Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 532968 times)

mangoba · « **Reply #2100 on:** October 02, 2021, 01:51:58 PM »

Quote from: Guanabanus on October 01, 2021, 08:38:37 PM

If the soil isn't already high in Ca, B, and Fe, you will also need to add those.

Obrigado!

This is just a suggestion for the ratios that I could make from fertilizers that I already have. My soil is 8.4pH/90% calcareous/highly leaching sand.

I use Sequestrene for Fe, but my B is low! Could you please suggest a ratio (even with modifying what I posted earlier), my goal is to come up with a fertilizer that I use every time I water to simulate a slow release fertilizer for young seedlings < 1.5 years old.

Guanabanus · « **Reply #2101 on:** October 02, 2021, 08:53:46 PM »

For fully coated, slow-release fertilizer, to apply twice a year, it could have up to 0.3% Boron. For uncoated granular, up to 0.22%. For weekly liquid application, I don't know, as I never do that.

Lovetoplant · « **Reply #2102 on:** October 04, 2021, 02:43:42 AM »

Har, is kocide3000 good to use on mango trees? Can it be use as preventive or only use when disease symptoms appear? I live close to the beach, fog and high humidity are very common. Thank you

Guanabanus · « **Reply #2103 on:** October 05, 2021, 02:00:28 PM »

Kocide (Copper Hydroxide) fungicide/bactericide works mainly as a preventive, when sprayed before symptoms appear. It has been used on mango trees
in conventional agriculture since at least the 1970's, usually tank-mixed with mancozeb/Manzate. Mancozeb now gets a lot of bad press from California.

Julie · « **Reply #2104 on:** October 05, 2021, 03:32:02 PM »

Black spots on the branches of a Glenn mango tree. The black spots cannot be scratched off and have little white dots on them. What is this?

INaba · « **Reply #2105 on:** October 06, 2021, 08:14:23 AM »

Can I still prune and tip mango trees?
How late we can do tipping mango branches?
Thanks, irene

Guanabanus · « **Reply #2106 on:** October 06, 2021, 09:51:08 AM »

Fungus. Spray with Copper, repeatedly. In cool time of year, use spray-oil.

Guanabanus · « **Reply #2107 on:** October 06, 2021, 09:58:45 AM »

INaba,

Removal of entire branches, to open up the canopy, can be done at any time of year, except during flowering (just because of difficulty avoiding damage to the remaining flowers). Open canopies are more productive and less diseased.

Tipping should be done soon after harvest; if done later, next year's flowering may be cancelled (but not always).

INaba · « **Reply #2108 on:** October 06, 2021, 12:26:32 PM »

Har Thanks a lot for clarifying this situation for me.

Julie · « **Reply #2109 on:** October 06, 2021, 12:37:42 PM »

Quote from: Guanabanus on October 06, 2021, 09:51:08 AM

Fungus. Spray with Copper, repeatedly. In cool time of year, use spray-oil.

What type of oil do you recommend? Neem oil? Do I just need to apply the oil & copper to the fungus spots or to the entire tree? Is this going to get worse & kill the tree?

Lovetoplant · « **Reply #2110 on:** October 06, 2021, 02:19:39 PM »

Quote from: Guanabanus on October 05, 2021, 02:00:28 PM

Kocide (Copper Hydroxide) fungicide/bactericide works mainly as a preventive, when sprayed before symptoms appear. It has been used on mango trees
in conventional agriculture since at least the 1970's, usually tank-mixed with mancozeb/Manzate. Mancozeb now gets a lot of bad press from California.

Thank you Har. So can I spray my tree as often as I want to, regarding diseases prevention?
If diseases start to appear, what products would you recommend? I am new to mango.

Guanabanus · « **Reply #2111 on:** October 06, 2021, 05:29:19 PM »

Julie,

Spot spray the visible problem and close by. In weather conducive to the spray's staying wet for half an hour or so, use either Neem Oil or Spray-Oil, per label directions.

Julie · « **Reply #2112 on:** October 06, 2021, 06:29:04 PM »

Quote from: Guanabanus on October 06, 2021, 05:29:19 PM

Julie,

Spot spray the visible problem and close by. In weather conducive to the spay's staying wet for half an hour or so, use either Neem Oil or Spray-Oil, per label directions.

Should I use neem oil only now since it's the cooler season or spray both neem and copper together? Also how often should I repeat the sprays? Thank you!

Homeby5 · « **Reply #2113 on:** October 26, 2021, 05:19:57 PM »

Look at these leaves? Two of my trees look like this? I haven't fertilized in about 4 months and we have got a lot of rain. I am in Keys. Should I be concerned?

Guanabanus · « **Reply #2114 on:** October 27, 2021, 01:52:31 PM »

Use slow-release 8-2-12 palm fertilizer.

Homeby5 · « **Reply #2115 on:** October 29, 2021, 01:19:45 PM »

Here is another pic of another Mango Tree. With all the rain...do you think it's fungus?

Guanabanus · « **Reply #2116 on:** October 29, 2021, 01:30:45 PM »

Increase Potassium, spray with Copper, and monitor for thrips and mites through Fall and Winter.

mangoba · « **Reply #2117 on:** October 30, 2021, 01:59:47 PM »

Do you have any idea on how much Chloride is beneficial and not harmful in irrigation water please? All fertilizers I use are Cl free.

Guanabanus · « **Reply #2118 on:** October 30, 2021, 09:05:29 PM »

I have not found any clear answers about mangos' tolerance of Chloride or Sodium, except that tolerance varies tremendously from one root-stock to another, as well as per scion grafted on those different root-stocks. If you can get some 13-1 seeds(or 13/1), that might be of help.

mangoba · « **Reply #2119 on:** October 31, 2021, 07:08:07 AM »

Quote from: Guanabanus on October 30, 2021, 09:05:29 PM

I have not found any clear answers about mangos' tolerance of Chloride or Sodium, except that tolerance varies tremendously from one root-stock to another, as well as per scion grafted on those different root-stocks. If you can get some 13-1 seeds(or 13/1), that might be of help.

Great answer! Do you have an idea about irrigation water Chloride range that is used without showing any damage? I'm suspecting that 5ppm in my water analysis is not enough.

Guanabanus · « **Reply #2120 on:** October 31, 2021, 12:34:18 PM »

Of no concern.

Victoria Ave · « **Reply #2121 on:** October 31, 2021, 01:29:21 PM »

The last flush of growth on my Valencia Pride has started showing yellow between veins. It was looking healthy before. I would usually spray with Southern AG spray as it looks like mag, zinc, iron deficiency.

However, I still have fruit hanging on the tree. Should I just spray after harvest, or should I throw down my iron sulfur pellets which I would usually do around this time but I've heard not to fertilize the tree when nearing harvest.

Thanks!

Guanabanus · « **Reply #2122 on:** October 31, 2021, 10:27:23 PM »

While the fruits are on, fertilizing with Nitrogen can make the fruits watery and prone to internal breakdown.

I don't know of reasons not to apply light amounts of other nutrients when the fruits are on.

mangoba · « **Reply #2123 on:** November 01, 2021, 07:42:56 PM »

Are there nutrients that tend to suffer most as the weather cools down?

Paquicuba · « **Reply #2124 on:** November 02, 2021, 01:32:58 PM »

My fruit punch tree is stunted. Need the experts to please shed a light on what the heck is happening to it. As you can see in the images, it tries to flush, but the buds simply dry out. Thanks so much for the help!!

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Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 532968 times)