Marigold Leafhopper

📖 Description

Marigold Leafhopper (Empoasca flavescens) is an important pest of marigold and many other crops across the Indian subcontinent, particularly severe in the commercial marigold-growing belts of Tamil Nadu, Karnataka, Andhra Pradesh, Telangana, Maharashtra and Madhya Pradesh where India grows over 100,000 hectares of marigold (the world’s largest producer, used for flowers in religious offerings, garlands, natural dye and essential oil extraction). The pest is particularly damaging because (a) its feeding causes ‘hopperburn’ — a characteristic V-shaped yellowing and downward curling of leaf tips and margins that reduces photosynthetic area, (b) it transmits Marigold Phyllody Phytoplasma — a devastating disease that causes virescence (petals turn green and leaf-like) and proliferation (excessive shoot growth from flowers), rendering the plants completely unproductive, (c) the pest has a wide host range allowing populations to persist between marigold crops via weeds and other hosts, and (d) adults and nymphs are highly mobile, jumping and flying away when disturbed, making contact control difficult. The pest is most severe in continuous marigold cropping and in fields with poor weed management. IPM with yellow sticky trap monitoring, biological control (Anagrus egg parasitoid, conservation of native predators), neem-based sprays, and need-based insecticide rotation provides effective and sustainable control. The single most important preventive measure for marigold growers is roguing phytoplasma-infected plants immediately on detection — once a plant is infected, it cannot be cured and serves as a source of phytoplasma for further leafhopper transmission. The pest is a particular concern for organic marigold growers (a growing market segment in India for natural dye and essential oil extraction) because chemical control options are limited and the pest can quickly transmit phytoplasma to many plants before detection.