Thrips? Mg? B? N? Dont know what. Help

Hi ppl,
this is my 3rd grow, but first time in this grow room(small one, 1,5x1m)...I have several problems with my plants. Info...

What type of medium? Soil

What brand and type of soil?
I forgot the brand name, but it was 10-5-5 (NPK)

Indoors or outdoors? Indoor

What strain? Seeds from local pot

How old are the plants?
Plants in pots(dark green on pics) are 8 weeks old, and those in growing bags(4L) are 2-3 weeks old.

What type of lights and how many watts? HPS 400W

How far from the lights?
From 30cm to 1,2m

What is your watering frequency and source of water?
Those in pots once in two days, those in grow bags once in 3-4 days. Water I use is from tap, but I leave it at least 48 hours before I use it.

What, how much and when was it fed? NPK?
Once a week, NPK 8-4-4

What is the medium/runoff pH and PPM if in hydro?
pH level in pots is around 7, and in growing bags around 7,2-7,5pH

What are the temps and humidity in the room?
From 15-17C when lights are off, to 25-32C when lights are on. Humidity around 40%.

What size pots?
4L pots, 4L grow bags

Any bugs? Look real close.
One of the plants have had small white or transparent ...worm or cateropilar on the backside of the leaf. Looked like Thrips to me.

Any other pertinent info?
Couple of plants dont look good....all of them are in grow bags, and one of them have THRIPS I think.... Other plants have other problems, but Im not sure what...

I LST plants in pots (dark green, bugger) thats why they look smaller(shorter)...cause they are in horizontal position.

Sorry cause of crappy pics. I dont have camera, I took them by phone...
U can see difference between plants. Some of them look healthy and some of them dont. If u look closer on pic #4, check out plant all the way on the right...looks like something is very wrong with it. And plants near that one also, but I think they dont have similar problem...

And the plant I took out from grow room. As u can see lower leaves are turning yellow and falling off, and on other leaves u can see brown spots, like burn spots, but ther arent actually. I saw and killed little white/transparent worm on the back of the leaf.

Please help me with other plants, and tell me how to get rid of this insect(with something I can find at home or in local store). Just dont tell me to use something I cant find on the market here(poor plant stuff market here)

Thank you!

boy,

I just went thru a Thrips problem myself. I found mine on the upper surface of the leaf (although I found some indications that they'd been on the bottom side too). They were causing white spots and trails on the upper leaf surface. If you'll use a 5x magnifier you ought to me able to see some tiny black dots (their poop) in and around these white areas.

I sprayed my plants with a mix of 10ml Malathion (50%) / gallon H2O. And for as many plants as you have I'm guessing a quart of this mix would be more than enough to get the job done. In the US you can pretty much find Malathion 50 at any standard gardening or hardware store. It's used widely on vegetable gardens. You shouldn't use it with in 2 weeks of harvest.

As to the rest of your problems I'm not real sure, but I will say they look a little under watered.

thanks
I dont know where to find that Malathion, so can I use some alternative?
Those plants in growing bags keep have a lot of moisture, cause bags keep water/moisture twice longer than in pots. I think that is not good, so Im planing to move the from bags to pots. Those in pots are doing great I think.
I also noticed that three of my plants started to show sex. Im not sure how it happened, but it did. My plants are on 18/6 from the beginning, and still are, but three, the best looking and the biggest one are showing little white pistils So I guess they are females which we like

But how is it possible that they are showing sex even if they were and are on 18/6?
Should I remove those sick plants from grow room, cause I think lot of them are still healthy, and if there really are those thrips on plants, I wouldnt like them to cross on other plants and to spread around... :/

could anyone help?

Dude,

I'm no expert but the yellowing might be because your under feeding them.
I had the same problem with my blue cheese and it turned out she was just hungry!
Well manly for (n) but hungry all the same!

What type of nutes you using?

I can't really comment on the thrips as i've never had to deal with them (touch wood)!

