holes on green leaves bitten by pests. chrysomelidae leaf beetle eats green leaves, damaging plant. cruciferous flea

abstract agriculture background beetle bitten bug chloroplast chlorosis chrysomelidae courgette cruciferous cucumber damage damaged damaging deficiency disease eat eats elements fertilization flea floral foliage garden green holes illness impairment insect iron lack leaf leaky leaves macro magnesium nitrogen parasite pest pests phosphorus plant potassium season spot spring squash stomata vein weakness zinc zucchini