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Pesquisa Agropecuária Brasileira

On-line version ISSN 1678-3921

Abstract

LEITE, GERMANO LEÃO DEMOLIN; PICANCO, MARCELO; AZEVEDO, ARISTÉA ALVES  and  GONRING, ALFREDO HENRIQUE ROCHA. EFFECT OF TRICHOMES, ALELLOCHEMICALS AND MINERALS ON THE RESISTANCE OF LYCOPERSICON HIRSUTUM TO TOMATO LEAF MINER. Pesq. agropec. bras. [online]. 1999, vol.34, n.11, pp. 2059-2064. ISSN 1678-3921.  http://dx.doi.org/10.1590/S0100-204X1999001100012.

The objective of this work was to study the effect of trichomes, alellochemicals and minerals in the leaves of different canopy heights on the resistance of Lycopersicon hirsutum to tomato leaf miner, Tuta absoluta (Lepidoptera: Gelechiidae). Effects of 2-tridecanone (2-TD), 2-undecanone (2-UD), N, P, K, Ca and Mg levels, density and types of trichomes and leaf area on apical, medium and basal parts of plant dossel of L. hirsutum and L. esculentum on the oviposition and mines number of T. absoluta was studied. Production of 2-TD increased from the bottom to the top of the canopy. The apical part of plants of L. hirsutum showed more antibiotic effect on the caterpillar. T. absoluta oviposited more on leaves of the apical and medium portion of the plants than in the basal parts of L. esculentum.

Keywords : tomato; Lycopersicon esculentum; 2-tridecanone; 2-undecanone; nitrogen; potassium; phosphorous; calcium; magnesium.

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