Aloha! Read below to find out what OISC has been up to this month.
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(Photo Above) Can you see it? OISC's Americorps Intern Nada McClellan pointing out miconia hiding amongst the trees. You'd think something with big purple leaves would be easier to see! 

April 2016 Report 

  • The crew found three mature miconia trees this month. One was in Kaʿalaea, one in Kahuluʿu and one in Makiki. The crew removed another 843 immature trees from 11 different watersheds. In total the field crew surveyed 232 acres by ground and 2,355 acres by air.
  • OISC and DLNR/DOFAW Survey Forester flew the middle  Koʿolau Range to conduct early detection for signs of Rapid ʿŌhiʿa Death. Points were taken for suspect patches of dead trees. OISC will coordinate with research team on Big Island and partner agencies in order to take samples and confirm whether the disease is present. OISC has been responding to reports of dead ʿōhiʿa
    trees and sending samples to the lab in Hilo as have other conservation organizations. There have so far been no detections on Oʿahu. Learn more about Rapid ʿŌhiʿa Death at
  • Regular CRB and Naio thrips early detection surveys found none.
  • OISC and Hawaiʿi Ant Lab surveyed the two streams that run through 52 private properties in Waimanālo. OISC acquired permission for properties that were not owned by the Hawaiʿi Department of Agriculture lessees. No little fire ants were detected.  
  • OISC responded to two reports from the public of stinging ants and tested for little fire ant. The tests were negative.  
  • HECO’s system arborist and certified tree climber assisted a Hawaiʿi Department of Agriculture Operation to treat a little fire ant colony living in the canopy of gunpowder tree in Waimanālo. OISC provided herbicide and helped lay vials at the base of the tree.
  • OISC conducted habitat modification and vegetation maintenance in preparation for an upcoming little fire ant monitoring survey.
  • Early detection nursery surveys found little fire ant. The nursery quarantined the plants and will treat.  
  • The Pest Response Specialist caught five frogs in Waimanālo, including the one that got away last month.  
  • The field crew treated areas infested with devil weed (Chromolaena odorata) at Camp Smith. They also conducted ground and aerial surveys in ʿAiea.
  • The crew conducted regular surveys and treatments for devil weed in the Kahuku Training Area.
  • Crew did a sweep of core area at Poamoho where Tibouchina herbacea is found. The crew surveyed 2 acres, and treated three mature and 63 immature plants.
Above: The area surveyed in about 4 hours using Digital Mobile Sketch Mapping in cooperation with DOFAW's Survey Forester.  The crew surveyed 37,383 acres and took points in areas where we should come back later to sample.  The ʿōhiʿa could have died from drought or another cause. To date, no samples from Oʿahu have tested positive for the fungal pathogen that causes Rapid ʿŌhiʿa Death. 

This type of surveying is much different then when the crew searches for miconia from the air. That type of flying is low and slow and the crew depends on the rotor wash to blow back the canopy, revealing miconia underneath. This was very high and fast and an efficient technique for quickly detecting areas in need of sampling.
  • Outreach staff participated in six events, and visited two schools reaching 488 people. Events included three earth day events at UH, Tamarind Park and the Navy Exchange, Mililani Middle School STEM (Science Technology Engineering and Mathematics) Night and the Mānoa 1,000 Tree Giveaway (and yes, the trees being given away had been Weed Risk Assessed!)
  • OISC’s regular volunteer trip had 12 volunteers that removed 49 Ardisia virens and 52 Stromanthe tonckat from Lyon Arboretum.
Above: OISC volunteers showing Stromanthe and Ardisia whose boss at Lyon Arboretum. Want to volunteer? Visit our website at
Above Left: Miconia has unusually large leaves.
Above Right: Fieldcrew member Kepano Carvalho showing the striking color differences between the top leaf (green) and bottom leaf (purple)
Top: The neverending jungle gym that is hau bush and yes, when this is on your line, you've got to get in touch with your inner monkey and go through. Amazingly, the field crew sometimes finds miconia in this mess. 

Below:  Fieldcrew member Daniel Lum showing Dr. Shady (miconia) whose boss.  
Copyright © 2016 Oahu Invasive Species Committee, All rights reserved.

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