野外におけるマダニの生物学的駆除について : II. BHCによるマダニ駆除の実験

概要

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1. For the purpose to control the tick in the field, the BHC resistance in each developmental stages of the tick were tested in laboratory. The following results were obtained: (1). There is no significant difference in the BHC effect for resistance between γ-BHC and its emulsion for the tick. (2). There are some correlations between density of BHC emulsion and motality of the tick as shown in Fig. 1. Motality of the tick in 0.1% and 0.05% BHC emulsion is equal and that in 0.025% BHC emulsion is lower than them. Therefor, the 0.05% emulsion of γ-BHC is most effective for the tick control. (3). From the view-point of the developmental stage, it was found that nymph is of highest resistance to γ-BHC. (4). There is no resistance to low humidity for the tick. 2. Field tests were also carried out in the farm of KEEP from June 1966 to June 1969. The results obtained are as follows: (1). Dusting the emulsion of 0.05% BHC is efective to control the tick. (2). Resting pasturage is more effective to control the tick in the field than dusting emulsion.
信州大学教養部の論文
1970-02-28