Phytomyza atricornis, , SSCBI, Dizstende, 2011

Salmane, Ineta, Apenīte, Ilze & Ciematnieks, Rinalds, 2013, Environmentally Friendly Organic Products And Onion Pests In Latvia, Acta Biologica Universitatis Daugavpiliensis 13 (1), pp. 101-108 : 103-104

Phytomyza atricornis

In the vegetation season 2011 no adults of onion leaf miner were found on sticky traps. They were recorded only in the last assessment time in 2012 ( Fig. 1 ). Nevertheless in the control plots damage level caused by P. atricornis maggots was 5.0- 10.0%, but in the treated plots - 0-31.3% per assessment time in 2011. The highest amount of damaged onion plants was recorded at the second 2012. (Only treatments in any assessment time having non-zero values are shown)

assessment time (BBCH 31).

The recorded amount of damaged onion plants was obviously lower in 2012, and treated plots did not differ significantly from control plots ( Table 1). No clear effect of applied extracts on P. atricornis was observed in the vegetation seasons 2011-2012.

Figures

Fig. 1. Average number of individuals of D. antiqua, A. assectella and Ph. atricornis recorded on the yellow sticky traps in onion plantations, SSCBI, Dižstende. a) vegetation season 2011, b) vegetation season 2012. (Over a vegetation season, 1 - 6 times sticky traps were exposed).