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Using Neem Oil in Flower

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Using Neem Oil in Flower

dangles 22 Replies 4,605 Views
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dangles

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I have 5 plants that just started to flower, week 1 or 2. They have spider mites, but not so bad that i'm seeing webs. I have sprayed them with neem oil. I am getting mixed results on whether its ok to use in flower or not. There is barely flower so to me it seems safe for the moment. Can anyone confirm or deny through experience that It is ok to use up until a certain point of flower?
 
If it’s barley in flower then it’s not going to be a big issue and important to try and knock down the mites BEFORE you’re in full flower (where your options are more limited). But there’s better choices like Spinosad or just using an isopropyl alcohol spray. If you were really set on using an oil I’d use a vegetable oil over the neem.

Post in thread 'Flowering but white spots galore! Spider mites or something else?'
https://www.thcfarmer.com/threads/f...r-mites-or-something-else.171956/post-3335100
 
I have 5 plants that just started to flower, week 1 or 2. They have spider mites, but not so bad that i'm seeing webs. I have sprayed them with neem oil. I am getting mixed results on whether its ok to use in flower or not. There is barely flower so to me it seems safe for the moment. Can anyone confirm or deny through experience that It is ok to use up until a certain point of flower?
Whether or not it is safe has always been controversial, and I always tend to lean toward worst-case on anything controversial. Better safe than sorry. I would never use neem oil during flowering. Even if it is safe, it makes the buds taste bad if used when too far into flowering.

Some good alternatives posted above. You can also fight fire with fire and bring over some good bugs of your own. Send in the ladybugs!
 
Whether or not it is safe has always been controversial, and I always tend to lean toward worst-case on anything controversial. Better safe than sorry. I would never use neem oil during flowering. Even if it is safe, it makes the buds taste bad if used when too far into flowering.

Some good alternatives posted above. You can also fight fire with fire and bring over some good bugs of your own. Send in the ladybugs!
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Biological control is proactive and once your have sticky buds and have pest problems, you’ve lost the game. It’s not that ladybugs don’t eat mites, but mites reproduce WAAAAAAAAY faster than ladybugs eat. So if you have a mite infestation you’ll need to spray.
 
Biological control is proactive and once your have sticky buds and have pest problems, you’ve lost the game. It’s not that ladybugs don’t eat mites, but mites reproduce WAAAAAAAAY faster than ladybugs eat. So if you have a mite infestation you’ll need to spray.
Yeah, so true. Can always start to prepare some perennials that attract the good predator bugs. Then it will be ready for the next grow season. My old neighbor used to always have sunflowers and marigolds around his garden. They attract all the good pollinators that also eat all the bad pests.
 
I vote against using neem. Used alone, it tends to burn plants. The way to avoid it is to emulsify the neem with detergent and water. The burning is caused by the shape of droplets on the leaves and how light is focused. The detergent solution is supposed to avoid burning. There are recipes for the mixture on the Internet.
 
I vote against using neem. Used alone, it tends to burn plants. The way to avoid it is to emulsify the neem with detergent and water. The burning is caused by the shape of droplets on the leaves and how light is focused. The detergent solution is supposed to avoid burning. There are recipes for the mixture on the Internet.
Just a heads up that “detergent” should never be used as it contains synthetic chemicals, often derived from petroleum, that strip the protective waxy coating (cuticle) from the leaves. You can use a non-detergent dish soap, but better to use a Castile soap or insecticidal soap. (Also if you have silica, it’s a good emulsifier, but doesn’t act as a spreader-sticker.)
 
I vote against using neem. Used alone, it tends to burn plants. The way to avoid it is to emulsify the neem with detergent and water. The burning is caused by the shape of droplets on the leaves and how light is focused. The detergent solution is supposed to avoid burning. There are recipes for the mixture on the Internet.
Does not burn plants in any way shape or form. Only if mixed to high of concentration. Neem oil has natural healing properties for plants and animals. Problem is how it makes the weed taste. What you propose is nothing more than mixing insecticidal soap with neem for a double punch. However it works better if you alternate with lower concentration. Neem, water, soap spray, water. Soap spray will burn if mixed wrong as well.
 
Spray your plants. Too many newbs. Some of us grew for 30 years. Neem is still used in the legal cannabis market. Use it diluted. Spray every 3 days. Neem, water, soap spray, water. The problem with 99 percent of growers is that they never get their plants wet. Hose that shit down. Remove the residue. Especially the night before you harvest. Clean the walls. Clean the floor. Check your dried weed as mites live for eons. I have found them in a month old dried bud. Mites suck. Brought to you by the Bayer company. DDT changed the reproduction of mites from a 10 egg carrier to a 10000 egg carrier.
 