That's good news about the pistils and i wouldn't worry about them showing sex. Some plants just mature that bit quicker!
Have you got the space to make a flower room? That way you could flip the lights on those girls now!!

Anyways all the best dude

TH

Yea, I gave them food...Im giving them food once every week. They(those smaller, yellow and sick....) are now around 5 weeks old. First time(two weeks after germination) I gave them less then half of dose of nutes. At that point they already had yellow leaves(first, bottom ones). A week after that I gave them half and a lil' bit more nutes. Third time(last for now) I gave them 3/4 of nutes. They didnt get better a lot, but some of them stoped to get worse which is good. On the other hand two of them look really sick. Like they have nutes or pH problem and Thrips or some other worms... I'll make another feedback later today.

Nutrient Disorder Problem Solver
To use the Problem-Solver, simply start at #1 below. When you think you've found the problem, read the Nutrients section to learn more about it. Diagnose carefully before making major changes.

1) If the problem affects only the bottom or middle of the plant go to #2. b) If it affects only the top of the plant or the growing tips, skip to #10. If the problem seems to affect the entire plant equally, skip to #6.

2) Leaves are a uniform yellow or light green; leaves die & drop; growth is slow. Leaf margins are not curled-up noticeably. >> Nitrogen(N) deficiency. b) If not, go to #3.

3) Margins of the leaves are turned up, and the tips may be twisted. Leaves are yellowing (and may turn brown), but the veins remain somewhat green. >> Magnesium (Mg) deficiency. b) If not, go to #4.

4) Leaves are browning or yellowing. Yellow, brown, or necrotic (dead) patches, especially around the edges of the leaf, which may be curled. Plant may be too tall. >> Potassium (K) deficiency. b) If not, keep reading.

5) Leaves are dark green or red/purple. Stems and petioles may have purple & red on them. Leaves may turn yellow or curl under. Leaf may drop easily. Growth may be slow and leaves may be small. >> Phosphorus(P) deficiency. b) If not, go to #6.

6) Tips of leaves are yellow, brown, or dead. Plant otherwise looks healthy & green. Stems may be soft >> Over-fertilization (especially N), over-watering, damaged roots, or insufficient soil aeration (use more sand or perlite. Occasionally due to not enough N, P, or K. b) If not, go to #7.

7) Leaves are curled under like a ram's horn, and are dark green, gray, brown, or gold. >> Over-fertilization (too much N). b) If not, go to #8…

The plant is wilted, even though the soil is moist. >> Over-fertilization, soggy soil, damaged roots, disease; copper deficiency (very unlikely). b) If not, go to #9.

9) Plants won't flower, even though they get 12 hours of darkness for over 2 weeks. >> The night period is not completely dark. Too much nitrogen. Too much pruning or cloning. b) If not, go to #10...

10) Leaves are yellow or white, but the veins are mostly green. >> Iron (Fe) deficiency. b) If not, go to #11.

11) Leaves are light green or yellow beginning at the base, while the leaf margins remain green. Necrotic spots may be between veins. Leaves are not twisted. >> Manganese (Mn) deficiency. b) If not, #12.

12) Leaves are twisted. Otherwise, pretty much like #11. >> Zinc (Zn) deficiency. b) If not, #13.

13) Leaves twist, then turn brown or die. >> The lights are too close to the plant. Rarely, a Calcium (Ca) or Boron (B) deficiency. b) If not… You may just have a weak plant.



may help you out

as far as your bugs go hot shot no pest strips i hear they kill anything they kill mites.

i think you're from the UK? they dont sell them there i hear, but you can get them online

