a hand holding a pear leaf with blister mite or eriophyes pyri.

affected agriculture black blister branch close closeup crop damage disease diseases eriophyes foliage fruit fusicladium garden gardening green growing hand hold holding infection insect leaf leaves macro mite orchard outdoor parasite parasites pathogenic pear pearleaf pest pests phytoptus pirinum plant problem pyri pyrifolia pyrina pyrus scab spot summer tree venturia