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10-08-2013, 09:42 AM | #1 (permalink) |
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Sh-3640 vs FHIA-01
Both pups received on May 21 & planted in the ground on July 23.
may 21 Both cultivars are planted side by side and the tall grass provides a perfect environment for leaf diseases to flourish. oct 8 These next photos are of 4 different lower leaves from each plant. all photos oct 8
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10-08-2013, 12:04 PM | #2 (permalink) |
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Re: Sh-3640 vs FHIA-01
I have no idea what those spots could be on your leaves, but It would probably be beneficial to clean out the surrounding area from all the other grass and plants, so your two banana plants get more air and light and do not have to compete with everything else.
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10-08-2013, 01:52 PM | #3 (permalink) | |
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Re: Sh-3640 vs FHIA-01
SH-3640
Fungal diseases Fusarium wilt (Fusarium oxysporum f. sp. cubense) Race 1: 'SH-3640-10' is considered to be susceptible but tolerant to Foc race 1 after field evaluation trials in Australia showed that plants exhibited few external symptoms of Foc infection and produced good bunches, but the vascular tissues of the rhizomes and pseudostems were discoloured[1]. Race 4: 'SH-3640-10' is considered to be resistant to Foc race 4 after field evaluation trials in Australia showed that very few plants had vascular discolouration of the rhizome and pseudostem[1]. Black leaf streak (Mycosphaerella fijiensis) Sigatoka leaf spot (Mycosphaerella musicola) Eumusae leaf spot (Mycosphaerella eumusae) FHIA-01 Fungal diseases Fusarium wilt (Fusarium oxysporum f. sp. cubense) 'FHIA-01' has been classified as susceptible but highly tolerant[17] and as resistant[18][3][11][19][1][4][20] to Fusarium oxysporum f. sp. cubense races 1, 2 and 4. Black leaf streak / black Sigatoka (Mycosphaerella fijiensis) 'FHIA-01' has been classified as resistant to Mycosphaerella fijiensis[21][2]. However, breakdown of resistance was observed in Samoa in 2006[22]. Sigatoka leaf spot / yellow Sigatoka (Mycosphaerella musicola) 'FHIA-01' has been classified as both resistant[15] and susceptible[5] to Mycosphaerella musicola. During field evaluation trials in Australia for Fusarium wilt, though in field unsprayed for leaf diseases, 'FHIA-01' developed very few symptoms of 'yellow Sigatoka' leaf spot[23]. Eumusae leaf spot (Mycosphaerella eumusae) 'FHIA-01' has been classified as susceptible to Mycosphaerella eumusae but this can be controlled by regular de-leafing[8]. Crown rot 'FHIA-01' has been classified as resistant to crown rot[13][4] Quote:
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10-08-2013, 07:27 PM | #4 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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In the general context of less dependence on chemicals this pdf might be worth a glance or two. http://www.cnpmf.embrapa.br/publicac...ochemicals.pdf "STRATEGIES TO REDUCE THE USE OF AGROCHEMICALS IN BANANA AND PLANTAIN" shannon shannon.di.corse@gmail.com |
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10-09-2013, 08:34 PM | #5 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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These leaf diseases have only been an inconvenience over the last couple decades, but realize that they could become problematic. I've seen how they devastate my neighbors fields year after year.
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10-09-2013, 10:15 PM | #6 (permalink) |
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Re: Sh-3640 vs FHIA-01
I have been battling sigatoka all Summer. It hasn't been terrible, but certainly worse than in previous years.
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10-10-2013, 05:49 AM | #7 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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This is the situation on Trinidad. Sigatoka and the oil/gas boom were the bane of bananas planted for local consumption. All that local farmers grow commercially now are plantains, because the higher prices obtained support the increased cost of leaf pruning, field sanitation, fertilisation & fungicidal or fungistatic chemicals or other preparations. The change required is massively polyclonal cultivation of bananas. The farm's output is thus extremely varied. The business model becomes complex; because the market for new bananas/cooking bananas/plantains is uncertain. But, IMHO, it's do or die. shannon shannon.di.corse@gmail.com |
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10-10-2013, 12:32 PM | #8 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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I practice extreme leaf pruning, it is very effective especially when used with a weather forecast. Field sanitation, fertilisation & fungicidal or fungistatic chemicals or other preparations might be necessary in the future.
