Mango

1. Powdery mildew – Oidium mangiferae (Fungus) Loss up to 30–90%
2. Anthracnose – Colletotrichum gloeosporioides (Fungus)
3. Canker – Xanthomonas campestris pv. mangiferaeindicae (Bacteria)
4. Rust – Cephaleuros mycoidea (Alga)

Banana

1. Panama wilt – Fusarium oxysporum f.sp. cubense (Fungus). Common in acidic soils
2. Sigatoka leaf spot – Cercospora musae (Fungus)
3. Bunchy top – Banana Bunchy Top Virus (BBTV). Transmitted by aphids
4. Moko disease – Ralstonia solanacearum (Bacteria)

Citrus

1. Gummosis – Phytophthora spp. (Fungus)
2. Bacterial canker – Xanthomonas campestris pv. citri (Bacteria)
3. Tristeza – Citrus Tristeza Virus (CTV). Detected using acid lime
4. Greening – MLOs (Mycoplasma-like organisms). Transmitted by citrus psylla

Guava

1. Guava canker – Pestalotiopsis psidii (Fungus)
2. Guava wilt – Fusarium oxysporum f.sp. psidii (Fungus). Common in alkaline soil. Resistant variety: Allahabad Safeda

Grape

1. Downy mildew – Plasmopara viticola (Fungus)
2. Powdery mildew – Uncinula necator (Fungus)
3. Pierce’s disease – Xylella fastidiosa (Bacteria) Use resistant rootstock (e.g., Temple)

Fig rust – Cerotelium fici (Fungus)

Pineapple; Wilt – Virus. Transmitted by mealybugs and lacewing insects

Papaya

1. Damping off – Pythium aphanidermatum (Fungus)
2. Ring spot – Papaya Ring Spot Virus (PRSV). Transmitted by aphids
3. Leaf curl – Virus. Transmitted by whitefly

Apple

1. Crown gall – Agrobacterium tumefaciens (Bacteria)
2. Fire blight – Erwinia amylovora (Bacteria)
3. Apple scab – Venturia inaequalis (Fungus). Up to 80% yield loss

Coconut

1. Root wilt – MLOs. Transmitted by lace bug
2. Basal end rot – Ganoderma lucidum (Fungus)

Arecanut

1. Mahali/Koleroga – Phytophthora arecae (Fungus). Vector: spindle bug
2. Bud rot/Anabe roga – Ganoderma lucidum (Fungus)

Coffee

• Leaf rust – Hemileia vastatrix (Fungus). Introduced from Sri Lanka. Resistant variety: Coffea liberica