BA 7:2 - Daud et al. 2012 - Abstract  

Insecticide Effect of Sucrose Fatty Acid Esters on Calacarus heveae Feres (Acari: Eriophyidae) in two rubber tree clones

Rodrigo D. Daud, Reinaldo J.F. Feres & Maurício Boscolo


Sucrose esters are biodegradable, non pollutant and safe for health; moreover, they have shown great potential in the pest control. We tested a crude mix of sucrose esters on the survivorship and oviposition of Calacarus heveae Feres (Acari: Eriophyidae) females, an important rubber tree pest mite. The females were collected from rubber leaflets of the GT 1 and RRIM 600 clones. The mites were kept on stock arenas placed in rearing chamber at 28 + 0,1°C, 80 + 10% of relative humidity and 12h of light phase about two weeks before the assays. After this period, the mites were transferred to assay arenas made with leaflets from the same clone of stock arenas. The survivorship of females sprayed with sucrose esters in the concentrations of 1, 2, 3 and 4 g/L and their oviposition effect with 0.5 and 1 g/L were analyzed. The mites sprayed with 4 g/L had about 80% of mortality, while those with 1 g/L around 60%. All mites that died in the treatments with sucrose ester became dark with wrinkled tegument and decreased their body volume, suggesting dehydration. We also observed the efficacy of 1 g/L concentration to decrease the female oviposition in about 50%, in the third day after spraying.
No differences were observed in the mortality and oviposition between females kept on both clones.

Key words
- Biopesticide, Euphorbiaceae, Hevea brasiliensis, Integrated Pest Management.

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Sociedade Entomológica do Brasil