Pogodna svojstva tla i optimalni ekološki uvjeti nisu dostatni za uspješnu proizvodnju kruške. Ograničavajući čimbenici su: klimatski, odabir sortimenta, odabir podloge, te vrste i brojnost kukaca oprašivača. Pri podizanju nasada kruške zanemaruje se problem oprašivanja kukcima, jer vlada uvjerenje da će krušku oprašiti pčele medarice (Apis mellifera). Voćari moraju razmišljati i o uporabi drugih kukaca: bumbara (Bombus spp.) i solitarnih pčela iz roda Osmia (Osmia rufa i Osmia cornuta), jer od uspjeha oprašivanja ovisi ne samo krupnoća ploda već i prirod. U novije vrijeme svjedoci smo i primjene hormonskih pripravaka za oprašivanje voćaka.Proper characteristics of soil and optimal ecological conditions are not enough for successful pear production. Restrictive factors are climate, sort selection, foundation selection, sort and number of pollinators. When establishing a pear plantation, people neglect the problem of insects\u27 pollination for believe that honeybees will pollinate pears (Apis mellifeara). Fruit producers have to think of other insects usage: bumblebees (Bombus spp.) and solitary bees from Osmia genus (Osmia rufa and Osmia cornuta). Yield and size of the fruit depend on the success of pollination. Lately we witnesses of hormone preparation treatment for pollination