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10-10-2013, 04:54 PM | #9 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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Prevention and control of banana leaf spot diseases (sigatoka) |
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10-10-2013, 06:25 PM | #10 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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Apart from the traditional plantains - which to me represent one fertilisation event followed by centuries of somatic mutation - there are small amounts, scattered of here and there, tetraploid plantain hybrids and what appears to be a secondary triploid plantain hybrid that have leaked into the island. Some are definitely worth field testing. They lack the apical dominance of plantains; seem far less vulnerable to Cosmopolites and some nematodes; are more tolerant of Black 'Sigatoka'; and do not suffer from mat rise (they can ratoon for quite a few cycles). There are a few ABB/"BBB types... mostly "Orinoco" like varieties; and Saba & Pelipita do exist but are extremely rare. So is Pisang awak. These types and AABs that bear angular fruit are all called "Moko" or "Moko Plantain". They are not appreciated and do not sell...mostly because they are traditionally scorned by the populace. Red banana & Green Red are not appreciated - there is some sort of taboo about them being poisonous... The cooking bananas par excellence here are immature Cavendish types; and Sucrier is eaten cooked, used just as the ripening process has begun. All the meagre green immature Cavendish production is - to me derived from incidental or subsistence farmer surplus... Gros Michel is hard to find on the markets - and is never cooked. The local production of dessert bananas is sporadic and consists of varieties of Silk & Sucrier. Mysore is scorned and ripe bunches are left to rot in the abandoned banana fields. Actually it makes a good cooking banana. Trinidad imports quantities of packaged snack "plantain chips" from Ecuador and, I think, Costa Rica. So there you have it. shannon shannon.di.corse@gmail.com |
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10-12-2013, 07:01 AM | #11 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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FYI, a farmer that waits that long to prune leaves would be better off to learn how to fish.
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10-12-2013, 02:43 PM | #12 (permalink) |
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Re: Sh-3640 vs FHIA-01
I think there is a lot more going on in that video it looks more like a combination of banana weevils, lack of fertilizer and water, sigatoka and farmers that are too poor to improve their situation.
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10-12-2013, 06:35 PM | #13 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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and I've always considered it to be Banana Heaven. The great thing about banana farming, is that every day you get the opportunity to improve your situation.
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10-12-2013, 07:11 PM | #14 (permalink) | |
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Re: Sh-3640 vs FHIA-01
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PR-Giants & All, The big problem with tropical farming, in my opinion, is that the people who write the handbooks; the people who decide extension policy; and the people who create the models that the agricultural banks consult - have most likely never farmed continuously over even a half-decade. The greatest obstacle to farming is the chaotic (mathematically) response of the farm to weather and other abiotic & biotic factors. I have tended to grow bananas in small blocks of about 500 sf to 10,000 sf separated by other vegetation. While I do see correlation with such things as relative humidity, surface & internal drainage and sigatoka... by and large there are "other factors" that inject totally surprising responses into the mix... I can only surmise as to the mechanisms responsible... My key rules from a small business perspective: keep costs as low as possible; make output as varied as possible; and don't ever borrow on your expected crop. The losers are ALWAYS the specialist farmers who go by the book; high inputs; single crop; maximise production; fertilise the hell out of the place; stand by with expensive pesticides; insecticides; herbicides etc. And those who believe that a projection on a piece of paper will come true. You have to be able to diagnose a problem fast; come up with a fix - and I repeat - NEVER bet the farm on a single crop. shannon shannon.di.corse@gmail.com |
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