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Alvine starts with ... Wondering if someone can solve my problem. I sprayed my Red Globe vine with wettable Sulphur before budburst, then Phos Acid since fruiting. Yet the bunches are starting to display brown blotches like on the attached pic, that eventually take over the fruit. The affected area of the fruit shrinks inwards, like the moisture is being drawn out of it until all that's left is a shriveled up "mummy". There is no sign of fungal presence on the leaves or the shoots, which makes me think more of some deficiency. The soil here is nothing but sand and I've been using a basic fruit fertilizer. Maybe not enough?
| About the Author Alvine Yanchep 26th November 2013 2:45pm #UserID: 8385 Posts: 6 View All Alvine's Edible Fruit Trees |
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Original Post was last edited: 26th November 2013 2:44pm | |||||||
| About the Author yrt sydney 26th November 2013 4:32pm #UserID: 8343 Posts: 86 View All yrt's Edible Fruit Trees |
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Alvine says... Thanks for your thoughts yrt. I'm not sure it's Botrytis though. All the info I find about Botrytis eventually shows a "mildewy" growth on the fruit and true "bunch rot" formation, whereas this starts on the outside of the affected fruits and seems quite random in occurence. Hence my suspicion of some mineral deficiency, perhaps, maybe... | About the Author Alvine Yanchep 26th November 2013 5:58pm #UserID: 8385 Posts: 6 View All Alvine's Edible Fruit Trees |
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| About the Author jakfruit etiquette vic 26th November 2013 9:02pm #UserID: 5133 Posts: 915 View All jakfruit etiquette's Edible Fruit Trees |
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| About the Author Diana Brisbane 26th November 2013 10:36pm #UserID: 3004 Posts: 284 View All Diana's Edible Fruit Trees |
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Alvine says... Thanks Jackfruit & Diana. No relationship with sun exposure and not consistent with Phos acid spraying. Last year, when it seemed the vine might actually be ready to produce for the first time after about 12 years of total neglect, I fertilized it after a few bunches had formed. It then put out quite a few more. I never treated it and all the "secondary" bunches got affected with these blotches and dropped, while the handfull of original ones got to maturity. By the end, the leaves were showing signs of powdery Mildew. So this year, I really looked after it. Bear in mind, this is Perth: very dry and probably the poorest soil anywhere in Australia. | About the Author Alvine Yanchep 26th November 2013 10:54pm #UserID: 8385 Posts: 6 View All Alvine's Edible Fruit Trees |
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| About the Author Mike Tr Cairns 26th November 2013 11:10pm #UserID: 8322 Posts: 614 View All Mike Tr's Edible Fruit Trees |
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| About the Author Alvine Yanchep 27th November 2013 10:45am #UserID: 8385 Posts: 6 View All Alvine's Edible Fruit Trees |
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| About the Author Alvine Yanchep 4th December 2013 11:15am #UserID: 8385 Posts: 6 View All Alvine's Edible Fruit Trees |
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| About the Author amanda19 Leschenault (150km south of Perth) 4th December 2013 5:57pm #UserID: 2309 Posts: 4607 View All amanda19's Edible Fruit Trees |
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Alvine says... Hi Amanda, Definitely not sunburn. Boron? I guess it could be though the fertilizer I had been using did contain trace elements. Perhaps not enough in view of the sandy soil. Looking hard, I did find leaves with the border starting to die and some with yellowing between the veins. But like I said, I had to look hard. I imagine the problem with deficiencies, is that they combine, making it hard to diagnose accurately. But it looks like I'm on top of it! Thanks again. | About the Author Alvine Yanchep 6th December 2013 4:13pm #UserID: 8385 Posts: 6 View All Alvine's Edible Fruit Trees |
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