What's new
  • ICMag with help from Landrace Warden and The Vault is running a NEW contest in November! You can check it here. Prizes are seeds & forum premium access. Come join in!

What Causes A plant To Yellow Overnight and Fan Leaves Droop?

krunchbubble

Dear Haters, I Have So Much More For You To Be Mad
Veteran
Have you checked for root aphids?
They are impossible to see without a loop.
Also, I had dying plants on my hands, and treated with aspirin. 325 milligrams per gallon of water, and plants made a miraculous recovery in 48 hours.
The aspirin boosts the plants immune system. Can be used as foliar spray also.
Grasping at straws here, but good luck.



appreciate it! never had root aphids and am pretty sure i dont, but will look. have merit 70 for any root bug problems.

aspirin huh? may try anything at this point......
 

!!!

Now in technicolor
Veteran
I'd keep a sample of the res water, roots and leaves and medium and get them tested at a lab. Speak to the author of the offgassing thread about where/how you can get your samples tested.
 
E

el Dream Reader

I'm sorry to see your having problems again Krunch. It looks like Fusarium wilt to me, usually caused by high water temps, lack of calcium, overuse of nitrogen or overly soggy growing medium. Look at the base of the plant for a brown ring and try cutting the base of the stem in half and look for reddish/brown coloration. Once that Fusarium takes hold it's a death sentence due to damping off, isolation of affected plants and prevention is the key. To prevent it, I'd switch from coco to something less absorbent or mix in some perlite and in high temps I'd use bleach in your res. BLEACH!!!
 

Sam the Caveman

Good'n Greasy
Veteran
Yeah, fusarium will cause damage like you described.

2-3 days = Death

It attacks the plant from the base of the stem down the main taproot. So this might be why the roots look good from the outside.

I've used physan 20 sprayed right at the base of the stem all around it, so it would saturate the main taproot, and then do a folair spary of systemic fungicide like propiconizole for a few days to build it up within the plant.

I hate to see this, its devastating to see your plants do this.

If this isn't it, I hope you figure it out, I'll be watching.
 

ImaginaryFriend

Fuck Entropy.
Veteran
mrdizzle has suggested an air gap between the solution and the coco.

el Dream Reader has suggested the possibility of a invasive fungus that uses the fluid conducting vessels to infest the plant. It's progression is characteristically similar to the wilt suffered by your girl.

Retro brought up root aphids.

mrdizzle remarked that N deficiency doesn't kill plants overnight. This is a true statement. But what happens that causes an N deficiency that eventually kills the plant? How long has this cause been in action? Did the problem start two weeks ago, and the general health of the plant didn't show symptoms until two days ago?

Root aphids and that nasty fungus both seem like decent canidates for such an infestation that shows similar symptoms to what your suffering with.

The off-gassing thread has raised the issue of toxicity related to the grow set up. But, particularly with a RDWC, it seems reasonable to expect the toxicity to be spread more evenly through out the grow. Is there something strange immediately beside the dead girl's spot? Is it nearest to an inflow duct, or a particular piece of equipment? More generally, is there anything unique about her place in the room?

If you've got a microscope, maybe breaking apart the root ball is in order. (Keeping samples might be reasonable too.) I think aphids should be around for more than the day she's been sitting outside, but I can only think the sooner the better.

I used your long standing success with coco as one of my motivators to moving away from more complicated systems. I lost 8 months to failure. I know mrdizzle's fear. It is why I have my girls in coco right now. I really want to play around with RDWCs again, but I really want a predicable garden more.

Best of luck. I hope you find the cause.
 

Sam the Caveman

Good'n Greasy
Veteran
Fusarium transmits via spores in the air.

Ozone generators, hepa filters and treating the infection.


My cloning ability went to 0 because of fusarium, and eventually my mothers got infected and they died too.
 

dusto2k3

Member
well, that does make a lot of sense. Explains why everything died no matter what I did. I even repotted, but to no avail.
 

Sam the Caveman

Good'n Greasy
Veteran
I bought my ozone generator on ebay for $25.

It did come from china, but it works well and cost much less than Ozone Jr. by CAP at $90+.

don't mean to derail the thread, just trying to help.

I hope you find out what's wrong Krunch.
 

krunchbubble

Dear Haters, I Have So Much More For You To Be Mad
Veteran
I'm sorry to see your having problems again Krunch. It looks like Fusarium wilt to me, usually caused by high water temps, lack of calcium, overuse of nitrogen or overly soggy growing medium. Look at the base of the plant for a brown ring and try cutting the base of the stem in half and look for reddish/brown coloration. Once that Fusarium takes hold it's a death sentence due to damping off, isolation of affected plants and prevention is the key. To prevent it, I'd switch from coco to something less absorbent or mix in some perlite and in high temps I'd use bleach in your res. BLEACH!!!

Yeah, fusarium will cause damage like you described.

2-3 days = Death

It attacks the plant from the base of the stem down the main taproot. So this might be why the roots look good from the outside.

I've used physan 20 sprayed right at the base of the stem all around it, so it would saturate the main taproot, and then do a folair spary of systemic fungicide like propiconizole for a few days to build it up within the plant.

I hate to see this, its devastating to see your plants do this.

If this isn't it, I hope you figure it out, I'll be watching.

Fusarium transmits via spores in the air.

