Pests
Tetranychus urticae
The spider mite is an arachnid that damages plants by sucking out cell sap and chlorophyll. The damage manifests as yellowing, curling, and drying of leaves, which leads to a significant reduction in yield.
Mentioned in descriptions 1 326 varieties reference book.
The spider mite is a dangerous pest that pierces the leaf epidermis and sucks out cell sap, leading to the destruction of chloroplasts and the inhibition of photosynthesis. Initial signs of infestation include the appearance of small light spots on the upper side of the leaf. In advanced cases, a fine web and colonies of the pest are found on the underside of the leaf, and the plant itself turns yellow, dries up, and can lose up to 60% of its yield.
The rate of reproduction and the degree of damage directly depend on temperature and humidity: at +25...+30°C and humidity below 60%, the pest's development cycle shortens to 5–7 days. A favorable factor for mite feeding is excessive nitrogen nutrition, which makes plant tissues looser. Furthermore, crop vulnerability often depends on agronomic practices, as mites are prone to developing resistance rapidly.
A variety's resistance to spider mites is determined by morphological features, such as leaf blade density or the presence of trichomes, as well as biochemical characteristics. No unified international coding system for such resistance exists; therefore, in descriptions, it is usually assessed qualitatively as "tolerance" or "relative resistance." When selecting a variety, it is recommended to clarify the evaluation methodology, including the conditions of field trials or artificial infestation.
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.
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Mr. Jimmy Bagdasarian, Lassen Canyon Nursery, Inc
Persea americana Mill. · Avocado
Martin, Gray E.|Moreno Valley, CA / Bergh, Berthold O.|Riverside, CA
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
THOMAS M/AMADO Q./JOSPH I
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
The Regents of the University of California
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
UNIVERSITY OF CALIFORNIA WOLFSKILL EXPERIMENTAL ORCHARD
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
UNIVERSITY OF CALIFORNIA WOLFSKILL EXPERIMENTAL ORCHARD
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
UNIVERSITY OF CALIFORNIA WOLFSKILL EXPERIMENTAL ORCHARD
Fragaria L. · Strawberry
The Regents of the University of California
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Reinhold von Sengbusch, Germany
Ribes nigrum L. · Blackcurrant
Scottish Crop Research Institute, GB
Malus domestica (Suckow) Borkh. · Apple
Frederico Dernadi / Anisio Pedro Camilo
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Wassenaar, L.M.
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
UNIV.DE CALIFORNIA
Ribes nigrum L. · Blackcurrant
SCOTTISH CROP RESEARCH INSTITUTE
Rosa L. · Rose
Schreurs, P.
Rubus idaeus L. · Red raspberry
The New Zealand Institute for Plant and Food Research Limited, The New Zealand Institute for Plant and Food Research Limited
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Steven D. Nelson Michael D. Nelson Leo W. Stoeckle Daniel S. Nelson
Corylus avellana L. · Common hazel
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Michael D. Ferguson, Terrance C. Moran, Josefa Lagunas, Driscoll Strawberry Associates, Inc.
Aloe L. · Aloe
De Wet Charles Andrew,Bean Quinton
Ribes nigrum L. · Blackcurrant
Rudolf Bauer
Ribes nigrum L. · Blackcurrant
Stanislaw Pluta
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Solanum melongena L. · Eggplant
HM.CLAUSE