Healthy poinsettias

BioWorks offers tips for disease production for poinsettias from stock plants, to cuttings to finished plants.

Root disease control
Apply RootShield or RootShield+PLUS to stave off root diseases during poinsettia production.
RootShield controls Fusarium, Pythium, Rhizoctonia,Cylindrocladium and Thielaviopsis, among others. The active ingredient is Trichoderma harzianum strain T-22. Available in granules or a wettable powder, RootShield has a 0-hour REI.
RootShield+PLUS controls Phytophthora, Fusarium, Pythium, Rhizoctonia, Cylindrocladium and Thielaviopsis, among others. The active ingredient of RootShield+PLUS is Trichoderma harzianum strain T-22, PLUS Trichoderma virens strain G-41. It’s available in granule form or as a wettable powder. It has a 0-hour REI unless you use the wettable powder as a dip or dust, which gives it a 4-hour REI.
Both RootShield products reduces or eliminates chemical root fungicide applications. RootShield and RootShield+PLUS can be used in rotation with insecticides, rooting compounds, fertilizers and most fungicides. And there are no phytotoxic effects recorded.

Foliar disease control
To combat foliar diseases, apply Cease or MilStop to prevent fungal and bacterial
diseases.
Cease controls Botrytis, powdery mildew, Erwinia, Xanthomonas and Pseudomonas. The active ingredient is Bacillus subtilis (strain QST 713). It’s available in a liquid formulation and has a 4-hour REI. Cease is also an effective resistance management tool.
MilStop controls Botrytis and powdery mildew, among others. The active ingredient is potassium bicarbonate. It’s available as a soluble powder with a 1-hour REI.
MilStop kills on contact by pulling water from spores and their growing strands. It also inhibits enzymes involved in fungal cell wall formation by altering the pH on the leaf surface.
For timing and rates, click here: