Journal of Crop Protection
Journal of Crop Protection
JCP
Agriculture
http://jcp.modares.ac.ir
1
admin
2251-9041
2251-905X
en
jalali
1395
3
1
gregorian
2016
6
1
5
2
online
1
fulltext
en
Contact and fumigant toxicity of Foeniculum vulgare and Citrus limon essential oils against Tetranychus turkestani and its predator Orius albidipennis
<em>Tetranychus turkestani</em> is one of the most important pests of greenhouse plants in the southern provinces of Iran. Several benefits of using essential oils over chemical pesticides make them appropriate for IPM programs. Contact and fumigant toxicity of the essential oils of <em>Foeniculum vulgare</em> and <em>Citrus limon</em> against the spider mite and its predator, <em>Orius albidipennis</em> were investigated under laboratory conditions. Contact toxicity experiments were conducted at six concentrations, (0, 50, 100, 300, 800 and 2000 ppm) of each essential oil on the mature and immature life stages of the pest, and mortalities were recorded 72 h after exposure. In fumigant toxicity trials, LC<sub>50</sub> values of the essential oils were determined on different developmental stages of <em>T. turkestani </em>and <em>O. albidipennis</em>. At 800 and 2000 ppm, both essential oils had high contact toxicity on the eggs, 2<sup>nd</sup> instar nymphs and adults of <em>T. turkestani</em>, while the same concentrations caused less mortality on <em>O. albidipennis</em>. No significant phytotoxicity of the essential oils was observed. The mortality rates of <em>T. turkestani </em>and <em>O. albidipennis</em> increased as concentration was increased. Also, the 2<sup>nd</sup> instar nymph of <em>T. turkestani</em> was more sensitive to contact application of the essential oils than other developmental stages. In the fumigant toxicity bioassay, LC<sub>50</sub> values of the essential oil derived from<em> F. vulgare</em> on the egg, 2<sup>nd</sup> instar nymph and adult of <em>T. turkestani </em>were 16.08, 7.98 and 14.06, and the values for <em>C. limon</em> essential oil were 11.6, 9.86 and 11.52 µl × l<sup>-1</sup>air, respectively. The highest fumigant toxicity was observed against the 2<sup>nd</sup> instar nymphs of the mite. Fumigant toxicity of the essential oils was lower against <em>O. albidipennis</em> than against <em>T. turkestani</em>. This data suggests that the essential oils of these plants have the potential of being employed in the IPM programs of <em>T. turkestani</em> in greenhouse crops, especially cucumber.
Essential oils,contact toxicity,fumigant toxicity,Phytotoxicity
283
292
http://jcp.modares.ac.ir/browse.php?a_code=A-3-11694-1&slc_lang=en&sid=3
Niloufar
Faraji
Niloufar
Faraji
100319475328460061917
100319475328460061917
No
Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University, Ahvaz, Iran.
Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University, Ahvaz, Iran.
Ali Asghar
Seraj
Ali Asghar
Seraj
100319475328460061918
100319475328460061918
Yes
Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University, Ahvaz, Iran.
Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University, Ahvaz, Iran.
Fatemeh
Yarahmadi
Fatemeh
Yarahmadi
100319475328460061882
100319475328460061882
No
Department of plant protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khouzestan, Ahvaz, Iran.
Department of plant protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khouzestan, Ahvaz, Iran.
Ali
Rajabpour
Ali
Rajabpour
100319475328460061883
100319475328460061883
No
Department of plant protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khouzestan, Ahvaz, Iran.
Department of plant protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khouzestan, Ahvaz, Iran.