Phytophthora
Citrus Decay Or Brown Rot
Phytophthora Sp.
Pathogen:
Oomycete
Type:
Risk to the plant:
HIGH
DESCRIPTION
WHO CAUSES IT?
Phytophthora is a genus of fungi that includes several phytopathogenic species known to cause diseases in a variety of plants, including citrus. These fungi can survive in soil and water, infecting plant roots and causing them to rot. Phytophthora infection can spread to other parts of the plant, such as the stem, seriously affecting its health and production.
SYMPTOMS
Phytophthora spp. It causes a disease known as citrus watering, which manifests itself as rot of the roots and, in severe cases, of the base of the stem. This causes the death of the roots and, consequently, a general weakening of the plant. Symptoms may include a darkening and softening of the roots and stem, as well as dieback of branches and leaves.
• Root rot.
• Weakening and regressive death of branches and leaves.
• Darkening and softening of the base of the stem.
• Loss of general vigor of the plant.
• Reduction in fruit production.
TEMPERATURE AND HUMIDITY
15°C - 30°C
60% - 90%
HOW IS IT SPREAD?
Contaminated water, infected soil, contaminated agricultural tools.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• FOSETIL-AL 80% [WG] P/P
• CUPRIC HYDROXIDE 13.6% (EXPR. IN CU) + COPPER OXYCHLORIDE 13.6% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 35% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 37.5% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 70% [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
Authorized treatments in organic farming
• CUPRIC HYDROXIDE 13.6% (EXPR. IN CU) + COPPER OXYCHLORIDE 13.6% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 35% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 37.5% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 70% [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
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
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• Avoid waterlogging and maintain good soil drainage.
• Use of Phytophthora-resistant rootstocks.
• Apply specific fungicides when necessary.
• Prune and remove infected parts of the plant.
• Rotate crops to reduce the accumulation of pathogens in the soil.
Recommendations
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