23 responses
| About the Author Rick SE Queensland 23rd January 2008 10:40am #UserID: 602 |
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Correy says... You can always try the Wild may fruit fly control systems however if you can there is nothing like covering your guavas with a fruit fly proof net when they are about to harvest. That is what I am planning to do. People have left some great comments relating to fruit fly and the guava tree here | About the Author Correy Woolloongabba, QLD 2nd February 2008 2:07pm #UserID: 3 View All Correy's Edible Fruit Trees |
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| About the Author Rick SE Queensland 2nd February 2008 7:04pm #UserID: 602 |
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Scott G says... Hi Rick That looks like a very destructive problem you have there. My guava used to get some fruit fly attacks (before I netted it) and the damage could hardly be seen before the fruit ripened. So I would doubt your damage is from them. I think this could be Anthracnose. It has been a wet period which is what the disease likes. So if that is what it is then you need to keep the tree drier. More sun and wind are needed. Ok so stopping the rain is tricky :) but you could remove things that shade the tree, and things that act as a wind break for it. Also thin out the branches for better airflow through the tree. If you water it then do it in the morning so the sun can dry the tree off fast during the day. Water only the ground (not the leaves). Affected parts of the tree need to be removed and disposed of and not left on the ground at the base of the tree. You may consider regular applications of fungicide. | About the Author Scott G The Gold Coast 3rd February 2008 1:07am #UserID: 44 |
Rick says... Hi Scott, I intend to cut all the trees back considerably when I get a dry period. That should help the airflow.I will start a spray program for next season as well. I already spray my mangoes for anthracnose so I will just do the same for these. I took some samples into the local co-op the other day and they thought it was fruit fly. To be sure next year I will spray for both. Rick | About the Author Rick SE Queensland 3rd February 2008 8:13am #UserID: 602 |
SARATH says... Spray periodically with insecticide once the fruit start setting. In East Malaysia they cover the fruit with a kind of paper leaving an opening at the bottom for the heat to escape. This protect the fruit from being attacked by fruit flies. This week I plucked my first fruit in Sydney and so far no problem. | About the Author SARATH AUSTRALIA 6th May 2008 7:59pm #UserID: 932 |
Rick says... Thanks Sarath, I had just one fruit in a mesh type bag and that remained sting free so i guess it is fruit fly, they just attck the fruit so early on. Up here ther always seems to be some flowers on the trees but i guess tht is more due to the funny weather of the last few years. i have a mango in flower at present and also a stoneruit tree! Rick | About the Author Rick SE Queensland 12th May 2008 5:30pm #UserID: 602 |
Godwin says... Has anybody identified the real problem in the picture given above? I don't believe that it is the fruit fly causing that problem and neither can it be anthracnose. Please gurus can you identify the real causal agent, because here in Zambia this problem is very serious I also need information on controlor pest management information. | About the Author Godwin ZAMBIA 6th August 2009 7:51pm #UserID: 2628 |
Speedy says... It's most likely this little bug(ger) http://www.brisbaneinsects.com/brisbane_bugs/GreenCoonBugs.htm It causes a problem with growing tip of papaya plants too. A contant frustration on the sandy soils close to the coast while trying to grow papaya. They'd suck the soft upper parts of the main stem and petioles causing the growing tip to colapse and die off. Grrrrr! >:-# | About the Author Speedy Swan Hill, Nth Vic 6th August 2009 10:08pm #UserID: 0 |
| About the Author amanda Geraldton. WA 6th August 2009 11:12pm #UserID: 2309 View All amanda's Edible Fruit Trees |
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| About the Author amanda Geraldton. WA 7th August 2009 1:02am #UserID: 2309 View All amanda's Edible Fruit Trees |
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amanda says... Hi again - this link has a good picture of scab on a passionfruit...(but scab affects other plants as well) ... looks pretty similar do u think? http://www.annettemcfarlane.com/diseaseID.htm And some info from qld dpi: What causes the scabby appearance of fruit in NSW in wet seasons? The fungi Cladosporium herbarum and Cladosporium oxysporum cause the scabby appearance. Scab was sometimes a problem in cooler areas in moist shady pockets of the plantation but can now be found in more exposed plantings in the Tweed region. In the past, infections were generally not serious enough to warrant treatment but recently the problem has escalated in some areas. Attempts to control scab using a range of fungicides have been unsuccessful to date (see Problem solver, page 17 of this update | About the Author amanda Geraldton. WA 7th August 2009 10:45am #UserID: 2309 View All amanda's Edible Fruit Trees |
Godwin says... I am not yet convinced that the problem is caused by scab. I was almost accepting it but when I closely looked at scap symptoms on guavas it did not much with one in the picture.This problem is more of entomological than pathological. We shall plate it and see the culture and examine the spore. | About the Author Godwin 7th August 2009 5:30pm #UserID: 0 |
amanda says... No prob's Godwin - although passionfruit are a hard shell fruit and guava soft - so it will not look the same. Interesting how the fruit (above) has actually ruptured open - this makes me think of a fungus more than anything - they are good at splitting bark, fruit etc (human skin too - just ask a tinea sufferer!) Good luck with your search! :) | About the Author amanda Geraldton. WA 7th August 2009 7:15pm #UserID: 2309 View All amanda's Edible Fruit Trees |
| About the Author Godwin ZAMBIA 8th August 2009 7:30pm #UserID: 2628 |
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amanda says... Hi Godwin - this forum might not b the place for your answers - if u are a plant pathologist and we can't help u?? I would be getting out my trusty microscope and having a good look at some histopathology for starters. Then I would be talking to colleagues in your area/neighbouring countires - you may have a disease that is not present in australia. | About the Author amanda Geraldton. WA 9th August 2009 9:29am #UserID: 2309 View All amanda's Edible Fruit Trees |
| About the Author Godwin Zambia 17th August 2009 7:46pm #UserID: 0 |
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| About the Author amanda Geraldton. WA 17th August 2009 9:25pm #UserID: 2309 View All amanda's Edible Fruit Trees |
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Brendan says... Hi Rick & Godwin, I'd say your soil is too sour. Add dolomite, a good handfull to the sq. metre, scratch it into the soil, cover with lots of mulch and water in. Also, I'd add a bit of boron (borax) and Sulphate of Potash fertilizer as well. Spray the trees and fruit with 30g copperoxy chloride (a good tablespoon full) in 4.5 litres of water with 60ml of a good wetting agent. This will take a while to come good. | About the Author Brendan Mackay, Q 19th August 2009 7:14am #UserID: 1947 |
| About the Author Aahil kerala,india 12th October 2009 5:20am #UserID: 2893 |
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| About the Author Wayne Mackay QLD 12th October 2009 8:29am #UserID: 338 View All Wayne's Edible Fruit Trees |
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| About the Author Aahil kerala,india 13th October 2009 5:43am #UserID: 0 |
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| About the Author Sharma 27th October 2009 2:56pm #UserID: 0 |
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| About the Author Sonya Townsville QLD 19th November 2009 6:22pm #UserID: 3020 |
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