JBiopest 11(2): 114-120 (2018) Trap crop and mycorrhizae against leafminer © 550 Integrated management of leaf miners Liriomyza spp. (Diptera: Agromyzidae) on shallot crops by trap cropping system and arbuscular mycorrhizae Shahabuddin Saleh*, Alam Anshary and Usman Made ABSTRACT Integrated pest management (IPM) has been recognized as the best solution to minimize the adverse effects of insecticides applied to farmland. This study aims to evaluate the effectiveness of the trapping crop system (TCS) and arbuscular mycorrhizae (AM) against leaf miner, an important horticultural pest throughout the world including on shallot crops in Indonesia. In a factorial research design, cucumbers use in TCS was planted in three different pattern: one rows in the center; TC1, two rows in the middle; TC2, and one-row surroundings the shallot; TC3, while AM consists of two levels that are with (M1) and without AM (M2) application. The variables measured were: population and infestation of leaf miners as well as parasitism at the main and trap crops. The results showed that the leaf miners population was significantly reduced by TCS application but had no relation with AM. The leaf miners population decreased by about 40.1% at the TCS compared with the controls. However, the combination of TCS and AM reduced the leaf miner infestation by about 47.5% where TC3M1 showed the best treatment against leaf miners. Increasing of the parasitoids population and parasitism at the shallot and cucumbers as trap crops as well as the shallot resistance against leaf miner may explain the compatibility of TCS and MA to manage the pest. The study denoted the importance of IPM against shallot leaf miners to support sustainable farming system. Keywords: Sustainable management, leaf miners, shallot, natural enemies MS History: 01.10.2018 (Received)-10.10.2018 (Revised)-23.11.2018 (Accepted). Citation: Shahabuddin Saleh, Alam Anshary and Usman Made. 2018. Integrated management of leaf miners Liriomyza spp. (Diptera: Agromyzidae) on shallot crops by trap cropping system and arbuscular mycorrhizae. Journal of Biopesticides, 11(2): 114-120. INTRODUCTION Efforts to reduce yield losses due to pests and plant diseases are increasingly triggering the use of chemical pesticides in agricultural land. It was predicted that on a global scale the production of pesticides will be 2.7 times higher in 2050 than in 2000 (Sexton et al., 2007). This also occurs in Indonesia where the registered brands of pesticides have been double increased from 1500 in 2006 to 3207 by 2016 (DG of PSP 2006, 2016). As a result, a high residue of pesticides on soil and crops has been recorded in Indonesia including chlorpyrifos residue in the shallot tubers at one of the shallot cultivation centers in Central Sulawesi Indonesia (Jamaluddin et al., 2015). Unfortunately, insecticides application has been increasing of the leaf miner resistance to insecticides (Ferguson, 2004; Silva et al., 2015) and decreasing of the natural enemies population and their role as biocontrol agents (Hidrayani et al., 2005; Hernandez et al., 2011). It is not surprising that an excessive use of pesticides significantly increases the economic and environmental costs (Pimentel and Burgess, 2014; FAO, 2017). Therefore, more sustainable alternative controls are needed to mitigate the adverse effects of insecticides by combining several compatible control techniques in accordance with the concept of integrated pest management (IPM) (Barzman et al., 2015).