ORIGINAL ARTICLE
The effect of some herbal extracts and pesticides on the biological parameters of Bemisia tabaci (Genn.) (Hem.: Aleyrodidae) pertaining to tomato grown under controlled conditions
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1
Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University, Rafsanjan, 518 Iran
2
Department of Life Sciences Engineering, Faculty of New Sciences & Technologies,
University of Tehran, Tehran, 14174 Iran
Submission date: 2012-04-24
Acceptance date: 2012-05-16
Journal of Plant Protection Research 2012;52(4):375-380
KEYWORDS
TOPICS
ABSTRACT
The sweet potato whitefly,
Bemisia
tabaci
(Genn.) (Biotype A: Hem.: Aleyrodidae) is one of the most important pests in Iran.
The development of alternative methods that are not chemical applications, is necessary in pest management for the sake of human
health and for the safety of the environment. In this research project, the effect of four herbal compounds
Fumaria parviflora
Lam.
(Fu-
mariaceae),
Teucrium polium
L.
(Lamiaceae)
, Calotropis procera
(Willd.) R. Br.
(Asclepiadaceae)
, Thymus vulgaris
L.
(Lamiaceae)
on the
same biological parameters of cotton whitefly were compared with the insecticides azadirachtin and pymetrozin.
The results showed significant differences between herbal compounds and insecticides on: egg longevity (F
6, 39
= 2.96, p < 0.05), pupa
longevity (F
6, 37
= 4.49, p < 0.01) and adult longevity (F
6, 31
= 4.47, p < 0.01); egg mortality (F
6, 39
= 6.71, p < 0.001), total egg mortality
(F
6, 39
= 6.71, p < 0.001), sex ratio (female) (F
6, 30
= 3.49, p < 0.01), oviposition period (F
6,31
= 7.50, p < 0.001) and total fecundity/female
(F
6, 31
= 8.23, p < 0.001).
These results indicated that a fumitory extract and pymetrozin had the best effect on longevity and mortality, respectively. According
to the results, the fumitory had a noticeable effect on the different life stages of the sweet potato whitefly.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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