Bugs destroying Vanda’s flowers - Page 2 - Orchid Board

Clawhammer · #1 11-15-2021, 10:47 AM

Thrips are not hard to eradicate because they are particularly resistant to insecticide, they are difficult to eradicate because they are excellent at hiding, are invisible to the human eye in 4 out of 5 stages of their lifecycle, spend 1 stage in the soil, aren't subject to systemics due to feeding on flowers, and move quickly between plants in greenhouse settings.

Spinosad has been the gold standard in fighting thrips mostly because of the minimal impact on flowers. The brand name Conserve is much more effective than mixes you find in garden centers, but it is also expensive and difficult to source outside the US. Unfortunately thrips have begun to develop a resistance, so it is important to mix insecticides as I explained before.

KikaMaggie · #2 11-30-2021, 08:54 AM

Quote:

Originally Posted by Clawhammer

Thrips are not hard to eradicate because they are particularly resistant to insecticide, they are difficult to eradicate because they are excellent at hiding, are invisible to the human eye in 4 out of 5 stages of their lifecycle, spend 1 stage in the soil, aren't subject to systemics due to feeding on flowers, and move quickly between plants in greenhouse settings.

Spinosad has been the gold standard in fighting thrips mostly because of the minimal impact on flowers. The brand name Conserve is much more effective than mixes you find in garden centers, but it is also expensive and difficult to source outside the US. Unfortunately thrips have begun to develop a resistance, so it is important to mix insecticides as I explained before.

Thank you very much Clawhammer, I’ve used the insecticide mix (haven’t found spinosad) with good results, at least for now. I’ve noticed also that the thips also demaged badly new and fresh roots.Three Vandas were able to bloom, sending the pics. Thank you all.