Caused by aphid. Green, marble-shaped galls found on the leaf petioles. Caused by mite. Form cauliflower-like growth on leaf buds. Caused by aphid.
Infested leaves are reddish and twisted, later turning brown.
Caused by mite. Infest male flower clusters causing irregular growths. Caused by fly midge. Leaflets form hollow pods which eventually turn brown. Caused by flies and tiny wasps.