Root Rot

Overwatering

To address root rot in avocado trees, it's crucial to ensure proper drainage and avoid overwatering. If the tree is potted, consider repotting it into fresh, well-draining soil and a pot with adequate drainage holes. For trees planted in the ground, improve soil drainage by incorporating organic matter or creating raised beds. Reduce watering frequency, allowing the soil to dry out slightly between waterings. In severe cases, fungicides may be applied, but the focus should be on improving cultural practices to prevent recurrence.

Leaf Burn

Underwatering

To address leaf burn caused by underwatering, it's crucial to establish a consistent watering schedule that keeps the soil moist but not waterlogged. Avocado trees thrive in well-drained soil, so ensure proper drainage to prevent root rot. During dry periods, increase watering frequency, especially for young trees. A deep watering method is recommended to encourage deeper root growth, which helps the tree access water from further below the surface. Mulching around the base can also help retain soil moisture.

Avocado Lace Bug

Pseudacysta perseae

To manage avocado lace bug infestations, it's crucial to start with cultural practices such as ensuring the tree is well-watered and fertilized, as stress can make trees more susceptible. For minor infestations, removing infested leaves may suffice. In cases of severe infestation, applying insecticidal soap or neem oil can be effective. These treatments should be applied thoroughly to the undersides of leaves where the bugs reside. Always follow the product's instructions for the best results. Monitoring the trees regularly for signs of the bugs can help catch future infestations early.

Avocado Root Rot

Phytophthora cinnamomi

Managing avocado root rot requires a multifaceted approach. Firstly, ensure proper drainage as waterlogged soil exacerbates the condition. Applying phosphonate fungicides can help manage the disease by boosting the tree's natural defenses. Additionally, consider grafting susceptible varieties onto rootstocks that are resistant to Phytophthora cinnamomi. Regular monitoring and early intervention are crucial to prevent the spread and severity of the disease.