[Improvement of monitoring of quantity dynamics and structure of pea aphid (Acyrthosiphon pisum Harris) population]
Boyar, D.M.(Grodno State Agrarian Univ. (Belarus))
Pea aphid (Acyrthosiphon pisum Harris) population structure is an important parameter characterizing its state and dynamics development stage. In a year of depression females and preimago stage larvae form more than 45% of population that indicates the suppression of female reproductive function and a significant death of small instar larvae; in a year of mass pest development more than 40% of larvae population is prevailed by I-instar larvae. According to the results of 2000-2002 researches the method of the entomological net cutting does not fully reflects the structure of pea aphid population. In biological researches it is preferable to use the modified method of aphid number record - aphid shaking on cartoon plane-table with subsequent plant examination. Air temperature and atmospheric precipitates are the main factors influencing the dynamics of quantity and structure of pea aphid population
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