Gunasekaran K, Shriram A N, Elangovan A, Narayanan R J, Balaraman K
Vector Control Research Center, Indira Nagar, Pondicherry, India.
Southeast Asian J Trop Med Public Health. 1996 Sep;27(3):622-7.
'Spherifix', an alginate based slow release formulation of Bacillus sphaericus was field tested in different types of breeding habitats of Culex quinquefasciatus at the dose of 15 kg ai/ha at bimonthly interval. The efficacy of the formulation was higher in most of the months except in rainy and post-rainy months. The mean percentage reduction +/-SD during the treatment phase of one year was 31.2 +/- 17.9, 50 +/- 29.4, 28.3 +/- 17.6, 30.3 +/- 21.1, 66 +/- 22.5 and 53 +/- 20.4 in larval density and 49 +/- 20.8, 65.1 +/- 26.1, 30.3 +/- 21.9, 59.8 +/- 22.6, 63.1 +/- 21.9 and 47.7 +/- 24.2 in pupal density respectively in cement tanks, cesspools, cesspits, disused wells, unlined drains and cement lined drains. The reduction in immature density was relatively higher in undisturbed, debris free and shallow habitats such as cesspools, unlined drains and cement lined drains. After withdrawal of treatment, the effect of the formulation could be seen for a period of four months.
“球形芽孢杆菌固定剂”是一种基于海藻酸盐的球形芽孢杆菌缓释制剂，在按每公顷15千克有效成分的剂量、每两个月一次的间隔下，于致倦库蚊不同类型的孳生地进行了田间试验。除了雨季和雨后月份外，该制剂在大多数月份的效果都更高。在为期一年的处理阶段，水泥池、污水池、污水坑、废弃水井、无衬砌排水渠和水泥衬砌排水渠中幼虫密度的平均降低百分比±标准差分别为31.2±17.9、50±29.4、28.3±17.6、30.3±21.1、66±22.5和53±20.4，蛹密度的平均降低百分比±标准差分别为49±20.8、65.1±26.1、30.3±21.9、59.8±22.6、63.1±21.9和47.7±24.2。在污水池、无衬砌排水渠和水泥衬砌排水渠等未受干扰、无杂物且较浅的孳生地中，未成熟虫口密度的降低相对较高。停止处理后，该制剂的效果可持续四个月。
