Rappelons d’abord que ces deux firmes avec MAUGET constituent le trio de tête des spécialistes américains de l’Endothérapie. Si les barrières au marché français n’étaient pas si importantes, ils y viendraient volontiers ( quoi que le nouveau prix Syngenta devrait théoriquement calmer leurs ardeurs). SNP connait et échange déjà avec Arborsystem. Que peut-on relever dans ces deux papiers ?
- qu’ils forment leurs spécialistes en trois jours - qu’ils ont un taux d’efficacité de 90 % - que leurs travaux sont suivis par l’université de UC Riverside - que leur fourchette de prix et 120 - 200 $ (SNP l’a déjà noté) - qui sont bien conscients que cette formule insecticide à des limites et qu’ils investissent massivement dans des recherches bio sur le territoire d’origine du prédateur. CQFD 1/ ARBORSYSTEM
ArborSystems at EAB Tree School !
Posted on November 29, 2016 by ArborSystems
Here is Chip Doolittle, president of ArborSystems, explaining trunk injection and then demonstrating Wedgle Direct-Injection Tree Treatment System at the EAB Tree School (photo credit – John Fech, UNL). Nebraska Arborist Association conducted a three-day class for certified arborists and tree care professionals at the Seymour Smith Park in Omaha. It was the first class of its type offered by the association covering the anatomy of wood, tree injection types and procedures and dissecting injected trees. We were glad to be part of the education process and pleased to easily demonstrate our product in the field as we don’t need power and can treat almost any tree in five minutes or less.
Dawn Fluharty, pest control advisor for Arborjet, demonstrates how using an IV type unit to inject pesticides into a trunk of a sycamore tree to treat a beetle called “Polyphagous shot hole borer” (PSHB) that is currently threatening California’s trees, at the Sheraton Fairplex Hotel in Pomona, CA., Tuesday, November 29, 2016. The Pomona Fairplex is one of three protection trial sites initiated by Arborjet, were trees are treated with three systematic trunk injection treatments, including TREE-age insecticide, and Propizol. (Photo by James Carbone for the San Gabriel Valley Tribune)
POMONA >> Don Grosman hooks tiny needles into the bark of a 50-foot-tall sycamore tree, injecting the tree with a medicinal cocktail to ward off Fusarium Dieback, a plague killing urban street and park trees.
“We equate it to giving someone a shot for the prevention of a disease,” said Grosman, technology advancement manager and entomologist with Arborjet, Inc., a Massachusetts company that patented the combination of pesticide and fungicide that’s directly shot into a tree’s vascular system like a shot is injected into a person’s bloodstream to prevent measles or the flu.
Grosman returned Tuesday to the Pomona Fairplex grounds to complete a three-year trial started in January 2014 in cooperation with researchers at UC Riverside. So far, results are promising, he said :
Ninety percent of trees that received an injection of a combination of two chemicals, Propizol (propiconazole), a systemic fungicide ; and TREE-age (emamectin benzoate), a general use pesticide ; showed no signs of the disease, he said.
Similar results occurred in Pasadena Glen, a leafy neighborhood north of Kinneloa Mesa that asked Arborjet for help with about 100 private sycamore trees in October 2013. After three years, the neighborhood lost one of 20 treated trees, yet 40 percent of the untreated trees set up as a control died from the disease, Grosman said.
“We are putting a product in to prevent the disease from getting a foothold,” he said.
The company sells its products to 12 distributors in California, who sell to numerous cities, institutions and private arborists, said Dawn Fluharty, regional technical manager based in the Bay Area. Aside from inoculating sycamores at the Fairplex, the company has participated in trials in the Rose Bowl parking lot and the California Institute of Technology, both in Pasadena. It is now working in Craig Park and Carbon Canyon Park in Orange County to prevent the death of park trees, Grosman said. Disney and the city of Newport Beach attended Tuesday’s demonstration. Lake Arrowhead and the city of Santa Ana have asked for more information, Fluharty said.
The injection of the double-dose cocktail only works to prevent the spread of fusarium dieback disease and mostly in about 130 species that are ornamental, such as sycamores, liquid ambers, box elders, willows, maples and avocado trees. Grosman said. Stopping the fungal infection is specific to these trees because they are hosts of the polyphagous shot hole borer, euwallacea, an invasive, tiny beetle about 0.05 to O.1 inches in length that tunnels into trees and creates fusarium euwallacea, a fungus that blocks the flow of water and nutrients in the tree, leading to canopy die-off or death by starvation. This pest, believed to have been imported from Vietnam, is different than the pine shot borer that is killing millions of trees in the national forests in the state.
Arborjet’s combo is not a remedy for that problem, experts say. Also, Arborjet’s trunk injection system is too expensive to apply to millions of forest trees. Each injection is about $120 to $200 per mature tree with at least a 10-inch diameter, Grosman said.
“This is no silver bullet kind of control” because it is only applicable to landscape trees, said Akif Eskalen, a professor of plant pathology at UC Riverside familiar with Arborjet’s trials and products. “The problem is bigger than the landscape level. It is also in the native forests.”
The pest and the disease first surfaced in Los Angeles County at Whittier Narrows in 2003 and is now established in Los Angeles, Orange, San Bernardino and Ventura counties. The disease at first affected a small number of ornamental trees. In 2010, it was most likely the cause of death of a large number of box elder street trees in Long Beach. Grosman said it attacks trees with plenty of water, saying the drought — hurting native and ornamental trees — may not be in play in this case.
Eskalen praised the work of Arborjet, saying the direct trunk injection of a small amount of pesticides/fungicides is better than spraying the mixture, which can drift into other plants and birds and in the air. Also, the drench method of dousing the base of a sycamore tree with the solution can contaminate the ground water.
The best solution is to find a natural predator for the polyphagous shot hole borer, something he’s working on. Eskalen travels to Vietnam and other Southeast Asian countries trying to find a predator to the shot hole borer.
“We need to look at the bigger picture to find more environmentally friendly bio controls such as a natural predator,” Eskalen said.