Common hop

Common hop (Latin: Humulus lupulus L.) is a perennial herbaceous climbing plant belonging to the Cannabaceae family. In agriculture, it is primarily cultivated for its female inflorescences, known as cones, which contain lupulin glands rich in essential oils and bitter acids, vital for the brewing and pharmaceutical industries.

Originating from the temperate regions of the Northern Hemisphere, this plant has spread across Europe, Asia, and North America. It thrives in moderate climates where distinct seasonal changes allow the plant to undergo a dormant phase, ensuring the regeneration of its extensive perennial root system each spring.

The plant exhibits vigorous growth, with vines capable of reaching heights of 6–8 meters in a single season. It is a dioecious species, meaning male and female flowers are borne on separate plants. Only the female plants are commercially grown, as they produce the seedless cones required for consistent flavor profiles in industrial processing.

Hops are highly demanding regarding soil fertility, requiring deep, well-drained, and nutrient-rich soils with a neutral pH. Proper irrigation is essential, as the plant is highly sensitive to moisture stress. Trellis support systems are mandatory for production, facilitating maximum leaf surface exposure to sunlight and efficient air circulation, which helps mitigate moisture-related diseases.

Agronomic management must address significant pathological threats and insect infestations. Known diseases include:

• Alternaria blight, anthracnose, and verticillium wilt.
• Sclerotinia, gray mold (botrytis), and downy mildew.
• Maize dwarf mosaic virus and nematode infestations.