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UV, polycarbonate sheeting and pollination

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Fruit Ninja starts with ...
I'm looking to install some polycarbonate sheeting or similar over the top of our fruit trees to protect against the extreme heat of the summer, but I am concerned that if use sheeting that blocks UV then I won't get pollination from bees and will drastically reduce my fruit production.

I don't want to have something that I need to remove over the winter-spring as that will be too difficult. Plus I'm also hoping to reduce the 'reaching for the sky' that gets away from me and leaves the branches tangled in the top of our mesh bird proof cage.

Does anyone know whether the 99% UV reduction of products will be an issue and if so - are there any alternative products that let in the UV?
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Fruit Ninja
Horsham
8th October 2019 2:12pm
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David01 says...
Hi Fruit Ninja,

polycarbonate sheeting will increase the heat of your fruit tree as the air trap inside will be increased more than 10C to 15C. If you want to protect the extreme heat of the summer use the shade cloth 30%, 50% or 70% etc instead. Cheers.
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David01
CRAIGIEBURN,3064,VIC
10th October 2019 4:04pm
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Original Post was last edited: 11th October 2019 8:44am
jakfruit etiquette says...
I have both shadecloth hoophouses and plastic covered hoophouses and other flat roof shadehouses, but rarely get bees inside either, its probably the physical barrier, ie they cant find the open front door. Your problem could be UV, but also a design, physical barrier problem.
Maybe open sides might be better, but wind underneath could flip the roof. You could plant other bee attractants beside your roof to lure bees under. Have you considered getting a honey bee hive under your roof, or another bee type, ie native bees, or non bee pollinators ? I would look at Hydroponic/protected horticulture websites.
Please keep us updated.
UV transmitting greenhouse plastic, there are others also I think
https://www.agcchem.com/products/specialty-materials/f-clean-greenhouse-film/
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jakfruit etiquette
vic
10th October 2019 8:15pm
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Fruit Ninja says...
My biggest problem is that the trees keep growing through the wire we have at the top. I can't keep on top of them. Was hoping that shadecloth would have the joint benefits of reducing the branches and the sun.
But the shadecloth then disintegrates and droops.
Ultimately I need a top that I can attach under the cage wire that will prevent the branches from growing through and getting stuck.
There is plenty of light from the sides.
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Fruit Ninja
Horsham
11th October 2019 5:36pm
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Original Post was last edited: 11th October 2019 5:39pm
jakfruit etiquette says...
Many trees are under shade canopies, the roof is usually much higher than the trees. This allows for ladders to be used, tractors to drive thru, etc. I can only think you need to raise the structure or re work the trees so they grow from lower points, and you can prune down each season.
Or place the shade above the bird wire on another structure. Red shade cloth is used to reduce vertical growth, blue shadecloth will increase it. Green or Black shadecloth might be causing plants to climb for light.
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jakfruit etiquette
vic
13th October 2019 1:15pm
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