Non flowering annuals

Question

I have a commercial pest control company spray my house for bug/pest control.

This summer, my usually abundant with blossoms geraniums have virtually stopped blooming.
A black eyed Susan vine that is typically loaded with blossoms at this time of the year has hardly any. and they look puny.

Both of these mentioned plants have very LUSH greenery.

Can the pest control chemicals be causing these factors of high greenery/low blossoming?

I became especially suspicious of this cause, one day just after the spraying had occurred when one half of a heavily blossomed knock out rose bush, looked pale and curled up. That side was near a corner of the house which would have received apray.

Answer 1

I am not sure what specific chemicals the pest control company would have used, but there are many insecticides that can harm plants; this is known as phytotoxicity. Your observation of the rose bush curling up does especially sound like chemical damage. This article explains the problem:

http://landscapeipm.tamu.edu/types-of-pest-control/chemical-control/phytotoxicity/

This article deals with herbicides, not insecticides, but most of the information also applies:

https://www.gardeningknowhow.com/plant-problems/environmental/herbicide-plant-damage.htm

The perennial plants should recover over time, probably by next year. This article has some advice on how to care for damaged or stressed plants:

https://www.gardeningknowhow.com/plant-problems/environmental/care-of-damaged-plants.htm