| Abstract [eng] |
Tomato leafminer Liriomyza bryoniae is one of the most abundant pest species in the industrial tomato greenhouses in Lithuania and Europe. The abundance of L. bryoniae most often is controlled by using chemical pesticides. One of the alternatives for traditional insecticides might be environmentally friendly, non-toxic photoinsecticides. Those are photoactive organic compounds (photosensitizers) which can accumulate within different organisms including insects, and following exposure to visible light induce lethal photochemical reactions and the death of an organism. Usually photosensitizers are incorporated into nutrition medium of insects, or baits containing various nutrients (e.g., different sugars). Knowing that tomato leafminers locate and recognize the suitable host-plants by plant-emitted volatiles, such plant-origin compounds (kairomones) could be used for insects’ attraction to the bait with photosensitizer. The aim of the study was to determine kairomones emitted by tomato leafminer Liriomyza bryoniae host-plants and investigate the effect of photosensitizers on tomato leafminer by choosing the most effective photosensitizing agent. Literature review chapter describes the biology of genus Liriomyza, mechanisms involved in host-plant location and recognition by leafminers as well as the damage these pests induce to economically important agricultural plant. The control tools against tomato leafminer, the historical background and current perspectives of the use of kairomones and sunlight activated photoinsecticides (photosensitizers) are also discussed. Results of the researsh revealed that the photosensitizer hematoporphyrin dimethyl ether obtained by L. bryoniae adults induces lethal effects in the insects exposed to the sunlight. Also, the first attractant for tomato leafminer was determined which can be attributed to kairomones. This kairomone can be an effective extra tool increasing the ‘sensitivity’ of the monitoring traps and also could be used for the attraction of the pest to the bait with photosensitizer. |
