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Heat Stress / sunburns in orchids -How to identify ,treat and prevent

This probably is one of the most challenges that we growers in the tropics face during the summer. Heat stress is a condition that occurs in orchids and other plants when excessive heat causes an imbalance in transpiration, the process by which moisture evaporates from the plant's tissues signs- 1)pale yellow leaves 2)signs of dehydration like wrinkly,leathery or withered leaves or shrunken pseudobulbs roots may also dry up 3) excess anthocyanin pigment leading to purplish discoloration of the orchid 4) patches of sunburn Treatment (in early stage) or prevention- 1) move orchid to a cooler,shadier place 2) Avoid direct noon sun 3) maintain hydration.. water thoroughly once or twice daily (special attention to the mounted ones) 4)Improve air movement around the plants by putting fans 5)Avoid over fertilizing useful links 1) yellow leaves on orchids what does it means    • Yellow leaves on orchid - what is nor...   2)Infected mini phal    • How to save an orchid (Phalaenopsis) ...   3) infected vanda    • How to save a vanda orchid with rot B...   4)Fusarium wilt in vanda    • Fusarium wilt / Dry rot of vanda orch...   5)why and how to use seaweed extract and epsom salt on orchids    • How to fertilize orchids with seaweed...