LABORATORY EVALUATION OF NATURAL PRODUCTS AND CHEMICAL COMPOUNDS FOR CONTROLLING TWO STORED GRAIN PESTS | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 4, Volume 1, Issue 9, September 2010, Page 711-723 PDF (383.87 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2010.86929 | ||||
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| Author | ||||
| Hoda M. Nasr | ||||
| Pest Control and Environmental Protection Dept., Fac. of Agric., Alexandria Univ. Damanhur | ||||
| Abstract | ||||
| The present study was carried out to evaluate the toxic activity of seven compounds, one organophosphorus (pirimiphos - methyl), two biocides (ivomic and Bacillum thruingiensis), two oils (K.Z mineral oil and Nitralo plant oil), one insect growth regulator (Cascade) and one organic acid (formic acid) against two important stored grain pests Trogoderma granarium and Tyrophagus putrescentiae by exposure to treated media. The effect of the mentioned compounds on the biology of tested pests, was also examined. The results indicated that pirimiphos – methyl was the most toxic compound with LC50 0.135 and 0.6 ug/gm for both T.granarium and T.putrescentiae at 24 hours post – treatment respectively. The least toxic compound was the mineral oil with LC50 values of 4300 and 210 ug/gm for T.granasium& T.patrescentiae respectively.There wase no signifigcant difference between the efficiency of the biocide ivomic and pirimiphos – methyl against T.putrescentiae. Cascade had more toxic effect on both tested species than the two different oils and formic acid. Results revealed that the same trend of toxicity was achieved for all tested toxicants against the larvae of T.putrescentiae . Results indicated that the mean number of larvae, pupae and emerged adults of T.granazium were highly affected by the different tested toxicants. Pirimiphos – methyl, ivomic and cascade had the same highest effect on the stages with reduction values of 100% Natrilo oil had the second rank with 83.78% reduction, while formic acid had the lowest effect with 45.9% reduction. Also, results showed that the mean number of eggs laid, hatchability, progeny and the percentage of sterility highly affected by the different tested toxicants. All tested compounds had significant on all tested parameters compared with control. | ||||
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