PatArizona

G’day Tallone…

You’re original question, “…Insecticides…should these only be applied when pests are noticed?...” prompted some interesting responses…

Example…”… No. Periodic application is good as a preventative measure…”.

That followed by a rather lengthy dissertation by Redhawk, on preventative application of insecticides…and fungicides…and mitecides…every 4-6 weeks. At least Nine to eleven times a year?? Apparently, they really dooo do things big in Texas.

Redhawk made a point “…to name a few problems when growing bonsai down here in South Texas…”.

South Texas…hmmmm. Never tried bonsai in South Texas. Southern Arizona, yes…but that isn’t South Texas, is it?

So, preventative application of “cides” is what works for Redhawk…in South Texas.

However…I take a different stand…the following is what works for me…

INDISCRIMINATE USE OF INSECTICIDES

Always remember, and don’t ever forget, that indiscriminate use of insecticides…or any “cide” of any description…is a very, very bad thing. Any time that you use an insecticide, you are likely to nail some beneficial insects
and predator insects in addition any harmful critters you might get.

So, what to do, you ask…

Well, you should conclusively identify the critter you are after…whatever it takes, identify the culprit. Then, and only then, treat your plants, soil, etc., for that specific pest. If necessary, take samples of the pest, damaged plant, infested soil, etc., to a qualified local nurseryman, and or your local Agriculture Extension Agent (or whatever your government agency happens to be) to get help identifying your pest.

Once you have accomplished identification, you should start treatment with the least toxic method (spray with clear water, whatever) recommended for your particular problem. If the “least toxic” doesn’t work, move on to the next “least toxic”, etc. And, always read the label! Not only read it, but follow the directions!

What about preventative treatment…you ask.

“Preventative” treatment is not my bag. For me, there’s no joy in killing insects. The bug executioner does not live here. I have found that when I keep my bonsai area clean, clear of trimmings, etc., and provide good care, I have no need of insecticides. In fact, about 3 months back, I discarded 6 or so, insecticides/fungicides that had not been used in 5-10 years. Also, you must keep your landscaping pest free.

Keep in mind that “cides” should never be used in any way that is not specified on the label. If you are not following label directions…here in the USA anyway…you are breaking the law. Also, there may very well be a health risk if you disregard the label instructions.

Finally, what I have suggested (that’s suggested as in “suggested”) above, is what has worked for me, in Southern Arizona for almost 13 years, and in Northern California before that…and now, back home in Northern California.

I know that I’m being redundant, but it works for me.

So, you've read what works for Redhawk, and you've red what works for this Ol' Sage. The choice is yours.

Whatever floats your boat...

Pat

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BONSAI isn't about surviving in a storm, rather, how to dance in the rain.
THE ONLY WAY: Always remember, and don't ever forget, that whatever you read here is not cast in concrete... the intent of any advice is to help. In no way should you feel that I’m saying that my way is the only way…heaven forbid! I've seen far too much of the "my way or the highway" attitude in bonsai as well as in other areas of life.