Antixenosis resistance to leaf miner Leucoptera coffeella in Coffea species

Abstract

The coffee leaf miner, Leucoptera coffeella, is the most important pest of Coffea arabica plantations in Brazil, and all cultivars are susceptible to the insect. However, distinct reactions have been observed in other species, such as C. congensis and C. canephora. In this work, the occurrence of antixenotic response was surveyed in individuals of Coffea species, selected for resistance to the leaf miner at both field and laboratory conditions. Tests performed on young plants from C. arabica cultivars Icatu Precoce IAC 3282, Mundo Novo IAC 515-20, Tupi IAC 1669-33 and Catuaí Amarelo IAC 62 demonstrated that these were preferred for oviposition when pooled with seedlings from C. canephora cv. Apoatã IAC 2258. Apoatã was also preferred over C. racemosa for oviposition. Similar results were observed in tests using detached leaves, and higher amount of eggs was counted in the cv Obatã IAC 1669-20 and Catuaí Vermelho IAC 81, and lower oviposition frequency was observed in C. canephora cv. Guarini IAC 1598. C. congensis showed an oviposition frequency between C. arabica and C. canephora. Also, the results suggest that the frequency of oviposition is co-related with the plant resistance level, during larvae infection.

Characterization and levels of resistance in Coffea arabica ×Coffea racemosa hybrids to Leucoptera coffeella

“…high mortality rates in the immature stages, weight reduction, deformities, and lowering of adults' reproductive potential.Although there are no studies in the literature on the effects of 'Siriema' genotypes on CLM oviposition, previous work has been done with its progenitors Matos et al (2011). studied the preference of CLM in genotypes of C. arabica, C. congensis, C. canephora, and C. racemosa.…”