POSSIBILITIES FOR CONTROL OF THE SOUTH AMERICAN LEAFMINER (LIRIOMYZA HUIDOBRENSIS) ON CUCUMBERS IN GREENHOUSES

The South American leafminer Liriomyza huidobrensis was established in Bulgaria after 1996 and is among the important pests of cucumber in greenhouses.
A study was conducted during 2004–2008 in Maritsa Vegetable Crops Research Institute in Plovdiv, Bulgaria, to evaluate the efficacy of five insecticides to the larvae and adults of the leaf miner, and its preference to 13 cucumber cultivars and lines.
The experiments were carried out in a glasshouse and at a laboratory.
The efficacy of the insecticides was tested on the larvae four and seven days after application, and on the adults, 24 hours after application.
The bio-insecticides from the group of avermectines Lirosekt 2 EC and Vertimec 018 EC showed high efficacy against both the adults and the larvae, Marshal 25 EC from the group of carbamates was highly effective against the larvae 7 days after the treatment, the pyrethroid Talstar 10 EC and the neonicotinoid Picador 20 SL showed high efficacy against the adults.
After comparing the number of mines per leaf the cultivars ‘Diva’ (0.45), ‘Polaris’ (2.32) and ‘Odnosteblenii’ (2.57) proved to be the least preferred.
The greatest number of mines was recorded on ‘Gergana’ (5.41) and ‘Starozagorski langi’ (5.79). Two parasitoids – Dacnusa sibirica and Diglyphus isaea, were found to parasitize on the larvae of the leaf miner.
The degree of parasitism reached 35.8% in early July and D. isaea was the predominant species.

IV Balkan Symposium on Vegetables and Potatoes

V. Yankova, N. Velkov, V. Harizanova, A. Stoeva

Liriomyza spp., Cucumis sativus, host-plant preference, pest control, parasitoids, greenhouses

https://doi.org/10.17660/ActaHortic.2009.830.95