Spray your plants. Too many newbs. Some of us grew for 30 years. Neem is still used in the legal cannabis market. Use it diluted. Spray every 3 days. Neem, water, soap spray, water. The problem with 99 percent of growers is that they never get their plants wet. Hose that shit down. Remove the residue. Especially the night before you harvest. Clean the walls. Clean the floor. Check your dried weed as mites live for eons. I have found them in a month old dried bud. Mites suck. Brought to you by the Bayer company. DDT changed the reproduction of mites from a 10 egg carrier to a 10000 egg carrier.
Complete disaster, when douchebag's try an corner the market only 20yrs earlier they were funding anti MMJ, by increasing the plague on home growing.
 
Or just grow plants that are resistant to bugs n mildew. And keep them healthy.

A healthy plant can tolerate more abuse, than one that's not.

I still see bugs now n then, but nothing concerning. I did have to spray ( Seven spray concentrate) early in veg (July ) for mites, and once for leaf hoppers that showed up outta nowhere.

I tend to do a thorough inspection every evening after work, and multiple times on my day off. Pick n smoosh anyone not invited, no free lunch on my plants. U taste...u die😄
 
Yes it's the red army
I should add, these plants are in an outdoor greenhouse.... It's wide open (now) and I think bad ventilation was a big part of the reason i got mites to begin with. Lady bugs are not an option (I did have some come in there naturally, but haven't seen any in awhile). I have since taken everything out of the greenhouse and sprayed everything down with bleach water. Weather is still warm here, so my plan is to keep the plants out of the greenhouse for about 2 weeks, then move them back in. I have been water blasting them every other day, but just used neem oil for the 1st time today.
 
Whether or not it is safe has always been controversial, and I always tend to lean toward worst-case on anything controversial. Better safe than sorry. I would never use neem oil during flowering. Even if it is safe, it makes the buds taste bad if used when too far into flowering.

Some good alternatives posted above. You can also fight fire with fire and bring over some good bugs of your own. Send in the ladybugs!
"Even if it is safe, it makes the buds taste bad if used when too far into flowering."
When is too far? Would I need to keep using neem 4-5 weeks to eradicate? Can I even expect to completely eradicate them? My hope was that I would be able to get rid of them in 2 weeks time, giving me a good 4-5 weeks to try and "get the neem out" per se.
 
just for fun... image i captured with the microscope...
 

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Just a heads up that “detergent” should never be used as it contains synthetic chemicals, often derived from petroleum, that strip the protective waxy coating (cuticle) from the leaves. You can use a non-detergent dish soap, but better to use a Castile soap or insecticidal soap. (Also if you have silica, it’s a good emulsifier, but doesn’t act as a spreader-sticker.)
Good information. Thanks.

Does not burn plants in any way shape or form. Only if mixed to high of concentration. Neem oil has natural healing properties for plants and animals. Problem is how it makes the weed taste. What you propose is nothing more than mixing insecticidal soap with neem for a double punch. However it works better if you alternate with lower concentration. Neem, water, soap spray, water. Soap spray will burn if mixed wrong as well.
I've seen reports to the contrary regarding burning. It has been discussed here many times. It isn't the neem itself that can burn. It's how oil droplets can form a lens that focuses light enough to cause burning. Using an emulsifier keeps avoids that. My understanding is it's more of a problem under artificial light that doesn't move like the sun moves. That said, it's up to the individual to decide whether to take the risk when other options are available.
 
I should add, these plants are in an outdoor greenhouse.... It's wide open (now) and I think bad ventilation was a big part of the reason i got mites to begin with. Lady bugs are not an option (I did have some come in there naturally, but haven't seen any in awhile). I have since taken everything out of the greenhouse and sprayed everything down with bleach water. Weather is still warm here, so my plan is to keep the plants out of the greenhouse for about 2 weeks, then move them back in. I have been water blasting them every other day, but just used neem oil for the 1st time today.
Hope it works out! To me the Ladies are always an option. 🤞
 
I have 5 plants that just started to flower, week 1 or 2. They have spider mites, but not so bad that i'm seeing webs. I have sprayed them with neem oil. I am getting mixed results on whether its ok to use in flower or not. There is barely flower so to me it seems safe for the moment. Can anyone confirm or deny through experience that It is ok to use up until a certain point of flower?
Athena IPM DESTROYED my spider mites. I now have clean healthy plants. I now mix big 5 gallon bucket of it and dip and swirl my clones/seedlings in it. No PM and no pests! Its expensive but worth it
 
My hope was that I would be able to get rid of them in 2 weeks time,
Add:

2 Tbsp Isopropyl Alcohol
1 tsp Castile soap

to a gallon of water and spray down the plant - making sure to cover the bottom of the leaves. (The mites can hide out under the large leaf vein running down the middle of a leaf.)

Cost you less than a $1 per gal and will kill the mites on contact and help dry up the eggs.

Also 3% hydrogen peroxide (mixed with water) will kill mites on contact. You can also use it for doing a “bud wash” after harvesting. Tons of video online. This video from Jorge Cervantes is billed as a PM wash, but is same concept.

 
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