Rick
SE Queensland
23rd January 2008 10:40am
#UserID: 602
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
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
Correy
Woolloongabba, QLD
2nd February 2008 2:07pm
#UserID: 3
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Rick
SE Queensland
2nd February 2008 7:04pm
#UserID: 602
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.
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.
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
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
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.
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.
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
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
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.
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.
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! >:-#
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! >:-#
Speedy
Swan Hill, Nth Vic
6th August 2009 10:08pm
#UserID: 0
amanda
Geraldton. WA
6th August 2009 11:12pm
#UserID: 2309
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amanda
Geraldton. WA
7th August 2009 1:02am
#UserID: 2309
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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
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
amanda
Geraldton. WA
7th August 2009 10:45am
#UserID: 2309
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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.
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.
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! :)
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! :)
amanda
Geraldton. WA
7th August 2009 7:15pm
#UserID: 2309
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Godwin
ZAMBIA
8th August 2009 7:30pm
#UserID: 2628
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.
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.
amanda
Geraldton. WA
9th August 2009 9:29am
#UserID: 2309
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Godwin
Zambia
17th August 2009 7:46pm
#UserID: 0
amanda
Geraldton. WA
17th August 2009 9:25pm
#UserID: 2309
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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.
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.
Brendan
Mackay, Q
19th August 2009 7:14am
#UserID: 1947
Aahil
kerala,india
12th October 2009 5:20am
#UserID: 2893
Wayne
Mackay QLD
12th October 2009 8:29am
#UserID: 338
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Aahil
kerala,india
13th October 2009 5:43am
#UserID: 0
Sharma
27th October 2009 2:56pm
#UserID: 0
Sonya
Townsville QLD
19th November 2009 6:22pm
#UserID: 3020