Date: 16 Feb 2005 Author: Jianhua Mo, Sandra Hardy
- Adult fuller's rose weevils are wingless, grey-brown, and about 8 mm long.
- Mature larvae are legless, yellow and about 6 mm long.
- Females produce eggs glued together in yellowish, papery masses of about 20-30 without mating.
- Eggs are laid under fruit calyces, in bark crevices, or in microsprinklers under the tree.
- After hatching, the larvae drop to into soil and feed on citrus roots.
- Adults then emerge from the soil mostly between February and May. They climb trees via trunks, weeds and low-hanging foliage.
- The adults chew leaf margins, leaving a serrated edge.
- Foliage near the trunk or touching the ground is most likely to be damaged.
- There are 1-2 generations per year.
- Adults can be found all year, but peak levels are from February to May.
- The presence of eggs under the calyx may cause a problem in some export markets.
- Fuller's rose weevil is a quarantine pest in South Korea. Orchards exporting to South Korea must have low levels of this pest and acceptable management practices in place.
- Fuller's rose weevil attacks all citrus varieties.
- Fortnightly monitoring is necessary from early August to late October, and again from February to late June.
- Trees selected for monitoring must be randomly scattered throughout the block.
- Examine low-hanging fruits near the trunk, looking for egg masses under the calyx.
- Examine low-hanging foliage for signs of feeding damage.
- The abundance of adult weevils can be monitored by beating tree limbs.
- Wasp Fidiobia citri
- Assassin bug
- Praying mantises
- Parasitic nematodes (such as Heterorhabditis sp.)
- Control of Fuller's rose weevil is required especially for exporting crops.
- Appropriate actions include pruning the skirts of trees at the end of each season, controlling weeds, and applying sticky bands around the tree trunk.