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The tomato leaf miner (TLM), Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), is one of the major pests that attacks commercial tomato. TLM is becoming resistant to many of the pesticides used in the tomato fields. A potential alternative method of control is host plant resistance, which may be mediated by glandular trichomes. We studied glandular and non-glandular trichomes potentially related to tomato resistance of nine tomato genotypes ( Lycopersicon hirsutum Humb & Bonpl), extensively cultivated in western Iran. The antixenosis and/or antibiosis effect of the genotypes Mobil, Falat 3, Cal J N3, Dehghan, Super Strain B, Rio Grande, King Ston, Early Urbana and Peto Mech were evaluated under greenhouse conditions (25 ± 1°C, 65 ± 5% R.H., photoperiod of L16: D8 h). TLM elicited the lowest egg-laying response on Peto Mech, Rio Grande and King Ston; and the highest one on Dehghan. King Ston and Mobil allowed the lowest and highest larvae density on the leaves, respectively. The highest preference was observed on Mobil and the lowest one on Rio Grande and King Ston. Moreover, trichome type and density of the assayed genotypes appeared to be related to TLM population density: the most infested genotype (Mobil and Cal J N3) displayed the lowest IV and VI trichome style ranks of leaf blade, vein and domatia (glandular trichomes). Significant negative relations were found between egg and larvae density with leaf I style trichome; and also larvae and adult density with IV and V style trichome. Finally, this preliminary study screened two genotypes (Rio Grande and King Ston) quite promising for developing resistance programs in western Iran against TLM.

ecologica montenegrina

&lt;p&gt;&lt;strong&gt;ROLE OF DIFFERENT TRICHOME STYLE IN THE RESISTANCE OF &lt;em&gt;LYCOPERSICON HIRSUTUM&lt;/em&gt;&lt;/strong&gt; &lt;strong&gt;GENOTYPES TO&lt;em&gt; TUTA ABSOLUTA &lt;/em&gt;(MEYRICK)&lt;em&gt; &lt;/em&gt;(LEPIDOPTERA: GELECHIIDAE)&lt;em&gt; &lt;/em&gt;&lt;/strong&gt;&lt;/p&gt;