Pests
Curculionidae
Weevils are a family of insects that damage all plant parts at various stages of development. Varietal resistance to them is determined by anatomical and biochemical characteristics, although there is no unified international coding system for such resistance.
Mentioned in descriptions 387 varieties reference book.
Weevils constitute a vast family of insects whose adults and larvae damage any organs of cultivated plants, including buds, leaves, flower buds, fruits, and seeds. External symptoms of damage manifest as "weeping buds," drying of flower buds due to consumption, leaf shot-holes, as well as internal galleries in grains or fruits, which can lead to plant death if growing points are affected.
Varietal resistance to these pests is based on physiological and biochemical characteristics, such as the presence of specific metabolites and enzymes, as well as anatomical and morphological features: tissue density, degree of pubescence, and waxy bloom. In breeding, the resistance level is assessed by comparison with a susceptible control under identical conditions, and it can be both specific and polygenic in its buffering nature.
A unified international coding system for weevil resistance is not presented in open publications; therefore, information on varietal resistance is mostly descriptive, based on results of multi-year field trials. Selecting a specific cultivar in high infestation zones requires consultation with the originator, as the degree of resistance is a relative value dependent on agronomic practices, plant age, weather conditions, and potential evolution of pest biotypes.
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.
Festuca arundinacea Schreb. · Tall fescue
NEW ZEALAND PASTORAL AGRICULTURAL RESEARCH INSTITUTE
Triticum aestivum L. · Bread wheat
Saatzucht Donau GmbH & Co.KG
Triticum durum Desf. · Durum wheat
Groupement Agricole Essonnois (FR)
Trifolium pratense L. · Red clover
GIE-AM.FOURRAGERE
Festuca arundinacea Schreb. · Tall fescue
The State University of New Jersey - Rutgers (US)
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Stoppel Peter
Trifolium repens L. · White clover
Grasslanz Technology Limited (NZ)
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Simpson David
Helianthus annuus L. · Sunflower
PACIFICO
Trifolium repens L. · White clover
VANDINTER SEMO B.V.
Beta vulgaris Sugar Beet Group · Sugar beet
Syngenta Crop Protection AG
Brassica napus var. napus · Rapeseed
Gertz Andreas
Corylus avellana L. · Common hazel
Rolf de Vries
Capsicum annuum L. · Bell pepper
HAZERA GENETICS
Phaseolus vulgaris L. · Common bean
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Helianthus annuus L. · Sunflower
Interstate Seed Co.
Impatiens walleriana Hook. f. · Busy Lizzie
Uchneat Michael S.
Impatiens New Guinea Group · New Guinea Impatiens
SATO CHIHIRO|MINEMURA SHINJI
Brassica napus var. napus · Rapeseed
KWS, D
Gossypium hirsutum L. · Upland cotton
CALIFORNIA PLANTING COTTON SEED DISTRIBUTORS
Medicago sativa L. · Alfalfa
SEMILLAS FITO, S.A.
Triticum aestivum L. · Bread wheat
UCA SEM.PROVENCE
Brassica napus var. napus · Rapeseed
KWS SAAT SE&CO.KGaA, DE
Brassica napus var. napus · Rapeseed
UNIVERSITY OF GUELPH