1.

Write the protected cultivation of chrysanthemum with respect to soil and climate, varieties, major insects-pests and diseases.

Answer»

Climate: Cut chrysanthemums are grown under polyhouses with the following environmental conditions.

Temperature : 16 - 25°

Relative humidity : 70 - 85 % 

CO2 : 600 - 900 ppm

Photoperiod : Long day conditions with 13 hours light & 11 hours darkness during vegetative stage (upto 4-5 weeks from planting) and short day conditions with 10 hours light & 14 hours darkness during flower bud initiation stage.

Soil : Well drained sandy loam soil with good texture and aeration or growing medium made of 1: 1: 2 of soil, compost and cocopeat with pH of 5.5 to 6.5.

Varieties:

Standard types: Bonfire Orange, Bonfire Yellow

Spray types: Reagan Yellow, Reagan White, Nanako 

Insect pests: Leaf miner, Thrips, Aphids, Red spider mite 

Diseases : Leaf spot, White Rust, Wilt, Powdery mildew



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