Diseases and disorders of rubber plant (Hevea brasiliensis Muell.
Arg.) so far recorded from Bangladesh have been reviewed. An
important leaf spot disease caused by Corynespora cassiicola (Bark and
Curt.) Wei in January, 1985 and a root rot by Fusarium sp. in
December, 1985 respectively at Ramu and Khagrachari rubber
nurseries have been described. A severe dieback of grafted rubber
seedlings at Kanchonnagar and Raozan rubber nurseries in 1985 was
found primarily owing to very poor new root regeneration on transfer
to polyethylene bag and secondarily due to the attack by Phomopsis
hevae (Petch) Boedijn. During October, 1985 about 50% mortality
occurred in bud wood nursery stock of alone PB—235 at Haludia
rubber estate because of the phytotoxic effect of Elite Paint 713 (TR-Blue).
Ganoderma pseudoferrum (Wakef.) Overecm and Steinm caused root rot
in 1972 .ubber plantation at Dantmara. Yellowing of rubber seedlings
of clone PBIGG at Khagrachari was due to nutrient deficiency.