3种防控技术模式对党参根腐病和蛴螬的防控效果及产量的影响OA

To improve the production level and industrial competitiveness of Codonopsis pilosula in Gansu,this study devel-oped 2 GAP-compliant pest and disease management models centered on soil treatment,seedling treatment,and foliar spraying,and compared them with the conventional production model.Results showed that the biological integrated control model,i.e.,soil rotary tillage after broadcasting 1 200.0 kg/ha of Bacillus subtilis granules at 5.0×108 CFU/g and 30.0 kg/ha of Beauveria bassiana wettable powder at 1.5×1010 spores/g,seedling treatment with a 400-fold dilution of 3%kasugamycin-polymyxin suspension,a 100-fold dilu-tion of amino acid water-soluble fertilizer(GGR6),and a 200-fold dilution of Bacillus amyloliquefaciens liquid fertilizer at 1.0×1010 CFU/mL,1 foliar spray of Qitianjian antifreeze agent at 100-fold dilution within 3 d before and after late spring cold events,and two consecutive foliar sprays at 10 d intervals during the initial flowering stage with a 100-fold dilution of amino acid water-soluble fertil-izer(GGR8)plus a 200-fold dilution of twelve-element water-soluble fertilizer,and the green integrated control model,i.e.,soil rotary tillage after broadcasting 1 200.0 kg/ha of Bacillus subtilis granules at 5.0×108 CFU/g and 90.0 kg/ha of 3%phoxim granules,seed-ling treatment with a 1 500-fold dilution of 25%pyraclostrobin suspension and a 1 000-fold dilution of 3%metalaxyl-hymexazol aqueous solution,1 foliar spray of Qitianjian antifreeze agent at 100-fold dilution within 3 d before and after late spring cold events,and 2 consecutive foliar sprays at 10 d intervals during the initial flowering stage with a 100-fold dilution of amino acid water-soluble fertilizer(GGR8),a 200-fold dilution of twelve-element water-soluble fertilizer,and a 1 000-fold dilution of 25%propiconazole EC,significantly increased emergence rate by 14.52%and 10.13%,respectively,compared with the production model without control mea-sures,and advanced emergence by 1 to 2 d.Both models showed good efficacy against root rot of C.pilosula,with control effects of 37.97%and 27.55%,respectively,significantly higher than that of the conventional production model,i.e.,broadcast application of 90.0 kg/ha of 3%phoxim granules to the soil,transplanting after rotary tillage,2 sprays of 500-fold diluted potassium dihydrogen phos-phate after late spring cold injury,and 2 consecutive sprays of 100-fold diluted Zhuanggenling at the initial flowering stage.Among them,the biological integrated control model showed the highest efficacy against white grubs,reaching 60.78%,significantly outper-forming the other treatments.Comprehensive evaluation indicated that the biological integrated control model performed particularly well in seedling protection and promotion,disease and insect control,yield improvement,and value enhancement in C.pilosula produc-tion,and therefore has strong potential for wide application in agricultural practice.