Scale insects and mosquitos will sometimes breed in the pools of water that are trapped between the leaves.
Scale insects have been reported to cause unsightly reddish spots on leaves during late summer.
Yucca gigantea may be subject to a number of pests including scale, Yucca moth borers, and black weevils.
Richter magnitude scale | scale | Moment magnitude scale | Fujita scale | Scale model | scale model | Scale insect | Rostral scale | Cricket (insect) | Scoville scale | Mercalli intensity scale | International Scale of River Difficulty | International Centre of Insect Physiology and Ecology | Insect mouthparts | Beaufort scale | Synoptic scale meteorology | Supralabial scale | Small-scale agriculture | Silvius (insect) | Rankine scale | moment magnitude scale | Medvedev–Sponheuer–Karnik scale | Insect migration | Hamilton Rating Scale for Depression | Wechsler Adult Intelligence Scale | Vossia (insect) | ''Vossia'' (insect) | Truck scale | TORRO scale | Tanner scale |
Aulacaspis yasumatsui is a scale insect and a pest towards C. revoluta, able to destroy the plant.
Kuwanaspis linearis, the bamboo long scale, a scale insect species in the genus Kuwanaspis
The variant Nectria coccinea var. faginata causes beech bark disease, and can infect the tree via the feeding holes made by the beech scale insect Cryptococcus fagisuga.