What are the chemicals that mitigate the drought stress in crop plants upon spraying? Also suggests suitable concentration for spraying.
well few of them are glycine betaine, salicyclic acid, thio urea and even micro organisms such as PPFM.
However response varies greatly with crops and also site-specific.
The concentration varies with chemicals .Generally from 0.1-1-2 % over varied crops and sites.Specifically you can search literature pertaining to a particular chemical.
I agree with Singh's answer, glycine betaine, salicyclic acid, thio urea
can mitigate the drought stress in crop plants upon spraying.
You can also use BAP, NAA, foliar calcium, PGRs ... to mitigate the drought stress.
You can use phytohormone ABA for foliar application by using very dilute concentration in the range of 0.1 umolar to mediate the effects of mild droughts as reported by Valluru et al., 2016. Paper is attached below. Similarly low molecular weight osmolytes, as glycinebetaine, proline and other amino acids, organic acids, polyols and PGPRs also helps to mitigate drought.
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