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Any experience with Asimina triloba 'Sweet Virginia' ?


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harrygermany
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PostPosted: Sun Sep 27, 2009 8:57 pm    Post subject: Any experience with Asimina triloba 'Sweet Virginia' ? Reply with quote

Hello all,

has anyone of you any experience with Pawpaw Asimina triloba 'Sweet Virginia' ?

Is it really self-fertile (selfpollinating)?
After how many years (average) does the grafted plant fructify for the first time?
When do the fruits ripen?

Regards

Harry

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Pljoska
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PostPosted: Sat Dec 04, 2010 5:14 am    Post subject: Re: Any experience with Asimina triloba 'Sweet Virginia' ? Reply with quote

The Common pawpaw (Asimina triloba) is a species of pawpaw, native to eastern North America, from southernmost Ontario and New York west to eastern Nebraska, and south to northern Florida and eastern Texas.
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Pljoska
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PostPosted: Sat Dec 04, 2010 5:14 am    Post subject: Re: Any experience with Asimina triloba 'Sweet Virginia' ? Reply with quote

Pawpaw is a large shrub or small tree growing to a height of 11 meters (rarely to 14 m) with a trunk diameter of 20-30 cm.

The leaves are deciduous, spirally arranged, broad lanceolate, 15-30 cm long, with an acute apex and an entire margin.

The flowers are produced in early spring at the same time as or slightly before the new leaves appear, each flower dark red, 2-5 cm diameter, with three sepals and six petals; they have a fetid smell.

The fruit is a large yellow-green berry 5-15 cm long, containing several brown, 15-25 mm diameter seeds embedded in the soft, edible fruit pulp.
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Pljoska
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PostPosted: Sat Dec 04, 2010 5:15 am    Post subject: Re: Any experience with Asimina triloba 'Sweet Virginia' ? Reply with quote

A. triloba is not the first to colonize a disturbed site (arriving roughly four years after a clearcut), but may become dominant and slow the establishment of oaks and hickories. Although shade tolerant, it does not persist in undisturbed old growth forest. It spreads primarily by root suckers; sexual reproduction does occur but at a fairly low rate.[1]

The fruit is eaten by a variety of animals, including raccoons, gray foxes, opossums, squirrels, and black bears.
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PostPosted: Sat Dec 04, 2010 5:15 am    Post subject: Re: Any experience with Asimina triloba 'Sweet Virginia' ? Reply with quote

The fruit is rich in fatty acids, the major one being octanoate. They also contain cis-δ9- and cis-δ11-hexadecenoate, cis-δ9-, cis-δ11- and cis-δ13-octadecenoate.

The seeds have been shown to contain the chemicals asimitrin (an adjacent ring-hydroxylated bis-tetrahydrofuran acetogenin) and 4-hydroxytrilobin (an adjacent bis-THF ring with two flanking hydroxyl groups and an α,β-unsaturated γ-lactone with a 4-hydroxyl group).[2] These chemicals seem to have selective cytotoxicity against prostate adenocarcinoma (PC-3) and colon adenocarcinoma (HT-29) cell lines, thus may become a useful chemotherapeutic chemical for these types of cancer.

The leaves also contain toxic annonaceous acetogenins, making them impalatable to most insects.[3] The one notable exception is the zebra swallowtail butterfly (Eurytides marcellus), whose larvae feed on the leaves. This confers protection from predation throughout the butterfly's life, as trace amounts of acetogenins remain present, making them unpalatable to birds and other predators.

The bark contains other acetogenins, including asimin, asiminacin and asiminecin, which have been shown to be potent inhibitors of mitochondrial NADH:ubiquinone oxidoreductase,[4] making A. triloba a promising source of pesticide and anti-tumour compounds.
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