I wonder if someone experienced changing the sex ratio in tree crops specifically for increasing female flowers.
I am fully believe that, that sex ratio mostly genetically and environmentally controlled. We can modify it in some crops by using the PGRs.
Sir, changing of sex ratio for getting of higher female flowers especially in vegetables we use to recommend foliar spray with Boron @ 2g/litre of water sir.
This question has been addressed vis studies conducted on cuccumber. Application of Ethephon, an ethylene realising compoind in reasrs the proportion of female flowers.
Another important aspect is the genetic control of flowering. In papaya, for example, we have three kinds of flowers: male, female, and hermaphrodite. To reduce the male flowers ratio in the field, we use only genotypes produces from hermaphrodite flowers. The genetic control possibilities them. I recommend that you read about this, maybe it will help in your work.
In castor, we are recommend light irrigation with some amount of fertilizer for controlling male flower in pistillate line. It is differ from crop to crop
In cucumber for induce male flower, we are using growth regulator
So review and probably PGR give you response
Sex ratio of the flowers can be regualted with the help of spraying certain PGRs or chemicals like Ethephon but success is limited to specific crop species. It is not applicable for each and every crops.
Mostly ethephone is used to induce female flower production in many crops. However, temperature also play some role in changing the sex expression in papaya.
Sex ratio controlled by genetics and environment. We can modify it in some crops by using the Plant Growth Regulators
Asjad Ali
In general Plant growth regulators are used. To increase the female flowers, in general Ethylene (Ethrel) is used....Apart from this 2,4 D, GA3 can also be used in specific concentration.
Asjad Ali I saw you were requesting a papaya link. I just read a papaya flowering patterns. Attached to share with you. Hope that it is helpful to you.
I came across some articles saying that induction of silver nitrate is useful to induce hermaphrodite...However, silver nitrate itself is strong oxidizing reagent in which you need to take extra care on the concentrations you are going to test with...
In plant tissue culture, the nutrient media get oxidized and brown easily when it is supplemented with silver nitrate at high concentrations...
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