The topical specificity of the whitefly Trialeurodes vaporariorum in relation to morphological and anatomical features of cucumber cotyledon leaves

The Trialeurodes vaporariorum first instars (crawlers) are mobile and able to choose the optimal spots on leaf for 
 constant feeding favorable pest development. Spatial distribution of larvae adults cucumber Ginga F1 cotyledon leaves, as well morpho-anatomical structure cotyledons cross sections have been studied in laboratory. Some differences topology sites between were revealed. Females occupying underside preferred feed lay eggs mainly basal part cotyledons. Unlike adults, highest number crawlers chose marginal zone leaves feeding. Larvae concentrated along perimeter forming a band 1–1.5 mm wide. We demonstrated that choice by was most likely associated with specific features leaf. showed conductive bundles phloem their lower located border palisade spongy parenchyma. height parenchyma decreased from central edges 2–3 times. whitefly is an insect feeds content sieve elements, so we assume shorter length piercing stylet allow only this variety, contrast adults.