How to prepare a Fitoverm solution for spider mites? - briefly
Mix Fitoverm concentrate at 1 ml per liter of water, add 0.1 % non‑ionic surfactant, and spray thoroughly onto the leaf undersides until wet. Reapply every 5–7 days while spider‑mite activity persists.
How to prepare a Fitoverm solution for spider mites? - in detail
Fitoverm is a horticultural oil formulated to suppress spider mite populations. Effective use requires precise dilution, thorough mixing, and proper application timing.
Begin by reviewing the product label to determine the recommended concentration for mite control, typically expressed as milliliters of concentrate per liter of water. Measure the required amount of concentrate with a calibrated graduated cylinder or syringe to avoid dosing errors.
Fill a clean spray tank with the desired volume of lukewarm water. Add the measured Fitoverm concentrate to the water while stirring continuously. Stirring should continue for at least one minute to ensure complete emulsification; the solution must appear homogenous, without visible oil droplets.
Verify the final concentration with a calibrated refractometer or dip‑test kit if available. Adjust the mixture by adding water or concentrate to match the target rate precisely.
Before field application, conduct a leaf‑burn test on a single plant leaf. Apply a small amount of the solution to a 5 cm × 5 cm area, wait 24 hours, and inspect for discoloration or phytotoxicity. If adverse effects appear, reduce the concentration by 10–20 % and repeat the test.
When the solution passes the leaf‑burn test, load the spray tank and calibrate the nozzle to deliver a fine, even mist. Apply the mixture to the foliage until runoff occurs, covering both upper and lower leaf surfaces where spider mites reside. Early morning or late afternoon application minimizes rapid evaporation and maximizes oil uptake.
After application, avoid watering or heavy rain for at least six hours to allow the oil to adhere to the mite’s cuticle. Repeat treatments at 7‑ to 10‑day intervals, monitoring mite populations with a hand lens. Discontinue use if beneficial insects show signs of distress, adjusting the schedule accordingly.
Dispose of any leftover solution according to local hazardous‑waste regulations. Clean equipment thoroughly with detergent and rinse with clean water to prevent residue buildup. Regular maintenance of the spray system ensures consistent performance in subsequent applications.