F1 Vincent 2 Choice

Crop Name	Ornamental Sunflower
Hybrid Name	Vincent 2 Choice
Plant Habit	Semi-tall plant with excellent branching and flower setting.
Maturity Period	42–45 days after transplanting
Flower Characteristics	Attractive flowers with orange-coloured florets and a black centre.
Flower Diameter	11–13 cm
Other Characteristics	Good vase life of 10–12 days and market acceptance. Suitable for long transportation.

Parameter

Description

Scientific Name

Helianthus annus

Hybrid

F1 Vincent’s 2 Choice

Soil

Sandy loamy to deep clay with good drainage; pH 6.5–7.5

Climate

Optimal temperature: 25–35°C

Season

Throughout the year except snowfall in North India

Spacing

20 × 20 cm / 30 × 30 cm, sow seeds at 0.5–1 inch depth

Seed Rate

3.5–4 kg/acre (approximately 50,000 seeds/acre)

Fertilizers & Manures

FYM @ 10,000 kg/acre + Vermicompost @ 1,000 kg/acre (mix with soil 2 weeks prior to sowing)
19:19:19 NPK – 4 g/plant, weekly once during crop growth stage

Irrigation

Once in a week depending on soil moisture

Weeding

Timely weeding is important to raise a good sunflower crop

Diseases

Name of Disease	Symptoms & Management
Alternaria Blight (Alternaria helianthi)	Dark brown to black circular or oval spots (0.2–5 cm) with concentric rings and necrotic chlorotic zones. Spots first appear on lower leaves and later spread to petioles, stem and ray florets. Control: Foliar spray with 0.3% Mancozeb, four times at 10-day intervals.
Rust (Puccinia helianthi)	Uredo pustules appear first on lower leaves and later spread to stems, petioles, floral bracts and petals. May cause up to 40% yield loss. Control: Spray Mancozeb @ 1000 g/ha.
Downy Mildew (Plasmopara halstedii)	Plants become severely stunted with chlorotic, thick, downward-curled leaves. Angular greenish-yellow lesions appear; fungal growth visible on lower leaf surface. Control: Cymoxanil 8% + Mancozeb 64% WP (2 g/L), Fenamidone 10% + Mancozeb 50% (w/w).

Pests

Pest	Symptoms & Management
Capitulum Borer (Helicoverpa armigera)	Larvae feed on leaves initially and later bore into the head (capitulum). Control: Sow 3–4 border rows of maize or jowar; use marigold as trap crop (50 plants/acre).
Leaf Hopper (Amrasca biguttula biguttula)	Adults and nymphs suck sap causing pale yellow leaves that curl inward; leaf edges turn pinkish brown. Control: Spray Imidacloprid 17.8% SL @ 100 ml/ha.
Bihar Hairy Caterpillar (Spilosoma obliqua)	Larvae feed gregariously on underside of leaves causing severe defoliation. Control: Summer ploughing, use well-rotted manure, collect & destroy larvae; spray Phosalone 35 EC @ 1000 ml/ha.
Tobacco Caterpillar (Spodoptera litura)	Larvae feed on tender leaves, shoots, bracts and petals causing heavy defoliation. Control: Hand pick larvae; spray Dichlorvos 76 EC @ 500 ml/ha or Phosalone 35 EC @ 1000 ml/ha.

Maturity

Flowers ready for harvest in 50–55 days (¼ flower open stage)

Yield

1 flower/stem (11 flowers/m²)

No description

F1 Vincent 2 Choice

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