OCCURRENCE AND INJURIOUS EFFECTS OF RHIZOGLYPHUS ECHINOPUS - A NEW PEST OF HEMEROCALLIS HYBRIDA

G.S. Labanowski, G. Soika
Acarid mites belonging to genus Rhizoglyphus and Tyrophagus were known earlier in Poland as pests of freesia corms and lily, narcissus and tulip bulbs. In 1991 it was found that Rhizoglyphus echinopus (Fumoze & Robin) can be also a serious pest of Hemerocallis hybrida cultivated in foliar tunnels. Severe damage of subsoil stem parts, shoots, leaves and flower buds was observed. Consequence of mite feeding was inhibition and deformation of leaves and flower shoots, appearance of brownish streaks and scars on shoots, leaves and flower buds. From about 100 plants checked, almost 35% were damaged by acarid mites at different degrees: 9.4% severe, 10.4% medium and 14.6% slight.
Labanowski, G.S. and Soika, G. (1992). OCCURRENCE AND INJURIOUS EFFECTS OF RHIZOGLYPHUS ECHINOPUS - A NEW PEST OF HEMEROCALLIS HYBRIDA. Acta Hortic. 325, 739-742
DOI: 10.17660/ActaHortic.1992.325.107
https://doi.org/10.17660/ActaHortic.1992.325.107

Acta Horticulturae