thrips on Amazon lily (Eucharis)
I care for the plants at the local library as a volunteer. For some time I've been struggling to rid this plant of thrips. Last year I brought the plant home, so I could spray it on a regular basis. I used Safer's Endall, a pyrethrum based product. Then I re-potted the bulbs in fresh potting mix. For awhile I didn't see any sign of the bugs, but now they are starting up again.
I could just scrap the plant, but I hate to be defeated and it is a lovely plant. Before I abused it last summer, it was blooming regularly. The concern is that untreated, this infestation spreads to some of the other plants.
The library is a big bright airy place and the plants thrive and give a tropical feel to the space.
Can anyone give me suggestions on what to try next? Thanks.