Navigation Links
Insect release proposed to control exotic strawberry guava

U.S. Forest Service scientists with the Institute of Pacific Islands Forestry have submitted a proposal to release a Brazilian insect to control the spread of strawberry guava, a South American tree that has invaded and degraded native Hawaian ecosystems since it was introduced in 1825 as a garden plant.

The scientists are working in collaboration with the Hawai Department of Land and Natural Resources, and Hawai Department of Agriculture, agencies responsible for issuing permits authorizing release of the insect on Hawaian Islands. Initial release of the insect is proposed for this summer in the Olaa Forest Reserve on the Big Island.

Land managers are particularly concerned about the plant because it has potential to invade nearly half the states land area, forming dense thickets that crowd endangered native species and impede access to residential property. Past control methods have been limited to removal by hand, herbicides and bulldozers.

Strawberry guava also affects Hawaian cultural practitioners who can no longer collect native plants once found in abundance in forests. In addition, it hosts non-native fruit flies that have cost the state billions of dollars in lost agricultural revenue.

Institute of Pacific Islands Forestry scientists were tasked with finding a biocontrol agent for strawberry guava to protect remaining native ecosystems, improve control of fruit flies and reduce dependence on chemical herbicides. Biocontrol agents in Hawai have been used for more than a century, including for control of prickly pear cactus, lantana, banana poka and ivy gourd.

Non-native plants became invasive in Hawai because they escaped the animals, insects and diseases that naturally kept them in check so the scientists traveled to Brazil where insects evolved to prey specifically on the tree.

Field research yielded the insect Tectococcus ovatus, or the Brazilian scale, which hatches nymphs that settle on strawberry guava leaves, inducing the plant to build a bubble-like gall to enclose it. The plants vigor is reduced and it stops producing fruit, decreasing its spread over a period of years. The insect does not kill the plant outright.

Observations in Brazil that began in 1993 and testing at the Hawai Volcanoes National Park Quarantine Facility the past six years have shown the insect is highly host-specific and will only attack strawberry guava, not common guava or other members of the plants family in Hawai.


Contact: Roland Giller
US Forest Service, Pacific Southwest Research Station

Related biology news :

1. Oregano oil works as well as synthetic insecticides to tackle common beetle pest
2. Insects use plant like a telephone
3. Insects evolved radically different strategy to smell
4. Insects take a bigger bite out of plants in a higher CO2 world
5. Insecticide combo delivers knockout punch
6. Birds, bats and insects hold secrets for aerospace engineers
7. Ants and avalanches: Insects on coffee plants follow widespread natural tendency
8. Insects giant leap reconstructed by founder of sociobiology
9. Insect gut detects unhealthy meal
10. Tiny pest-eating insect fights fruit flies
11. ESA celebrates 100 years of insect science journals
Post Your Comments:
(Date:11/2/2015)... Calif. , Nov. 2, 2015  SRI International ... million to provide preclinical development services to the National ... contract, SRI will provide scientific expertise, modern testing and ... variety of preclinical pharmacology and toxicology studies to evaluate ... --> The PREVENT Cancer Drug Development Program ...
(Date:10/29/2015)... , Oct. 29, 2015  The J. Craig Venter ... titled, "DNA Synthesis and Biosecurity: Lessons Learned and Options ... of Health and Human Services guidance for synthetic biology ... --> --> ... has the potential to pose unique biosecurity threats. It ...
(Date:10/29/2015)... 2015  Rubicon Genomics, Inc., today announced an ... its DNA library preparation products, including the ThruPLEX ... Plasma-seq kit. ThruPLEX Plasma-seq has been optimized for ... libraries for liquid biopsies--the analysis of cell-free circulating ... in cancer and other conditions. Eurofins Scientific is ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... ... November 24, 2015 , ... This fall, global software solutions leader SAP and ... to develop and pitch their BIG ideas to improve health and wellness in their ... votes to win the title of SAP's Teen Innovator, an all-expenses paid trip to ...
(Date:11/24/2015)... New York , November 24, 2015 ... to a recent market research report released by Transparency ... projected to expand at a CAGR of 17.5% during ... "Non-invasive Prenatal Testing Market - Global Industry Analysis, Size, ... estimates the global non-invasive prenatal testing market to reach ...
(Date:11/24/2015)...  Twist Bioscience, a company focused on synthetic ... Bioscience chief executive officer, will present at the ... 2015 at 3:10 p.m. Eastern Time at The Lotte New ... --> --> About Twist ... on Twitter. Sign up to follow our Twitter ...
(Date:11/24/2015)... Vancouver, BC (PRWEB) , ... November 24, 2015 ... ... to our customer, OrthoAccel® Technologies, Inc., on being named to Deloitte's 2015 Technology ... Creation Technologies’ Texas facility, OrthoAccel manufactures AcceleDent®, a FDA-cleared, Class II medical device ...
Breaking Biology Technology: