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White spider: what it is, how it originates, and how to eliminate it effectively
White Spider
Polyphagotarsonemus Latu
Pathogen:
Insect
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
The white mite, also known as Polyphagotarsonemus latus, is a small mite that belongs to the Tarsonemidae family. This pathogen is especially problematic in agriculture, as it attacks a wide range of crops, including cannabis. White mites are difficult to detect with the naked eye due to their small size, making them difficult to control once they have established themselves in a plantation.
SYMPTOMS
In cannabis, the white mite can cause a disease known as acariasis. Symptoms include yellow or silver Taches on the leaves, deformation of the shoots, necrosis at the tips of the leaves, and a generally unhealthy appearance of the plant. Additionally, mites can spin fine webs on leaves and shoots, indicating a severe infestation.
TEMPERATURE AND HUMIDITY
25°C - 30°C
60% - 70%
HOW IS IT SPREAD?
Direct contact, transport of plant material, contaminated agricultural equipment, previous infestation in the soil.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• RAPE OIL 82.53% + PYRETHRINS 0.459% [EC] P/V
• ORANGE OIL 60g/L [ME] P/S
• PARAFFIN OIL (CAS [97862-82-3]) 40% [EW] P/V
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• SULFUR 80% [DP] P/P
• LAMBDA CYHALOTHRIN 10% [CS] P/V
• MALTODEXTRIN 47.6% [SL] P/V
• POTASSIUM SALTS OF FATTY ACIDS C14-C20 48% [EW] P/V
• SPIROTETRAMAT 10% [SC] P/V
• TAU-FLUVALINATE 24% [EW] P/V
• DIATOMAEAN EARTH 100% [CP] P/P
Treatments allowed in organic farming
• RAPE OIL 82.53% + PYRETHRINS 0.459% [EC] P/V
• ORANGE OIL 60g/L [ME] P/S
• PARAFFIN OIL (CAS [97862-82-3]) 40% [EW] P/V
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• SULFUR 80% [DP] P/P
• LAMBDA CYHALOTHRIN 10% [CS] P/V
• MALTODEXTRIN 47.6% [SL] P/V
• POTASSIUM SALTS OF FATTY ACIDS C14-C20 48% [EW] P/V
• DIATOMAEAN EARTH 100% [CP] P/P
Insect allies
PREDATORY MITES
LADYBUGS
LACEWINGS
PARASITIC WASPS
HOVERFLIES OR PARASITIC FLIES
PREDATORY BUGS
There are no natural allies
Mycodiplosis oidii (predatory mosquito)
EFFECTIVE PRODUCTS TO ELIMINATE THIS DISEASE
To prevent and control white mite in cannabis crops, it is recommended to implement integrated pest management practices. This includes regularly inspecting plants for early signs of infestation, removing weeds and plant debris, applying natural predators such as predatory mites and using specific plant protection products where necessary.
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