Phytoparasitica (2019) 47, 505-511

Bárbara Monteiro de Castro e Castro, Marcus Alvarenga Soares, Valter Carvalho de Andrade Júnior, Evander Alves Ferreira, José Eduardo Serrão and José Cola Zanuncio (2019)
Morphological characters of resistant and susceptible Ipomoea batatas genotypes to Tetranychus ludeni (Acari: Tetranychidae)
Phytoparasitica 47 (4), 505-511
Abstract: Plant morphology has been associated with the resistance or susceptibility to herbivores. The objective was to identify morphological characters involved in resistance genotypes Ipomoea batatas from the germplasm bank of the University Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) to Tetranychus ludeni. Natural infestations of T. ludeni were observed in 54 sweet potato genotypes from the Vegetable Crops sector of UFVJM in a greenhouse. Morphological characters as the number of leaf trichomes, quantity of epicuticular wax on the leaves, leaf area and thickness of the cell wall cuticle and epidermis, were analyzed in five more susceptible (BD 29, BD 08, BD 57, BD 17 e Espanhola) and the five less susceptible (BD 03, BD 31 TO, Brazlândia, Branca, Marmel e BD 33) sweet potato genotypes to this mite. The genotypes, except the BD 29, showed glabrous leaves. The quantity of wax extracted from more susceptible to T. ludeni was lower. The wax of resistant plants may reduce feeding by T. ludeni. The thickness of the cuticle and cell wall of the leaves is not involved in the selection process. Glabrous leaves with lower leaf area and greater quantity of wax epicuticular per leaf increase resistance of this plant to T. ludeni.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): José Eduardo Serrao, José Cola Zanuncio

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus ludeni	Sweet potato (Ipomoea batatas)	Brazil (south)