Faculty of Biology, University of Latvia
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Environ Exp Biol (2017) 15: 201–208
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Environmental and

Environ Exp Biol (2017) 15: 201–208

Orginal Paper

Population changes of Tuta absoluta (Gelechiidae) and fruit loss estimates on three tomato cultivars in greenhouses in Biskra, Algeria

Farid Allache1*, Fatma Demnati1,2, Mohamed Amine Houhou3
1 Department of Agricultural Sciences, University of Biskra, BP 145 RP, 07000 Biskra, Algeria
2 Laboratory of Ecosystem Diversity and Agricultural Production System Dynamics in the Arid Areas (DEDSPAZA), University of Biskra, BP 145 RP, 07000 Biskra, Algeria
3 Direction of Agricultural Statistics (DSA), 07000, Biskra, Algeria
* Corresponding author, E-mail: f.allache@univ-biskra.dz, allachefarid@yahoo.fr


The aim of this study was to monitor Tuta absoluta population development in greenhouse conditions on different tomato cultivars. All pest stages were present on all the cultivars. The development of T. absoluta was variable and depended both on temperature and tomato cultivar. Losses due to development of T. absoluta larvae on the fruit were estimated at 43.3% on cv. ‘Sahara’, 3% on cv. ‘Dawson’, and 17% on cv. ‘Toufan’. Percentage of fruit losses was positively correlated with increase in number of larvae. The attacks were more severe during the spring period with rising temperatures. Strong applications of pesticides used to control various tomato pests resulted in absence of antagonists in the greenhouse. Cultivars ‘Toufan’ and ‘Dawson’ were less suitable for cultivation in conditions of heavy leaf miner infestation; this characteristic may be associated with other control methods to reduce plant damage.

Key words: fruit losses, population changes, tomato, Tuta absoluta.

Environ Exp Biol (2017) 15: 201–208
 DOI: http://doi.org/10.22364/eeb.10.22364/eeb.15.20

Prof. Gederts Ievinsh

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University of Latvia

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