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
Jonh Pieter Schipper
Bouvardia Salisb. · Bouvardia
JOHN M.F.DE JOHN
Brassica oleracea L. (White Cabbage Group) · White cabbage
Syngenta Seeds B.V.
Allium porrum L. · Leek
NUNHEMS
Brassica oleracea L. (White Cabbage Group) · White cabbage
VAN DER PLOEG SJAAK
Brassica oleracea L. (White Cabbage Group) · White cabbage
MONSANTO VEGETABLE IP MANAGEMENT BV , NL
Brassica oleracea L. (White Cabbage Group) · White cabbage
MONSANTO HOLLAND BV , NL
Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage
RIJK ZWAAN WELVER GmbH, DE
Gossypium hirsutum L. · Upland cotton
MONSANTO TECHNOLOGY
Begonia x hiemalis Fotsch · Elatior Begonia
LUBBERTUS H.KOPPE
Brassica oleracea L. (White Cabbage Group) · White cabbage
SYNGENTA SEEDS B.V.
Petunia Juss. · Petunia
Ushio Sakazaki Suntory Flowers Limited
Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy
Hammond, Frank|100 Boundary Road, Narre Warren East Victoria, 3804, Australia
Guzmania Ruiz et Pav. · Guzmania
Nicolaas D.M. Steur^^^Elly Bak
Brassica oleracea L. (White Cabbage Group) · White cabbage
TAKII EUROPE B V
Brassica oleracea L. (White Cabbage Group) · White cabbage
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL BV, NL
Brassica oleracea L. (White Cabbage Group) · White cabbage
BEJO ZADEN B.V, NL
Anthurium-Andreanum-Hybriden · Anthurium
RijnPlant B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Seminis Vegetables (NL)
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Brassica oleracea L. (White Cabbage Group) · White cabbage
Allium fistulosum L. · Welsh onion
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry