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Offlinepeyotillo
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Registered: 07/19/14
Posts: 176
Loc: Yurp
Last seen: 1 year, 10 months
Pest problem?
    #21006174 - 12/21/14 03:06 AM (9 years, 4 months ago)

Greetings sirs,
I have noticed a lot of very very tiny black wasp like flies flying around my cactus room. Are these considered harmful? Anyone else noticed them?
I'm leaving in eastern Europe for the record.


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Far above the Moon, planet Earth is blue and there's nothing i can do

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InvisiblePsiPhi
Stranger

Registered: 04/06/08
Posts: 94
Re: Pest problem? [Re: peyotillo]
    #21006258 - 12/21/14 04:03 AM (9 years, 4 months ago)

Sounds to me like fungus gnats. Do they look like this guy? . If they do then there are a few things you can do to control them

1)Get some yellow sticky traps to hang around your cacti. The gnats are attracted to light and hopefully fly towards it after they emerge from the soil.

2)Add about a 0.635cm to 1.27 centimeter layer(1/4 to 1/2 inch)of coarse sand or perlite to the top and bottom of your pots. Makes it rather hard for them to penetrate the layer in or out.

3)Get a product containing Bacillus thuringiensis israelensis (BTI). The only brand name I know is gnatrol. Or you can get things called Mosquito Dunks which contain the BTI to add to your water that you give the cacti. The BTI destroy the fungus gnat larvae in the soil (Never gone this route myself)

I've only used the first two methods and they're worked well. But if I have a problem with them again I might try the mosquito dunk/BTI method.

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Offlinepeyotillo
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Registered: 07/19/14
Posts: 176
Loc: Yurp
Last seen: 1 year, 10 months
Re: Pest problem? [Re: PsiPhi]
    #21006285 - 12/21/14 04:33 AM (9 years, 4 months ago)

Thank you for your prompt reply.
No, it doesn't look like that. It is a tiny black wasp (i'm certain of it, it looks exactly like a wasp but in miniature, with small antennae, that one has rather elongated wings and antennae). I tried to make a picture but i have a bad camera.


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Far above the Moon, planet Earth is blue and there's nothing i can do

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InvisiblePsiPhi
Stranger

Registered: 04/06/08
Posts: 94
Re: Pest problem? [Re: peyotillo]
    #21006289 - 12/21/14 04:36 AM (9 years, 4 months ago)

Quote:

peyotillo said:
Thank you for your prompt reply.
No, it doesn't look like that. It is a tiny black wasp (i'm certain of it, it looks exactly like a wasp but in miniature, with small antennae, that one has rather elongated wings and antennae). I tried to make a picture but i have a bad camera.




No worries, mate. I shall wait for someone with more of an idea to comment. I'm kinda interested to know what they are too now.

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Offlineintelligentlife
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Registered: 10/18/10
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Re: Pest problem? [Re: PsiPhi]
    #21006490 - 12/21/14 07:06 AM (9 years, 4 months ago)

If I am not wrong totally, you should get rid of them simply allowing all soil in your grow room to go bone dry.

Some flying bugs comes to my plants as well especially during summer when soil is moist most of the time.

Are we talking even same bugs? Some small flying bugs appears usually when it's moist soil and humid and disappear when soil goes dry.

Maybe some pesticides would be ok to use but I suggest to try get predatory bugs. In order to keep predatory bug colony alive and healthy, you need contantly food for them, ie. pests but in control. Similar way nature keep balance... But need to admit it's hard to keep artificial ecosystem running, usually predators die to lack of food when they feed on pests at your cactus plants.

Those what I talk about is called as "banana fly" here. Easy to get rid of By allowing soil surface go dry and avoid organic materials in soil.

Sometimes not all bugs necessary spent time in your garden because of plants, they might have other reason to be there, usually it's pests on plants, but I've noticed not all bugs even pay attention to plants at all, they might do their own work (whatever it is)

How those flying bugs have caused harm to your plants? (it may be easier to help that way)
Scarring, bite marks or some another harm?

Do you keep any potted plants in your garden what have constantly moist soil? (if so they could be those "banana fly" bugs and they disappear by let your soil surface go dry between waterings.

Sometimes in cannabis garden I've seen similar flying small black bugs but they disappear when I let soil surface go dry before watering again. Afaik they don't cause much harm to plants, if plant doesn't have already diseases or something.

Do yo have only cactus garden or lots of different plants in same room? (that may explain those flying bugs if you have containers with constant moist soil..)

Let us know, as well as how much harm those bugs cause.. Sometiems bugs spent time in warm plant grow room just because it's good place to breed, maybe not even using plants as food source.

I just don't know much english names for pests and also because my climate, I don't know all bugs there might be, but I know not every bug in garden cause harm to plants. There are lots of bugs they don't cause harm.

You should show some pictures what kind of damage they cause, or do they even cause damage?

What I've read about describtion of yours, you may have plants along cacti what needs moist soil constantly and those small flying bugs are there as long as there is moist organic soil.

If you don't have any constantly moist soil containers with other plants than cacti. Then they might be something I don't know. Usually these kind of bugs is common in cannabis gardens(what I've read and experienced my self) ...sometimes they appear to moist seedling trays.

Do you see there are several flying bugs at once or just one or two random bugs?

I would not be worried if you don't see any plant receive damage from them. Reason why those are called "banana fly" here is obvious: when you leave bananas rotting to your table, they will come to composing organic material where is moisture as well. With plants those should be easy to get rid of by reduce your watering and let organic soil go dry from surface(or totally bone dry if you have cactus)

I don't know do these what I talk about even like plants or do they just like organic material in moist soil. So far I haven't seen much bugs capable to kill plant(except you give them environment where they can spread to big colony)

Afaik mealybugs is hardest bugs with cactus plants and capable to kill a plant. Also human(like me before) tend to worry so much about bugs they ruin plants with pesticides more than actual pests can every do damage.

I have got always some bugs running in moist soil, they don't fly tho. Anyway, I barely try to get rid of them. Cactus seedlings do fine even few bugs run among them. Actual harm they cause is for cannabis seeds, when seed is germinating, they eat the root and then all inside the seed and kill the plant before it have time to turn in to seedling. For some reason they don't have kill cactus, not even young seedling but they are pain in the ass if tehy are in soil where you try to germinate cannabis seeds, they simply eat the seed from inside when root opens cannabis seed.

Would be still good to know do you have any other plants in your room? plants need constatly moist soil or something? If you have only cactus plants, and no humid seedling trays in here, then it's not those appears to organic soil when it's moist.

They may be fungus gnats, your environment describtion would help actually to diagnose what bugs are capable to live in your room and what doesn't and the we could rule out some bugs and add possibilities what bugs they can be.. Do you see them as big swarm of flying colony or what? moist seedling trays with organic soil may explain those "banana fly" bugs, afaik they should not be harmful to plants and they appear usually to composing organic stuff. They are very small and fly very fast around.

Those banana fly's usually appear very fast to your garden as well as they disappear as fast as they have become. Get everything bone dry will cause them to vanish. And like I said moist seedling trays with organic material may be reason they are there. So far haven't seen what damage they cause and I don't know what kind of plants your cactus room have so I can't say exxactly.. They may be bugs not native to my climate and I may no even know them.:shrug:

IF ya don't see damage anywhere, then don't worry. Feels they are not bugs capable to kill any of your plants. I know smoe bugs what doesn't actually care about plants as food, maybe your environment is just good for them to breed and so on..?

All information of those; damage, how much there are, size, do they fly in colonies or alone or anything would help.


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