Integrated Management of the leaf miner fly Liriomyza huidobrensis
A brief description of the research area
The leaf miner flies, Liriomyza spp. are regarded as among the most important pests of horticultural field crops in the tropics and subtropics. The genus Liriomyza is believed of Neotropic origin and was restricted to the New World until the mid 1970s. But since then, these species were rapidly spreading to other areas, and are presently reported in several countries of Latin America, Africa, Asia and the New World.
The most common species, L. sativae, L. trifolii and L. huidobrensis are characterized by their high degree of polyphagy and the extent to which they have invaded new geographic regions. L. huidobrensis is believed to have become a serious pest of potato in the central coast of Peru as a result of indiscriminate insecticide over-use against the potato tuber moth, Tuta absoluta. Since the 1980s, 10-13 sprays per season were used against leaf miner flies in potato with the consequence that in many places leaf miner flies are showing significant levels of resistance to all major classes of insecticides. Crop losses in South America due to leaf miner range from 30 to 50% despite the use of non-selective chemical applications.
To achieve the goal to reduce the amount of insecticide application, CIP?s scientists test and develop location-specific integrated pest management practices based on pest monitoring, host plant resistance, use of botanical and selective insecticides, and the use of bioagents and parasitoids, which have been found to be effective in keeping leaf* * miner fly populations at sub-economic levels. The project will make extensive efforts to fine-tune identified IPM practices and extend them to farm communities in multiple locations. To facilitate this process, the project provides participating national programs extensive training opportunities both in IPM applied research and extension in methodologies through Training of Trainers (TOT) and Farmer Field Schools (FFS).
Specific research areas and expected outputs:
Agroecozone(s)/Location(s): Agro-ecologies in South America (highlands of Peru, Bolivia and Ecuador, coastal areas in Peru).
Description of the pest :Liriomyza huidobrensis