Abstract
Chemical thinning consists in spraying the trees with different substances. By the way they act,substances can be: with caustic effects or general and with hormone effects or selective. The generaleffects substances contain the type of substances di – nitro, whose action mechanisms are as follows:when the flowers are open, in the next 10 h after the appliance of the substance, the stigma pollen isdestroyed and thus, the pollination doesn’t take place. Meanwhile, if the substance is used on the flowersthat are not open, it affects the petals, they don’t open anymore and pollination and fecundation doesn’ttake place too. For a proper effect this type of products must be used during the full flowering stage orimmediately after that. Hormonal substances are absorbed directlyinto the fruit or through the leavesand produce abscisia. Hormonal types of products is recommended during rainy periods and in theareas with late falls, when the appropriate time is from the full bloom until the petals fall or the initialperiod of fruit growing.
Published Version
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