Rhizome scale (Aspidiotus hartii, Diaspididae,Hemiptera)
Damaging stage: nymph and adult
Damaging symptoms: infested plants become weak, pale and withered in the field that results in shrivelling of rhizomes and buds, infest rhizomes both in field and storage.
Identification
- Scales are minute, circular, light brownish to grey with a thin pale It reproduces either ovovivparously or parthenogenetically.
- Adult is yellow to deep yellow in colour.
Management
- Apply well rotten sheep manure / poultry manure in two splits @ 10 tons/ha,
- Soak seed rhizomes, in insecticide solution of either dimethoate 30 EC or phosalone 5 ml/L 1.5 ml/L or
- dichlorvos 5 ml/L for 15 min. for storing.