By Japan News-Yomiuri
Cherry and peach trees across Japan are dying at the hands of invasive beetles, and one expert warns that in the worst-case scenario, there may be no cherry blossoms to view a few decades from now.
The first report of damage by the kubiakatsuya kamikiri (red-necked longhorn beetle) came in 2012 in Aichi Prefecture. Now, 11 prefectures have been hit, with cherry trees dying in parks and schools, as well as peach trees in orchards.
The beetle, native to China and Mongolia, was designated an invasive species in 2018. It may have arrived in Japan in wooden packing materials.
“No matter how many times we get rid of them, they just keep coming back,” said the office manager at Tatebayashi High School in Tatebayashi, Gunma Prefecture, while pointing out a tree that suffered holes in its trunk.
There were once 29 cherry trees fronting the school gate. They were popular among students and residents.
In July 2015, the trees started to die at the hands of the beetle. The school tried to fight off the bug with pesticide and covered tree trunks with protective nets. But swarms of beetles kept returning. By August, the staff was battling the bugs hands on and killed 350.
But since then, seven trees have been chopped down, and six stand dead. The remaining 16 are blooming poorly, and because large branches can suddenly fall off trunks, the school has given up. By the end of next year, all the trees will be gone.
The beetle’s high fertility and mobility make it especially threatening. While a Japanese long-horned beetle lays 100 eggs at most, the red-necked longhorn can lay more than 500 eggs and travel more than a mile by riding the wind.
With no natural enemies, its population abounds, and the fact that it prefers peach and cherry trees only exacerbates the problem. So far, there is no definitive method for eradicating the bug.
In Tatebayashi, the government is paying residents about 50 cents per beetle killed. Last year, citizens killed 6,249 beetles. Yet the number of damaged trees grew.
“If we don’t act now, we may not be able to enjoy cherry blossom viewing 20 to 30 years from now,” said Ryutaro Iwata, a specialist in forest entomology. “The central government must establish a system to forcibly cut down, crush and burn the damaged trees.”
By Adrian Higgins
A pear seedling selection named Bradford was cloned by the gazillion to become the ubiquitous street tree of America’s postwar suburban expansion. Then it turned invasive.
Carole Bergmann pulls her small parks department SUV into an aging 1980s subdivision in Germantown, Md., and takes me to the edge of an expansive meadow. A dense screen of charcoal-gray trees stands between the open ground and the backyards of several houses. The trees are callery pears, the escaped offspring of landscape specimens and street trees from the neighborhood. With no gardener to guide them, the spindly wildlings form an impenetrable thicket of dark twigs with three-inch thorns.
Bergmann, a field botanist for the Montgomery County Parks Department, extricates herself from the thicket and in the meadow shows me that what I take to be blades of grass are actually shoots of trees, mowed to a few inches high. There are countless thousands, hiding in plain sight in Great Seneca Stream Valley Park. If it were not cut back once a year, the meadow would become like the adjacent screen, wall upon wall, acre upon acre of black-limbed, armored trees worthy of Sleeping Beauty’s castle.
“You can’t mow this once and walk away,” said Bergmann, who began her 25-year career in the department as a forest ecologist but has been consumed by an ever-pressing need to address the escape of the Bradford pear and other variants of callery pear, a species that originated in China, along with other invasive exotics.
Contact Hakan Ekstrom, Wood Resources International LLC
China imported record-high volumes of softwood lumber in 2016 and softwood log imports reached their second highest level on record. Despite relatively pessimistic forecasts for wood demand early in 2016, China’s need for imported wood picked up during the summer and fall with import volumes of both logs and lumber being up about 20% in the 4Q/16 as compared to the 4Q/15. Total importation of logs and lumber (in roundwood equivalents) reached almost 76 million m3 in 2016, which was up 17% from 2015, and almost 38% higher than five years ago, according to the Wood Resource Quarterly (WRQ).
Over the past decade, the importation of softwood lumber has grown much faster than that of softwood logs. From 2006 to 2016, lumber imports were up from just over two million m3 to over 21 million m3, while log import volumes were up from 20 million m3 to 34 million m3 during the same period.
From 2015 to 2016, Russia has increased its shipments of lumber to China by over three million to a total of 11.6 million m3 (this includes logs that have been canted to avoid log export taxes). With lumber markets in the Middle East and Northern Africa (the MENA countries) and Europe having been relatively weak the past few years, many sawmills in the Nordic countries have increased their presence in the Chinese market with shipments being up over 35% in 2016 from the previous year. Although lumber supply from Finland and Sweden still account for only six percent of the total lumber imports, the share can be expected to increase in the coming years because of more intense marketing of predominantly higher-quality spruce lumber for the Chinese furniture, millwork and construction industries.
CHINA will bring its forestry output to 9 trillion yuan (US$1.3 trillion) by 2020, an official has said. Nearly 60 million people are expected to be employed in forestry, Zhang Jianlong, director of the State Forestry Administration, said at a conference.
Nearly 60 million people are expected to be employed in forestry, Zhang Jianlong, director of the State Forestry Administration, said at a conference.
Development of forestry can raise the income of a large workforce, he said.
Around 60 percent of the country’s poor population live in mountains, forests and desert regions, which are key areas for tree planting.
China has become the world’s biggest producer, trader and consumer of forest products. Output grew from 409 billion yuan in 2001 to 5.9 trillion yuan in 2015, a 13.5-fold increase in 15 years.