sick vine leaves close-up affected by colomerus vitis in summer

agriculture alpes auvergne bad botany close color condition conservation crop cultivated damaged development disease diseased environment environmental eriophyid extreme fragility gall gardening grape green growth heat horizontal illness infectious injury insect issues leaf lifestyles mildew mite nature organic parasitic pathogen people photography physical plant plantation rhaacute ne social spotted stage summer sunlight sunny swollen temperature ugliness wave weather