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2

These silvery gray mobile larvae and flying adults are most likely to be fungus gnats. As you have found successful control can be accomplished with: drying out the top of the soil Yellow sticky traps an application of one liter of water and 5 ml of 5 bleach or chlorine, wait a few minutes, followed by more water to wash the chlorine out also works but is ...


2

The problem with a large tree like this is that trying to spray it requires professional equipment. Even with a pressurized sprayer you will get whatever you are spraying drifting onto to neighbors or public property. In North America you would be opening yourself up for possible legal action by doing this. As you will not get complete coverage and scale ...


0

It is truly a beautiful plant! Get NEEM...this works very well and is pretty safe. Spray it at night so as not to hurt bees...just in case. Neem works very well with scale! You might have to do it every other week. Rent a sprayer or buy a cheapie 2gal pump sprayer. Spray the trunk, limbs and definitely under the leaves. This works very well and safely. ...


2

That picture is of a cycad plant and it has a minor infestation of scale. Provide good drainage for the plant so it doesn't sit in water. .The pot should have drainage holes Scale can be controlled with soap and water but it takes diligence and repeated applications so you can catch the juveniles after they hatch. See here for more details


5

Most likely a form of red spider mite, although these prefer hot, dry conditions, and you say you're growing hydroponically; this often means moist air, although not necessarily. Assuming it is spider mite, neem oil in a spray should do the trick, but it would be best to spray only one plant, or a few leaves, to see how the plant responds to the treatment. ...



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