S. intacta and C. sacchariphagus was investigated under field conditions during 2013–2014. The results from the current study showed that the percentage of parasitized egg masses of S. intacta parasitized by T. dignus was 45.71 and 57.14% in 2013 and 2014, respectively, while in C. sacchariphagus egg masses, the percentage of parasitism by T. dignus was 45.28 and 51.09% in 2014, respectively. The sex ratio (female/male) of T. dignus adults on S. intacta was 1.45:1 in 2013 and 5.17:1 in 2014 and was 2.17:1 on C. sacchariphagus in 2014. T. dignus was the dominant egg parasitoid of these two species of sugarcane borers in isolated sugarcane regions in Guangxi Province. Further investigations on biology of T. dignus are required to develop this parasitoid as a more widespread biocontrol agent of sugarcane borers.

Mots-clés Agrovoc : canne à sucre, Saccharum officinarum, lutte biologique, ravageur des plantes, Telenomus, Chilo sacchariphagus, Scirpophaga

Mots-clés géographiques Agrovoc : Chine

Mots-clés complémentaires : Scirpophaga intacta, Telenomus dignus

Mots-clés libres : Sugarcane, Egg parasitoids, Biocontrol, Stemborers, Parasitism rate

Classification Agris : H10 - Ravageurs des plantes
H01 - Protection des végétaux - Considérations générales

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Qin Zhen-Qiang, Guangxi Academy of Agricultural Sciences (CHN) - auteur correspondant
• Goebel François-Régis, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0002-5438-1078
• Li De-Wei, Guangxi Academy of Agricultural Sciences (CHN)
• Wei Jin-Ju, Guangxi Academy of Agricultural Sciences (CHN)
• Song Xiu-Peng, Guangxi Academy of Agricultural Sciences (CHN)
• Luo Ya-Wei, Guangxi Academy of Agricultural Sciences (CHN)
• Liu Lu, Guangxi Academy of Agricultural Sciences (CHN)
• Deng Zhang-Yun, Guangxi Academy of Agricultural Sciences (CHN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/589949/)

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