Yea they look kinda hungry you might need to give them some nutes, also do the white bugs jump from leaf to leaf or do they stay still. If you do have a bug infestation take a your plants out the grow area and spray all around the grow room with home defence pesticide, and order some neem oil off the internet, neem oil will kill any pest no matter what kind. What you do with neem oil is take 1 tbls of organic soap, to a bottle of neem oil and spray plants and top of the soil once every three days or untill they are all gone. Also jacking the humidity up to 80% will also help get rid of the bugs but be sure to have good air cirulation to prevent mould. The plants look like they have a nitrogen, and magnesium defficiency and possibly a iron deficiency. Go to the store and get some epsom salt use 1 tbls to 1 gallon this can be mixed with you nutrients, epsom salt will help the magnesium def. For the nitrogen defficency you will need a High N fertilizer with a low PK. Before you try any of this I would flush those plants out real good, oh yea and if you have a iron def which it looks like could be a possibility I would scrape the rust off a old nail on the top of your soil and that will help if this is a iron defficiency. If none of this helps the hardware store sells dolomite lime and this will help with balance PH and will fix a calcium defficency which also a possibility by the looks of these plants. They also look very underwatered, maybe you should try to give a very thourough watering 2 times a week and see if this helps. Hopefully you dont have root rot, have you overwatered them because overwatering and underwatering have almost the same affect on a plant, so it is kinda hard to tell the diffrence. Anyway if I helped please +rep, I new to the RIU community and would highly appreciate it, well I hope I helped you out good luck on the plants.

Thank u friends!

Those bugs are not jumping around.... they just make some white spots(like dried salt water) on top side of leaves, and on the bottom they sh.... some black stuff.....

I tried a lot of different solutions about nutes...I flushed them, gave them lot of N, tried with different kind of nutes..... nothing helped....

Maybe my pH meter isnt working propertly.... I have to get new one before I go to flowering(which I planned next week....)

Here are some new pics....tell me for that bigger plant....she(is female) have two fan leaves died, but all other are in perfect condition. Do u thin she had problem before and now its somehow solved?

I bought pH, moisture and light volume meter. 3 in 1. Its great! It have 2 probes, and u can mesure all those things
My soil pH is lower that I taught... its 5.8pH.How can I make it higher using stuff that I can buy or use, but not in garden shop(they know me....I dont like them....)...
Help

One more thing....

I bought some nutes in cristal form. It's "GroGreen Starter", 12-42-12(NPK). When I was reading about NPK in flowering stage in many guides, I noticed that during flowering u need a lot of P element, thats why I decided to buy this fertilizer. I have another, other kind, flowering stage fert, but its 5-5-6 NPK. I think its not good enough, cause there is a lot of N and same amount of P, just a little bit more K.... Ehat do u think?
Is this cristal fert good for plants? Another thing is how to use it.... On the bag it says "Use it once a week(drop by drop (??!!!?!)). Make 0.1% solution."

Which mean...? I went to their official site, and there is other kinda manual. It says "In general apply 0.25-0.75 gram per liter of irrigation water."


What should I do? How should I use it(how to mesure 0.5 grams...???)
Also, I tried to mix it with water, and its ok. But, I mesured pH after adding this cristal fert and pH dropped a lot. It was like 7.5 and after adding veeeeery small amount(like 10 pinchs of fert) of fert it dropped on 4.5pH...

So I dont get it....If I put correct amount of this fert in water it will lower pH a lot, and, if I get it right, when I water my plants with that water solution, soil pH will drop a lot.
Am I right?

anyone?

Its wierd cause they(those worms) attacked only two plants. Others are fine. I cant even find neem oil.... But someone said that adults dont make a lot of trouble, than neem oil aint gonna help me anyway... am I right? Are they actually eating roots(babies)?

Also I figure out whats going on with some plants.... I guess some of them have iron deff. , and some Mg deff. Also, I used different mixies of soil(from store) for plants. For example in 5 pots I have one kind of soil in 5 other pots again different kinda soil.... Thats cause I couldnt buy that much soil at once, and after I couldnt find same soil in store. Some of them grow in high alkaline(7.2-7.5pH) and some in high acid(5.5-6.2pH) soil. Im trying to correct that....we'll see what will happen.
As I said, but no one red it, I used 12-42-12 cristal plant food which, when added in water, make it high acidic, like 4.5-5pH. I guess its not good, so why does it lower pH that much? How its gonna effect my soil pH?