A quick guide to useful nitrogen fixing trees from around the world Leucaena Psyllids - A Review of the Problem and its Solutions Psyllids have caused severe damage since late 1982 to Leucaena in tropical and subtropical areas outside their native range in the Americas. More damage is expected as these psyllids spread around the world. Eggs are yellow, found primarily on young terminal leaves, and hatch in 2 to 3 days. Nymphs, which resemble aphids, undergo five instars over eight to nine days.
Adults are two to dime times the size of the largest nymphal instar.
Their reported color has ranged from green to brown to whitish. They use stout legs to jump before taking flight when disturbed. Females begin laying eggs 1 to 3 days after becoming adults. The Leucaena psyllid is native to the Caribbean, Mexico and Central and South America. Moving as uninvited passengers on aircraft or in high altitude winds, they arrived in Hawaii in 1984.