硫酸铜对柑橘和山麦冬炭疽病菌的影响

在PDA培养基培养条件下,研究不同浓度的CuSO4对柑橘炭疽病菌和山麦冬炭疽病菌生长状况、产孢量、孢子萌发率的影响。试验结果表明,与对照组相比,1 g/200mL CuSO4 5H2O对柑橘炭疽病菌和山麦冬炭疽病菌的影响最大,完全抑制了这两种病菌的生长和产孢;0.2 g/200mL CuSO4 5H2O对柑橘炭疽病菌和山麦冬炭疽病菌的影响也非常明显,不仅较大程度地抑制了这两种病菌的生长和产孢,而且使这两种孢子的萌发率均低于19%;0.1 g/200mL CuSO4 5H2O对柑橘炭疽病菌和山麦冬炭疽病菌的影响较大;0.02 g/mL CuSO4 5H2O对柑橘炭疽病菌和山麦冬炭疽病菌的影响较小。由此可以初步得出,0.2 g/200mL CuSO4 5H2O对柑橘炭疽病菌和山麦冬炭疽病菌的抑制效果显著,可以作为抑制这两种病菌的临界浓度。

Influences of Copper Sulfate on Colletotrichum sp. from Citrus and Liriopes Radix Liriopes

In the condition of PDA cultural medium,the influences of copper sulfate at different concentrations on the growth,spore production and spore germination of Colletotrichum sp.from citrus and Radix liriopes were studied.The results showed that compared to the control,the most influence was from the 1 g/200 mL CuSO4.5H2O which inhibited the growth and spore production drastically,and the growth and spore production of two pathogens are not only affected obviously but also to less 19% spore germination rate by 0.2 g/200 mL CuSO4.5H2O,and the more influence was exhibited by 0.1 g/200 mL CuSO4.5H2O,and the trivial influence from 0.02 g/200 mL CuSO4.5H2O.In conclusion,because of significant inhibiting effect on Colletotrichum sp.from citrus and Radix liriopes,CuSO4.5H2O with 0.2 g/200 mL could be regarded as the critical concentration which was able to inhibit the growth of two pathogens primarily.