苹果增产菌对苹果霉心病的防治效果

Effectiveness of PGZCJ in control of apple rot core

于苹果幼芽萌动期、开花前１～２天、坐果期、幼果期、果实迅速膨大期和成熟前期喷施１０００倍液苹果增产菌。经对幼果心室、萼筒分离培养表明：处理后果实心室和萼筒的有害微生物群落比对照少。成熟期和贮藏期调查表明：成熟期霉心病发病率可降低３．０％～１０．０％，病情指数降低６．７％～３３．２％；贮藏１个月后发病率降低１０．０％～２２．３％，病情指数降低１５．６％～４３．３％。

PGZCJ,a n1icrobial agent for increasing apple yield developed by the Plant Ecology En-gineering Institute of Beijin Agricultural University,was sprayed after diluted by 1000 times toapple trees at stages of germinating,1-2days before blossom,fruit setting,fruit developing,rapid enlarging of fruit,or before fruit ripening.Separating culture of the core and calyx at thefruit developing stage showed that the PGZCJ significantly redused the number of harmful mi-crooganisnis.Surveys at fruit ripening and storing revealed that PGZCJ reduced rot core by 3.0-10.0%,with disease index decreased by 6.7-33.2%at fruit ripening;and reduced rot core by10.0-23.3%,with disease index decreased by 15.6-43.3%amonth after storing.