Joint Action of Spinosad and Sweet Almond Oil Mixture against the Saw Toothed Grain Beetle, Oryzaephilus surinamensis (L.) | ||||
| Annals of Agricultural Science, Moshtohor | ||||
| Article 14, Volume 58, Issue 3, September 2020, Page 665-672 PDF (454.9 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/assjm.2020.132029 | ||||
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| Author | ||||
Mahmoud hassan 
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| Plant Protection Department, Faculty of Agriculture, Benha University, Egypt | ||||
| Abstract | ||||
| Bioassay tests were conducted to determine the combined action of spinosad and sweet almond oil against the adults of Oryzaephilus surinamensis (Coleoptea, Silvanidae), at 28 ±2°C and 65±5% RH and 21 days exposure period. The tests were applied at different concentrations, 6 for spinosad, 5 for sweet almond oil and 4 for their mixtures. The results indicated that the mortality of tested insect increased with increasing in the concentration and the exposure period. The mortality of O. surinamensis adults reached 98.0% using a concentration of 1 × 10-3 % (w / w) of spinosad on the day 21 of the exposure. Data also revealed that, the spinosad pesticide was very toxic for the treated insect, and it gave LC50 of 8.6×10-4 % (w/w), for the adults of O. surinamensis (after 7 days exposure period). The mortality effect of sweet almond oil on O. surinamensis adults reached 98.0% at concentration of 5% (v/w) on the day 21 of exposure. Data showed that, the sweet almond oil gave LC50 of 4.521% (v/w), for the adults of O. surinamensis (after 7 days exposure period). The efficacy of the two tested compounds as a mixture at the various concentrations indicated that spinosad and sweet almond oil mixture of LC20 spinosad + LC20 sweet almond was the most effective compared with other mixtures against O. surinamensis on the basis of co-toxicity factor. | ||||
| Keywords | ||||
| spinosad; sweet almond; co-toxicity factor; combination; Oryzaephilus surinamensis | ||||
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