Conditions for the establishment of Persimmons

Persimilis (Phytoseiulus persimilis) is a natural predator used to control spider mites, particularly two-spotted spider mite (Tetranychus urticae), in greenhouses and field crops. For optimal establishment and performance of Persimilis, certain conditions must be met:

1. Temperature

• The best temperature for Persimmilis activity is between 20 and 30 degrees Celsius.
• Their activity decreases at lower temperatures and temperatures above 35 degrees Celsius may cause a severe population decline.

2. Relative humidity

• A relative humidity of 60 to 90 percent is suitable for growth and reproduction.
• At low humidity (less than 50 percent), the activity and survival of Persimmilis decreases, so in dry areas, the humidity of the environment should be regulated by using fogging or other methods.

3. Food source (mites)

• Persimilis is only effective when spider mites (especially eggs and immature stages) are available as a food source.
• In the event of a severe reduction in the mite population, Persimilis may leave the target area in search of food or its population may decrease.

4. Light

• This predator requires sufficient natural or artificial light to be active.
• In greenhouse conditions, the use of an appropriate lighting system is essential on cloudy days or when daylight hours are shortened.

5. How to release

• Persimilis is usually distributed as a predator-containing powder (mixed with bran or carrier material).
• It is recommended to release it evenly in areas where the spider mite population is concentrated.
• The recommended amount is usually 10 to 20 predators per square meter, depending on the severity of the infestation.

6. Ventilation

• Proper ventilation in the greenhouse ensures that humidity and temperature remain within the desired range, but strong air currents may disrupt the even distribution of persimmons.

7. Avoiding pesticides

• The use of chemical pesticides before or after releasing the persimmilis should be controlled, as most pesticides are harmful to this predator.
• If pesticides are needed, use products with least toxicity to natural enemies.

Benefits of using persimmilis

1. Reducing pesticide use and maintaining ecological balance.
2. Effective control of spider mites in sensitive crops such as roses, cucumbers and strawberries.
3. Increased product quality due to reduced damage Pests

Continuous monitoring of greenhouse conditions and mite populations is essential for successful establishment of Persimmons.