Pests
Thysanoptera
Thrips are small, cryptic, sap-sucking pests that damage plant tissues and transmit viral diseases. Resistance to them is complex and is more often described qualitatively rather than through strict immunity codes.
Mentioned in descriptions 1 399 varieties reference book.
Thrips are small insects with piercing-sucking mouthparts that inhabit leaf axils, buds, and flowers. Their presence is manifested by the appearance of silvery discolored spots, streaks, and dots, as well as deformation, leaf curling, and premature shedding of plant organs. Small black dots, which are the pest's excrement, are often visible on the affected parts.
Varietal resistance to thrips is determined by genetically defined physiological and biochemical properties, such as the content of specific metabolites. Unlike many pathogens, there are no generally accepted international resistance codes for thrips; therefore, this trait is usually indicated in descriptions as relative resistance or based on an assessment score of susceptibility.
The degree of plant damage directly depends on external conditions, the age of the crop, and the pressure intensity of the pest population, which is capable of forming new biotypes. Genetic resistance to thrips is polygenic; therefore, under field conditions, even resistant genotypes may demonstrate varying reactions depending on the agro-ecosystem and the overall level of preventive measures.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Brassica oleracea L. (White Cabbage Group) · White cabbage
TAKII EUROPE B V
Brassica oleracea L. (White Cabbage Group) · White cabbage
Hazera Seeds B.V.
Allium porrum L. · Leek
Bejo Zaden B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Sakata Seed Corporation (SCC)
Brassica oleracea L. (White Cabbage Group) · White cabbage
Hazera Seeds B.V.
Plectranthus scutellarioides (L.) R. Br. · Coleus
Florida Foundation Seed Producers, Inc. / University of Florida
Verbena L. · Vervain
Syngenta Participations AG
x Petchoa J. M. H. Shaw · Petchoa
Moriya Kawashima
Gladiolus L. · Gladiolus
Coöperatieve Kwekersvereniging "For Ever" U.A.
Nemesia Vent. · Nemesia
SIDNEY JAMES JONES|DAVID JAMES JONES
Dracaena fragrans (L.) Ker Gawl. · Corn plant
GAMBOA CECILIANO JULIO
Chrysanthemum L. · Chrysanthemum
Persson Kjell Aake
Begonia x tuberhybrida Voss · Tuberous begonia
Timothy Edward Kerley^^^David William Kerley^^^Priscilla Grace Kerley^^^Sarah Elisabeth Kerley
Gaillardia aristata Pursh · Blanketflower
Loonen Rik Petrus Louis
Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy
Silvia Hofmann|SUSANNE HERDEGEN
Cuphea hyssopifolia Kunth · False heather
Florensis B.V.
Chrysanthemum L. · Chrysanthemum
Arie Gerard Post
Erysimum linifolium (Pers.) J. Gay · Wallflower
Trees Scott C
Penstemon Schmidel. · Beard Tongue
Valentin Taquet^^^Christa Kievit
Agastache Clayt. ex Gronov. · Giant hyssop
Kievit Christa
Agastache Clayt. ex Gronov. · Giant hyssop
Kievit Christa
Brassica oleracea L. (White Cabbage Group) · White cabbage
TAKII EUROPE B V
Brassica oleracea L. (White Cabbage Group) · White cabbage
Hazera Seeds B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
TAKII EUROPE B V