Susceptibility of Phlebotomus argentipes against DDT in endemic Districts of North Bihar, India.
Susceptibility status of Indian kala-azar vector Phlebotomus argentipes after DDT spray from endemic areas of Muzaffarpur and Vaishali district and unsprayed non-endemic area of Patna district, Bihar, India were compared. Higher Lc50 viz. 2.6% and 3.2% and LT50, values 51.0 and 69.0 minutes to 4% DDT were observed for P. argentipes of Muzaffarpur and Vaishali district, whereas P. argentipes of Patna district was 100% susceptible to same concentration, indicating increased tolerance in P. argentipes. It is concluded DDT resistant P. argentipes, particularly in endemic zone growing. The possible explanation could be long-term insecticidal pressure.
Kishore
K
K
Department of Vector Biology & Control, Rajendra Memorial Research Institute of Medical Sciences, Indian Council of Medical Research, Agamkuan, Patna-800 007.
Kumar
V
V
Kesari
S
S
Bhattacharya
S K
SK
Das
P
P
D000818:Animals; D003634:DDT / Q000008:administration & dosage / Q000494:pharmacology*; D019353:Endemic Diseases; D005260:Female; D007194:India / Q000453:epidemiology; D007303:Insect Vectors / Q000187:drug effects*; D007305:Insecticide Resistance; D007898:Leishmaniasis, Visceral / Q000517:prevention & control / Q000635:transmission; D010691:Phlebotomus / Q000187:drug effects*
D003634:DDT