| 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°C 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 |
|