• Morphology of Cercospora cucurbiticola:
• Statement (I) is false: Cercospora mycelium is largely internal, and descriptions vary; however, statement II is unequivocally false because Cercospora species produce conidiophores grouped in fascicles on an internal stroma without sterile setae.
• Statement (II) is false: Needle-like sterile setae are characteristic of the genus Colletotrichum (acervulus), NOT Cercospora.
• Conclusion: Both Statement (I) and Statement (II) are false (Option 2).

Correct option: (2) Both Statement (I) and Statement (II) are false.

• Conidial Morphology in Powdery Mildew Genera (Erysiphaceae):
• Phyllactinia corylea (Phyllactinia guttata): An endophytic/ectophytic powdery mildew of deciduous trees (mulberry, hazelnut, oak). It produces unique, massive, solitary clavate (club-shaped or rhomboid) conidia on conidiophores that arise from internal hyphae through stomata with a bulbous basal swelling.
• Other Genera:
• Leveillula taurica: Produces dimorphic conidia (first-formed lanceolate, subsequent cylindrical).
• Uncinula necator & Podosphaera: Produce doliiform or cylindrical conidia in chains.
• Conclusion: Phyllactinia corylea has clavate type conidia (Option 2).

Correct option: (2) Phyllactinia corylea

• Diseases Caused by Phytophthora citrophthora:
• Citrus Gummosis (Foot Rot / Collar Rot): Caused primarily by Phytophthora citrophthora (and P. nicotianae var. parasitica).
• Symptoms: The pathogen attacks the bark near the soil line, causing water-soaking, brown rotting of the cambium, longitudinal bark cracking, and profuse exudation of dark amber-colored gum (gummosis), girdling the trunk and causing tree decline.
• Other Diseases: Mahali / Koleroga of arecanut is caused by Phytophthora meadii / P. heveae.
• Conclusion: Phytophthora citrophthora causes Gummosis (Option 3).

Correct option: (3) Gummosis