Fruit growing
and viticulture of South Russia

Annotation

In the Astrakhan Region in recent years it is very problematicly to receive a big crop of pear fruits due to wide spreading of a pear sucker. The pear sucker is the specific wrecker. Under the conditions of her spreading the yield of pear�s fruits is lost and the trees are damaged also. The trees damaged by a pear sucker have an ugly form and the dry branches. It is established that under the conditions of the Astrakhan Region the high number of larvas of a pear sucker is noted in the period of forming of pear�s fruits and it promotes the essential loss of fruit�s crop. Against a pear sucker the two groups of chemical preparations are applied from the list of the pesticides allowed in the territory of Russia: the organic phosphorus and pyrethroid insecticides. By the experiences we studied the efficiency of application of two insecticides � Fufanon and Decis Profi of different chemical groups, during of sharp increase of pest number. The purpose of work was to determine which preparation possesses the bigger biological efficiency in suppression of the wrecker. Experiments were conducted with a pear of the French breeding of Beret Bosque. The biological efficiency of preparations was determined by decrease of the number of larvas of a pear sucker concerning the control. It is proved that the efficiency of application of an insecticide Fufanon, KE was at the level of 98,3-100% for the period of 21 days, the effect from processing of Decis Profi, VDG was respectively 97,5-100%. It is established that the single treatment of pear's trees of Beret Bosque by insecticides of Fufanon, KE and Decis Profi during vegetation, at the summer period of birth of pear�s sucker promotes the high protection (97,5-100%) of pear�s fruits from damages by a pear sucker.