[The inheritance of irritability to insecticides in malarial mosquitoes]. / Nasledovanie razdrazhimosti k insektitsidam u maliariinykh komarov.

Mosquito populations are not uniform in irritability to insecticides. Due to this reason presentation of the test results as an average number of one mosquito's flights during 10 or 15 minutes contact with insecticide paper does not reflect infrapopulation differences. It is proposed to divide mosquitoes into 3 groups: not irritable (0-1 flight per 10 minutes of contact), moderately irritable (2-9 flights), and highly irritable (10 and more). For the irritability tests only mosquitoes with 0-1 flight (during contact with control paper) were taken. Spontaneously irritable mosquitoes (2 and more flights in control) may become the reason of erroneous results. Yearly and seasonal changes of irritability level in different Anopheles species depending on the insecticide spraying intensity are shown. First proof of the inherited irritability to insecticides and specificity of this quality is obtained. Indirect data indicate that probably polygenic inheritance of irritability takes place in Anopheles.

[Behavior of Anopheles mosquitoes in contact with insecticides]. / Povedenie komarov Anopheles pri kontakte s insektitsidami.

The rate of irritability and "aggressiveness" (attacking activity) at the contact with DDT was determined for all main potential vectors of malaria in the USSR. Great species differences were found out. Changes in the irritability and "aggressiveness" rates with growth of resistance to DDT were traced. The knowledge of resistance rate, initial data on the irritability and "aggressiveness" of each species and the main trends in the changes in mosquitoes behaviour under the effect of DDT makes it possible to predict the effectiveness of DDT in concrete situations. The results of visual observations on the behaviour of malaria vectors in dwelling treated with malathion and propocsur, substitutes for DDT in control on resistant populations, are given.