What's this infestation? On Thornless Honeylocust - Gleditsia triacanthos var. inermis.

[Low Altitude]

The Bifenthrin counterattack on the invasion of thrips and spider mites is underway. I have now applied one dose to all the affected houseplants, plus, 'prophylactically', to others, on the presumption that they are vulnerable to infection. FWIW I have mostly applied the Bifen by immersion of potted plants, and at a concentration of 0.04%.

Let's see what happens.

How long should i wait until giving a second dose? Once every few waterings? Once or twice a year (growing season)?

 

[Chuck]

The Bifenthrin counterattack on the invasion of thrips and spider mites is underway. I have now applied one dose to all the affected houseplants, plus, 'prophylactically', to others, on the presumption that they are vulnerable to infection. FWIW I have mostly applied the Bifen by immersion of potted plants, and at a concentration of 0.04%.

Let's see what happens.

How long should i wait until giving a second dose? Once every few waterings? Once or twice a year (growing season)?

I would do it once every 7 - 10 days in order to disrupt their reproductive cycle and keep doing it until there is zero sign of them and then every couple of months prophylactically.

 

[Low Altitude]

Oh that's good to know, Chuck, thanks. In my ignorance, i was afraid of overdoing it, and damaging the plants. 70-10 days will be a handy alternate watering for most of them, then with a 1-in-4 after the bugs seem gone. Many thanks.

 

[Low Altitude]

I would do it once every 7 - 10 days in order to disrupt their reproductive cycle and keep doing it until there is zero sign of them and then every couple of months prophylactically.

Chuck,
A year on and all my houseplants thank you for the bifenthrin tip. It is effective, to be sure – and necessary: the mites are still lurking – I think. I have been re-propagating some 'false' gloxinia, sinningia speciosa, and maybe I was slow to give them bifenthrin. The 'blight' looks a bit different from the way it manifested on the honeylocusts and the pepper plant: the spots are brown not white, and so far, no visible spider mites or their webs – maybe, just, because I did dose in time with the bifenthrin. What do you think from the photo?

 

[Chuck]

Chuck,
A year on and all my houseplants thank you for the bifenthrin tip. It is effective, to be sure – and necessary: the mites are still lurking – I think. I have been re-propagating some 'false' gloxinia, sinningia speciosa, and maybe I was slow to give them bifenthrin. The 'blight' looks a bit different from the way it manifested on the honeylocusts and the pepper plant: the spots are brown not white, and so far, no visible spider mites or their webs – maybe, just, because I did dose in time with the bifenthrin. What do you think from the photo?

I think it is time for another application

 

[Low Altitude]

Gothcha. On it, thanks!