Pericarp Browning

Browning of the pericarp occurs at ambient temperatures of 20-30°C within 24 hours of harvest. Water loss (desiccation) of litchi results in brown spots on the bright-red shell (pericarp). Under severe conditions or prolonged exposure, packaging in polymeric films reduces water loss and browning severity.

Algal rust: It is caused by an algal parasite Cephaleuros mycoides. The disease first appeared on the young unfolded tender branches. On the infected young leaves, small lesions of velvety white growth appear on the lower surface. On the upper surface, just the opposite site of the lesion, chlorotic patches occur. As the leaves unfold and increase in size, the velvety growth becomes more prominent and dense. Later larger areas of leaves are affected with this growth. Old and thick leaves show various types of malformation.

Fruit drop is one of the most wide spread problem. The initial fruit set in litchi is very high but a very small proportion finally matures. The premature fruit drop starts soon after fruit set and continues till fruit maturity. The main causes of fruit drop are due to embryo abortion, internal nutritional status, hormonal and external factors like high temperature, low humidity, strong winds, etc.