[Photoperiod-temperature interaction--a new form of seasonal control of growth and development in insects and in particular carabid beetle, Amara communis (coleoptera: carabidae)].

Amara communis larvae are found to develop significantly faster and have higher growth rate at short-day (12 h) as compared to long-day (22 h) photoperiods under all temperatures (16, 18, 20 and 22 degrees C) used. The coefficient of linear regression of larval development rate on temperature was significantly higher at short days than at long days. At that thermal developmental thresholds appeared similar at both photoperiods.

[Sexual dimorphism in photoperiodical plasticity of body mass in the green dock leaf beetle Gastrophysa viridula].

Sexual dimorphism in body mass was studied in prepupae, pupae and immature adults of the green dock leaf beetle Gastrophysa viridula under a constant temperature of 24 degreesC and two photoperiods (12L: 12D and 22L:22D). Females were significantly heavier compared to males at all the three developmental stages; just after emergence from pupae they weighed on average 11.4 mg while males -10.

[Temperature and photoperiodic control of diapause induction in the ant Lepisiota semenovi (Hymenoptera, Formicidae) from Turkmenistan].

The ant L. semenovi has been found to belong to species with endogenous-heterodynamic seasonal life cycles with the obligate diapause induced predominantly by factors internal for a colony, whereas external ecological factors (photoperiods and temperature) produce merely modifying effects by accelerating or delaying the diapause onset. The photoperiodic and temperature regulation of diapause induction in larvae and queens is shown.

[Study of intrapopulation variability of duration and thermal norms of development of the linden bug Pyrrhocoris apterus (Heteroptera, Pyrrhocoridae)].

The existence of significant variability in duration and temperature norms of development has been shown for the first time between families within insect populations. This variability is infer-family and therefore has genetic basis. Revealed for the first time is the statistically significant positive correlations between the regression coefficient of the rate of development for temperature and the threshold of temperature for development of eggs and larvae from different families.

[The first proof of a possibility of change of temperature norms of insect development as a result of artificial selection for rapid or slow development by the example of the red soldier bug Pyrrhocoris apterus (Heteroptera: Pyrrhocoridae)].

For 3-4 generations, selection of the most rapidly and slowly developing nymphs at 28 degrees C was performed on four families of the red soldier bug Pyrrhocoris apterus L. In each generation, duration of development of nymphs was determined at 5 constant temperatures from 20 degrees C to 28 degrees C. From these data there were calculated the linear regression coefficient of the development rate for temperature (the coefficient of the thermolability of development) and the temperature development threshold for each generation.