Ozone generators, hepa filters and treating the infection.


My cloning ability went to 0 because of fusarium, and eventually my mothers got infected and they died too.




pics of my stem at base level. not seeing what you explained, maybe you do? have to find my loop......

 

Sam the Caveman

Good'n Greasy
Veteran
From my experience, if you let the dead plants sit a while after they die, thats when you will actually see a white fungus on the outside of the stem. Its the same with cuttings or a plant with roots.

However its probably not good to do this if you have a room full of healthy plants. In my instance everything was already dead. I was just lazy for a few days and didn't immediately clean it up, thats when I noticed the white fungus growing at the base of the stem.

Another indicator of fusarium will be if the stem is loose. I could grab my infected plants by the base of the stem, that had recently been watered, and lift up the container. I noticed there was lots of slack/play/wiggle room between the stem and the medium. Even at this point of detrimental infection there was no white fungus or any signs visually of a fungus.
 

Sam the Caveman

Good'n Greasy
Veteran
Krunch, in the first picture it looks like the stem is pretty loose in the coco, but it might just be from you handling it. I don't know how aggressively you removed it, that might make it look like that.
 

krunchbubble

Dear Haters, I Have So Much More For You To Be Mad
Veteran
Krunch, in the first picture it looks like the stem is pretty loose in the coco, but it might just be from you handling it. I don't know how aggressively you removed it, that might make it look like that.



stem was not loose......
 

krunchbubble

Dear Haters, I Have So Much More For You To Be Mad
Veteran
you fucking guanaherpasyphilaids infested motherfuckers!!!!!!

omw to go get some 100 proof vodka and diet 7up.........

 

krunchbubble

Dear Haters, I Have So Much More For You To Be Mad
Veteran
check this, i also water 6 other plants in my room and my veg room with this same exact nutrient solution......

there all fine.........
 

Sam the Caveman

Good'n Greasy
Veteran
run an ozone generator in there for a while, I don't think its in your water.

That wilt looks mighty familiar.

fusarium wilt in a tomato plant below

july-16-019.jpg
 
M

medfinder

I'm sorry to see your having problems again Krunch. It looks like Fusarium wilt to me, usually caused by high water temps, lack of calcium, overuse of nitrogen or overly soggy growing medium. Look at the base of the plant for a brown ring and try cutting the base of the stem in half and look for reddish/brown coloration. Once that Fusarium takes hold it's a death sentence due to damping off, isolation of affected plants and prevention is the key. To prevent it, I'd switch from coco to something less absorbent or mix in some perlite and in high temps I'd use bleach in your res. BLEACH!!!


Fusarium wilts and blights:essential data

Disease Name, Other Names, Crops Affected Causative Agent, Synonyms,
Description of the Agent Symptoms, Prevention and Treatment
Other Comments Disease nameFusarium wilt Other NamesFusarium vascular wiltCausative Agent

Fusarium oxysporumSynonymsVariants of F. oxysporum that are specific for different plant hosts are known and differentiated as f. (formae) or f.sp. (forma speciae); e.g. F. oxysporum f. sp. lycopersici attacks the tomato (Lycopersidon esculentum)Crops AffectedA wide range of vegetables, plantation crops, ornamentals and turf grasses are attacked.Description of the AgentFusarium oxysporum is an imperfect fungus (one with no known sexual stage) belonging to the ascomycetes or sac fungi. It spreads by means of asexual spores (microconidia, macroconidia, or chlamydospores.) Chlamydospores can survive in the soil and mycelium can survive and overwinter in the waste from infected plants. The fungus is extremely widespread (also described as a cosmopolitan distribution) and once it becomes established in an area, it is essentially impossible to eliminate it.SymptomsThe first sign of Fusartium vascular wilt is often a yellowing or clearing of the outer edges of younger leaves followed by drooping. The infection is already well established as the fungus usually invades the plant through the roots where it travels through the xylem of the plant that moves water and nutrients from the root to the crown of the plant. As the mycelium ramifies through the plant, the xylem becomes obstructed and the plant wilts and dies. Older plants may survive but are often stunted in growth. Typically, infected plants show a ring of dead brown vascular tissue near the bottom of the stem..Prevention and TreatmentIt is very difficult to remove F. oxysporum when it becomes established as it can grow saprophytically (on dead organic matter such as crop waste) in the absence of a susceptible crop. The only effective response is soil sterilization, which is far too expensive for most farmers. Some control can be achieved with fungicides but the use of resistant cultivars of plants is the preferred approach.,Other CommentsFusarium wilt of tomato is probably the most economically significant disease caused by F. oxysporum, but it shows a large number of formae speciale that are specific pathogens of other plants including:
  • Asparagus;
  • Banana;
  • Carnation;
  • Cotton
  • Cucurbits (squash, melons, cucumbers);
  • Ginger;
  • Snowpeas;
  • Soybean.
F. oxysporum has been considered a biological herbicide by the US and Russia. The US has supported research into the development of a coca-specific variant to use against cocaine plantations in Colombia and the fUSSR attempted to develop one that would attack the opium poppy, apparently to prevent Afghan mujahideen using opium sales to pay for weapons to oppose the Soviet invasion of the country.


WE PAID TAXES FOR THIS CRAP....THIS SPREADING TO SO MANY PLACES..
 

Latest posts

Latest posts

Top