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Posts Tagged: exotic pest

Invasive melon fly trapped in Fresno County

Melon fly (CDFA image.)
CDFA officials have trapped a single male melon fly in a Fresno vineyard, sending shivers down the spines of local farmers who produce its target crops, including cucumber, eggplant, squash and tomatoes, according to a report on the CBS Channel 47 news.

The melon fly is native to Asia, but has spread to other parts of the world, including Africa and the Pacific Islands. Melon flies were first found in California in 1956 and have been captured sporadically over the years, but all infestations have been successfully eradicated. Just last year, eight melon flies were found in Kern County. Trapping last month determined that the Kern County population was eradicated, the story said.

Reporter Tony Botti spoke to UC Cooperative Extension farm advisor Richard Molinar about the potential economic damage of a melon fly infestation to small-scale farms. If the pest is found in greater numbers, CDFA will likely impose a quarantine, which stops farmers from moving any of their products out of the area.

"If they are not able to sell, they are going under," Molinar said. "They’ll take a loss this year and many won't be able to survive a loss."

UCCE farm advisor Richard Molinar speaks about melon fly on the CBS Channel 47 news.
UCCE farm advisor Richard Molinar speaks about melon fly on the CBS Channel 47 news.

Posted on Monday, June 27, 2011 at 9:23 AM

Another palm tree infested with red palm weevil

Officials have confirmed that the red palm weevil is not confined to a single palm tree in Laguna Beach, according to a story in the Daily Pilot. Just blocks from the first infested tree, another Canary Islands date palm is being killed by red palm weevil.

UC Riverside Cooperative Extension entomologist Mark Hoddle said the crown of the second infested palm has dropped off, and the top of the trunk is ringed with a 'halo' of palm fronds.

"The trunk of the palm has been heavily damaged internally by feeding red palm weevils. The central portion of the trunk now contains a highly fermented and very wet 'mash' of plant material," the story quoted Hoddle.

The dying tree contained portions of at least nine dead adult weevils, one live adult and seven empty pupal cases.

It is now likely that additional palms in North Laguna are infested with this destructive pest, the story said.

CDFA, the Orange County Ag Commissioner, USDA and UC Cooperative Extension are hosting the first of several informational meetings from 10 a.m. to 12 noon Friday, Nov. 5, in the Laguna Beach City Council Chambers, 505 Forest Ave. At the meeting, experts will inform local government officials, arborists, public works officials, landscapers and pest control advisers about the current red palm weevil situation and how to identify the pest and its feeding damage.

Future meetings will target other industry members and the public.

Details about the meeting and more information are on the UC Riverside Center for Invasive Species Research blog.

Southern California Public Radio's Madeline Brand interviewed Hoddle about red palm weevil for a story broadcast last Friday.

Red palm weevil larva emerges from its cocoon.
Red palm weevil larva emerges from its cocoon.

Posted on Monday, November 1, 2010 at 10:00 AM

Red palm weevil found in Orange County

Palm tree growers, government officials and UC scientists are moving quickly to prevent the spread of red palm weevil, which made its first U.S. appearance a month ago in Laguna Beach, according to an article in the Riverside Press-Enterprise. The pest has caused enormous damage to palm trees in other parts of the world. Its larvae excavate large holes in the trunks of many types of palms - including coconut, date and oil palms, canary, queen and fan palms - killing a mature tree in about a year.

"This is central to our livelihood," the story quoted Albert Keck, chair of the California Date Commission and a third-generation date farmer.

Press-Enterprise reporter Mark Muckenfuss noted in the story that concern about the palm tree pest goes well beyond farmers' pocketbooks. Palm trees add a distinctive character to local landscapes.

"Palms are iconic to California," Keck was quoted.

Originally from Southeast Asia, the red palm weevil has spread to Africa and Europe, reaching the Mediterranean in the 1980s. It was first recorded in Spain in 1994.

UC Riverside entomologist Mark Hoddle said the weevil was probably brought into the United States as eggs, larvae or pupae hidden inside imported palms.

"These can travel great distances because they live with their food supply," Hoddle said.

A UC Riverside news release said scientists, growers and regulators will gather at 2 p.m., Friday, Oct. 29, at UC Riverside to discuss a collaborative effort to manage red palm weevil and a campaign to alert and educate Southern California homeowners about the threat.

Detailed information about red palm weevil is on the UC Center for Invasive Species Research website.

Red palm weevils are quite large and have a slender snout.
Red palm weevils are quite large and have a slender snout.

Posted on Thursday, October 28, 2010 at 6:38 AM

Melon fruit fly found in Kern County

Farmers and ag officials will gather at the UC Cooperative Extension office in Kern County at 6 p.m. Wednesday to discuss the recent discovery of five melon fruit flies southeast of Bakersfield, according to an article in Western Farm Press.

A native of Asia, melon fruit flies' only U.S. home currently is in Hawaii. However, CDFA says it poses a significant threat to a wide variety of agricultural crops important to California, including peaches, oranges, beans, tomatoes and most crops in the cucumber family.

To eradicate the flies already in Kern County, the agricultural commissioner's office and CDFA are using a "male attractant" for trapping within a 4.5-mile quarantine area and have increased trapping densities to 1,000 traps per square mile within a nine-mile grid, said the Western Farm Press article.

In a news release, the Kern County Agriculture Department implored residents to help prevent the introduction of exotic insects and diseases.

"When returning from a trip out of state, please do not bring back prohibited vegetables, fruits, or other plants, because there could be an insect pest or a plant disease hitching a ride with you," the release quoted ag commissioner Ruben Arroyo. "Foreign insects and plant diseases can kill or significantly harm native species, destroy landscaping, commercial and homegrown fruits and vegetables, increase the use of pesticides, and add extra costs to California’s agriculture industry - costs that will get passed along to you the consumer."

Melon fruit fly is about the size of a house fly.
Melon fruit fly is about the size of a house fly.

Posted on Monday, August 16, 2010 at 9:44 AM

European grapevine moth funding for growers

At a press conference in Fresno Wednesday, the Natural Resources Conservation Service announced a $1 million cost sharing program to help combat European grapevine moth in California.

The support will cover half the cost of voluntary, environmentally friendly control options, according to the NRCS press release. The pest control strategies, the release said, were developed and approved for use over the past five years by NRCS and the University of California Cooperative Extension. The cost of the treatment is about $208 per acre; NRCS will provide $104 per acre.

"Our intention is to complement the efforts of our partners at CDFA and USDA APHIS who have both the expertise and authority for overseeing infestations of EGVM," NRCS state conservationist Ed Burton is quoted in the release. "We will provide some very targeted Integrated Pest Management tools to farmers who are growing grapes in close vicinity to trapped moths."

Farmers must apply for the funding by June 23.

The Fresno press conference was covered by a number of media outlets, including:

The press conference came a day after USDA Animal and Plant Health Inspection Service announced it released an additional $1.75 million in Farm Bill funding to stem the spread of European grapevine moth in California.

Posted on Thursday, June 10, 2010 at 8:27 AM

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