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.
Chrysanthemum L. · Chrysanthemum
Vandenberg Cornelis P
Brassica oleracea L. (White Cabbage Group) · White cabbage
Seminis Vegetable Seeds
Ficus benjamina L. · Weeping fig
SOREN RINGAARD
Brassica oleracea L. (White Cabbage Group) · White cabbage
Clause Semences SA (FR)
Brassica oleracea L. (White Cabbage Group) · White cabbage
L. Daehnfeldt A/S
Brassica oleracea L. (White Cabbage Group) · White cabbage
Brassica oleracea L. (White Cabbage Group) · White cabbage
Pierre Hurier
Brassica oleracea L. (White Cabbage Group) · White cabbage
Ger Beemsterboer
Brassica oleracea L. (White Cabbage Group) · White cabbage
Syngenta Crop Protection AG
Brassica oleracea L. (White Cabbage Group) · White cabbage
Hazera Seeds B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
HAZERA SEEDS B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Ger Beemsterboer
Brassica oleracea L. (White Cabbage Group) · White cabbage
HAZERA SEEDS B.V.
Allium porrum L. · Leek
Enza Zaden Beheer
Brassica oleracea L. (White Cabbage Group) · White cabbage
KRYuChKOV ANATOLIJ VASIL'EVICh / MONAHOS GRIGORIJ FEDOROVICh / BONDARENKO LIDIYa DMITRIEVNA / KOROLEVA SVETLANA VIKTOROVNA
Brassica oleracea L. (White Cabbage Group) · White cabbage
Sakata Seed Corporation, JP
Brassica oleracea L. (White Cabbage Group) · White cabbage
Syngenta Seeds B.V.
Allium porrum L. · Leek
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
REED SEED (US)
Brassica oleracea L. (White Cabbage Group) · White cabbage
Twan Groot
Chrysanthemum L. · Chrysanthemum
MR. WILLIAM E. DUFFETT
Brassica oleracea L. (White Cabbage Group) · White cabbage
Twan Groot
Brassica oleracea L. (White Cabbage Group) · White cabbage
Rijk Zwaan B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Ger Beemsterboer