[Objective]The resistance to Tetranychus cinnabarinus(Boisduva)of 84 cassava gemplasms resources from the nursery of Guangxi Institute of Southern Tropical Agricultural Sciences was eraluated.[Method] Thuree random le...[Objective]The resistance to Tetranychus cinnabarinus(Boisduva)of 84 cassava gemplasms resources from the nursery of Guangxi Institute of Southern Tropical Agricultural Sciences was eraluated.[Method] Thuree random leaves were taken from Casiva plants separately from the upper,middle and lower parts,9 leaves from each plant to investigate the damage degree and calculate the mite damage index.[Result]The Tesults showed that among the 84 cassava gemplasms,6 were resistant(R),39 moderately resistant(MR),31 sensitive(S),and 8 highly sensitive(HS)Six germplasms such as Guiken 09-11 and SC5 could be used as breeding materials with resistance,and the vanietics with large planting area in Guangxi such as GR3,SC201,GR911,SC205 and SC11 were all moderately rsistant.The resistance of edible Cassava vanieties was poor,among which GR891 and South Asia Cassava No.1 have the lowest resistance.[Conclusion]No conelation was found between mite damage index of Ca8-sava germplasm and plant type,number of branches,lobe shape,leaf length,leaf width and leaf thicknes.展开更多
基金Sponsored by Major Special Project of Guangxi Provincial Science and Technology Program。
文摘[Objective]The resistance to Tetranychus cinnabarinus(Boisduva)of 84 cassava gemplasms resources from the nursery of Guangxi Institute of Southern Tropical Agricultural Sciences was eraluated.[Method] Thuree random leaves were taken from Casiva plants separately from the upper,middle and lower parts,9 leaves from each plant to investigate the damage degree and calculate the mite damage index.[Result]The Tesults showed that among the 84 cassava gemplasms,6 were resistant(R),39 moderately resistant(MR),31 sensitive(S),and 8 highly sensitive(HS)Six germplasms such as Guiken 09-11 and SC5 could be used as breeding materials with resistance,and the vanietics with large planting area in Guangxi such as GR3,SC201,GR911,SC205 and SC11 were all moderately rsistant.The resistance of edible Cassava vanieties was poor,among which GR891 and South Asia Cassava No.1 have the lowest resistance.[Conclusion]No conelation was found between mite damage index of Ca8-sava germplasm and plant type,number of branches,lobe shape,leaf length,leaf width and leaf thicknes.
