Research On Resistant Of Several Ribes To Aphids

The ribes belongs to Saxifragraceae and is a kind of fallen leaf shrub.It is small wild bacca resource.The whole world has about 160 kinds,scatter mainly in river valley,edge of forest and shrubbery in north temperate belt.But for various reasons,the wild ribes plant's quantity is reducing year by year.And the distribution area is also gradually reducing.In overseas,the individual kind cultivated widely.The fruit is small berry resources which full of nutrition and contains rich protein,amino and mineral substance.It can be used to make drink and the wine.Simultaneously,ribes plant is also being used as landscaping tree.It has the huge economic value and the remarkable ecological valueOur country is in the center of ribes plants modern distribution area.There are 59 kinds and 30 variations in northeast,northwest,southwest and so on areas,which are wild but not cultural in nature.And Ribes mandshricum is outstanding in quantity and value.The experiment takes the R.diaicantha,R.pauciflorum,R.manshuricum,Ribes odoratum,and R. komarovii,the five ribes as the object of study to determine the leaf blowhole density,the content of soluble sugar,the content of soluble protein,the content of lignin and amino acid.The quantity of wintering egg, population dynamic of aphids and development phase f nymphae are investigated.The correlation between chemical date of Ribes plants and the resistance to aphids is evaluated.The conclusion was obtained as below.1.The comparison of Ribes plants resistance to aphids:R.diaicantha＞R.pauciflorum＞R.manshuricum＞Ribes odoratum＞R.komarovii2.There is significant correlation between the leaf blade blowhole density of Ribes and the resistance to aphis.The type with more blowhole number in unit area is more infective to the aphis and less type with unit area blowhole number is more resistant to aphis.R.diaicantha