Tr&#;dg&#;rds&#;gare avg&#;rande i kampen mot invasiva v&#;xter
J&#;ttebalsamin &#;r en invasiv art som f&#; k&#;nner till. &#; Foto: Anna-Karin Fallheden
Publicerad
Invasiva fr&#;mmande arter har oftast ett ursprung som tr&#;dg&#;rdsv&#;xter. Men b&#;de tr&#;dg&#;rds&#;garnas och allm&#;nhetens kunskaper &#;r ofta begr&#;nsade, konstaterar forskare vid Sveriges lantbruksuniversitet.
I enstudie vid Institutionen för landskapsarkitektur, planering och förvaltning på SLU har Cecilia Palmér och hennes kollegor undersökt hur väl trädgårdsägare känner till invasiva arter och förstår de begrepp som används. De ser att trädgårdsägarna är en enskilt viktig grupp att nå och informera för att möjliggöra en begränsning av invasiva arter. Med rätt kunskap och ökad information kan trädgårdsägare göra skillnad i kampen mot invasiva arter.
Ta del av hela artikeln från Extrakt här
Hedge Apples: Pest Control Myth
"Hedge apple" trees (also called Osage orange, Maclura pomifera) are not related to apples or oranges, and their fruit is inedible. The large, grapefruit-sized, brain-like green fruit are better known than the trees and show up in the fall of the year in stores and farmers' markets where they are sold for their purported ability to repel insects.
The hedge apple tree has a long and storied history and is native to Texas, Oklahoma, and Arkansas region. The wood of these trees was prized by Native Americans. Hedge apple trees were used by early settlers as a living fence and were spread across the prairie and planted in hedges in the mids. This greatly expanded the distribution of hedge apple and is the reason they are still commonly found in wooded field borders.
The use of hedge apples for insect control is one of the most enduring pest management home remedies. Claims abound that hedge apples around the foundation or inside the basement will repel boxelder bugs, crickets, spiders, and other pests. Research conducted at Iowa State University has demonstrated that chemicals extracted from the
Species Specifics: Osage Orange
WHAT TO LOOK FOR
Osage orange (Maclura pomifera), also known as bois d’arc or hedge, is a small- to medium-size tree in the mulberry family with furrowed bark and thorny branches that reach 36 to 65 feet tall. The trunk is short and often divides into several limbs with upward arching branches. Leaves are deciduous and cluster at the end of short spurs, and range from 2 to 5 inches long and 1 to inches wide. The tree produces fruit in September; the yellow-green fruit are approximately 3 to 5 inches in diameter.
WHERE IT IS FOUND
Osage orange is mainly found in the Great Plains and northern United States and tends to grow on pasture and range land that is overgrazed. It may become invasive in some habitats and can displace desirable vegetation if not properly managed.
Osage orange was commonly used as a windbreak or “living fence” in prairie states. It was used heavily in the early s to prevent soil erosion and to deter cattle from roaming, which has contributed to it becoming a more invasive plant in recent decades.
HOW TO TREAT IT
Controlling Osage orange is crucial for the productivity of pastures and rangeland. If left alone, its
arter kan vara invasiva i Sverige – fler åtgärder behövs
Invasiva arter är ett växande problem i Sverige och stärkta åtgärder behövs. WWF välkomnar att SLU Artdatabanken gjort en ny omfattande riskklassificering av främmande arter. Men nu är det hög tid för politiker och myndigheter att ta arbetet vidare, menar WWF.
– WWF är positiva till att riskklassificeringen har utökats betydligt. Den här utredningen är ett viktigt led för att bättre rusta landet för kampen mot invasiva arter. Nu är det viktigt att dessa arter förs upp på den nationella förteckningen så att bekämpningsåtgärder kan sättas in för de arter med högst risk, säger Anna Sandström, miljöjurist på Världsnaturfonden WWF.
Utredningen är gjord av SLU Artdatabanken på uppdrag av Naturvårdsverket och Havs- och vattenmyndigheten. arter har utredds och av dessa är arter i de två högsta riskklasserna. Det är betydligt fler än under den tidigare utredningen från där arter hamnade i de högsta riskklasserna.
– Det här stärker bilden av att flera trädgårdsväxter är ett stort problem. Bland de arter som hamnade i kategorin mycket hög risk så var ett stort antal just trädgårdsväxter. Vi uppmanar trädgårdsbranschen att ta ett
Since Osage Orange trees are very common in the United States, you might wonder, ‘Is Osage Orange Invasive?’. In this article, we will explore both sides of the argument and examine the factors that affect the tree’s invasiveness.
You should know that this specimen is particularly considered a non-concerning species, even though they are invasive. These trees are widely used as a hedge or fences, and you can also use their fruit to repel insects. However, let’s first understand: is Osage Orange Invasive?
Is Osage Orange Invasive?
Yes, Osage orange is invasive. A study by the United States Department of Agriculture found that Osage Orange is invasive, invaded areas outside its natural range, including forests, fields, and roadsides, and was growing in dense stands. The study also noted that Osage Orange produced seeds dispersed by birds and other wildlife, further increasing its spread.
Many experts argue that Osage Orange is invasive because it has been introduced to areas outside its natural range. Plus, this specimen can also reproduce & spread rapidly. You should note that invasive species are “non-native organisms that cause harm t