Graduate Thesis Or Dissertation
 

Interaction between hazelnut (Corylus avellana L.) shoot development and big bud mite (Phytoptus avellanae Nal. and Cecidophyopsis vermiformis Nal.)

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  • The influence of environmental and genetic variation in plant morphology and development on eriophyoid bud mite (Phytoptus avellanae Nal. and Cecidophyopsis vermiformis Nal.) behavior, survival and colonization on Corylus avellana L. was studied. The distribution pattern of galled buds was consistent with the observation that mites colonize only those buds which form during the mite migration period. Our research suggested that the point of entry was the growing shoot tip, and that mites are carried passively as the shoot elongates and gain access to a succession of newly formed, unprotected primordial buds. Mites which penetrate to the apical meristem can cause leaf and shoot distortions. The relative accessibility of the apical meristem and bud primordia may affect the degree of susceptibility of the host plant. Experiments were conducted and observations made to study mite-plant interactions relevant to host plant resistance.
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