Explore of microsporidian biocontrol prodenia litura
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微孢子虫防治斜纹夜蛾的探索研究 Explore of microsporidian biocontrol Prodenia Litura PowerPoint PPT Presentation


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微孢子虫防治斜纹夜蛾的探索研究 Explore of microsporidian biocontrol Prodenia Litura. 杨琼,廖森泰,方定坚 等 YANG Qiong, LIAO Sentai, FANG Dingjing , et al ( 广东省农业科学院蚕业研究所 ) (Sericultural Research Institute, Guangdong Academy of Agricultural Sciences ). 研究内容 Content. 一、室内研究部分 (Laboratory reasearch)

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微孢子虫防治斜纹夜蛾的探索研究 Explore of microsporidian biocontrol Prodenia Litura

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Explore of microsporidian biocontrol Prodenia Litura

YANG Qiong, LIAO Sentai, FANG Dingjinget al

( )

(Sericultural Research Institute, Guangdong Academy of Agricultural Sciences


Content

(Laboratory reasearch)

(Field experiment)


.Laboratory reasearch

1.(Biology)

2.(Pathology)

3.(Population life table)


Size:2.720.121.980.22m

Nb

Size: 3.450.15

2.250.15m


Unicleate

Binucleate

Ultrastructure


Nosema

Thelohania

( Life cycle )


2.(Pathology)

2.1Infection rate)

2.2(Mortality rate)

2.3(Appetite )

2.4(Fecundity)

2.5(Transmission way)

2.6(Infection tissue)



1

(Table 1 Infection rate investigate)


2

(Table 2 Mortality rate investigate)


3

Table 3 50% Lethal time investigate


108

107

106

105

104

103


108

107

106

105

104

103


3


4

Table 4 Influence of microsporidium to

Prodenia Litura Fecundity


2.5 Transmission way :Peroral and Transovarian transmission

2.6

Infection tissue:Systemic infection


3.(Population life table)

105/ mL0.560.45330.95411.580.0119106/ mL107/ mL


The microsporidium had good control effects on the population of Prodenia Litura . When the dose was 105 spores/mL, the survival rate of larvae was 0.56, emergence rate of the pupae was 0.4533, the decrease rate of adult fecundity was 0.9541, index of population trends decreased to 1.58, and the relevant IIPCwas 0.0119. When the dose was 106 spores/mL, though some adults emerged from the pupa stage, no oviposition was observed. When the dose was 107 spores/mL,the larvae never developed into pupae, as all were killed in larva stage.


(Field experiment)


6%~13%74%~52%106 /ml12105/ml3


YABY0.9620-0.0426A-0.0455AB1106/mL30.0152


Studying the control effect of the microsporidium on the natural population by using the uniform design method. Regression models among dosage(A), frequency of spraying (b) and relevant IIPC values(Y) were built:Y=0.9620-0.0426B-0.0455AB


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