Its characters are following: the color of pro-thorax and met thorax is brown, the color of abdomen is black, the length of body is 2.25~4.4mm, the mean ratio of parasitism is 42.59% in 19℃, the mean number of adult is 20.96.Sderoderma sichuanensis Xiao are used to against the larva of Clytus validus Fairmaire.
Under an optical microscope, the diameter of the hypha is 2.0 to 3.0 μm, the sporangia is black and ball shaped which is 40.0 to 45.0 at the diameter and there are marry spores balls is a sporidia, and the length of the spore ball diameter is 9.0 to 11.0 μm.
The infection process of the pathogenic germ in silkworm was:conidia adhered to triangular intersegmental membrane between the dorsal side of silkworm tail and internode firstly,after germinated spores infected into silkworm body,small black parasitic disease spot occurred,along with progress of disease the spot became bigger and bigger,even emerged break of internode,finally,the symptom of black tail formed.
No segregation was observed in the cross progenies of 4 systems with w -2, and they are presumed to be controlled directly by w -2. The local silkworm breed 19-340, with black eye and beige white egg, showed a pattern of general inheritance and had no normal black egg separation in the crossing with w- 3. It is supposed to be a new member of w -3 multiple alleles.
Effects of garlic and black grape extracts on the activity of adenosine deaminase from cancerous and noncancerous human urinary
A black-scholes formula for option pricing with dividends
We obtain a Black-Scholes formula for the arbitrage-free pricing of European Call options with constant coefficients when the underlying stock generates dividends.
The impact of different interference substrate materials for improving the color travel effect was studied, and the influence of white and black background on the hue and the color travel effect were studied.
Nutrient Dynamics of Fine Roots in the Mixed Plantation of Poplar and Black Locust