Rubber Vine Survey and Control and Other

Rubber vine (Cryptostegia grandiflora)

Rubber vine is spreading on land beyond the containment line within CYP and our program is designed to survey and control infestations north and south of this line. An initial aerial survey of the area from the Kendal River Catchment right across the Cape including the Lakefield National Park access road up to the Port Stewart access road was conducted. This survey has given the group the ability to target strategic infestations north of the containment line. Crews in partnership with landholders have undertaken control works on strategic outcrops of rubber vine north of the containment line.

Hymenachne

(Hymenachne amplexicaulis) Hymenachne has a limited distribution within CYP, located mostly within the Cook Shire with an isolated outbreak found within the NPA. CYWAFAP have been controlling this weed in conjunction with Far North Queensland Regional Organisation of Councils and the funding has been provided through the Defeating the Weed Menace Program. There are several issues in the control of this weed within the region, mostly related to safety due to estuarine crocodiles being present in the waterways. Control methods used included hand pulling and chemical applications from small vessels and an Argo all-terrain vehicle.

Ophiomyia camarae

Ophiomyia camarae is a herringbone leaf-mining fly that contributes to reducing the spread of lantana. The fly favours lantana growing in sheltered areas where humidity levels are high. Damaged Lantana plants can become defoliated, causing plants to become stunted and produce fewer flowers and seeds. Over the past 6 years CYWAFAP have worked with the Tropical Weeds Research team in Charters Towers on releasing and monitoring the bio control at several different sites around cooktown.

Parkinsonia survey and control

(Parkinsonia aculeata) Parkinsonia on Cape York Peninsula is currently confined to the west coast. The infestations are relatively small and contained, but the potential exists for Parkinsonia to spread throughout the entire marine plains area on the west coast of Cape York. Historically, work has been undertaken on the Pormpuraaw floodplains treating mature seed bearing trees. Follow-up treatment on seedlings is undertaken by the rangers group at Pormpuraaw to ensure that these areas are not allowed to develop mature trees, treatment is again being undertaken to remove new seedlings. This year Parkinsonia has been controlled on the last large scale infestation on Aurukun south lands. A survey undertaken using both aerial and ground survey methods and mapping was carried out using moving map technology through PDA’s. Once surveyed and mapped, training and control work was undertaken.