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Vai kāds nezin Latvijā teritoriju, kur būtu savairojušies priežu lielie lūksngrauži??
26, 2006, 19:54Ieva
:-:

    Un vēl - cik ilgam laikam no egles nociršanas brīža jāpaiet, lai tajā ieperinātos egļu 8-zobu mizgrauži? Vai ar trīs četrām dienām pietiek (ja egle cirsta tagad, jūlija beigās, apkaimē, kur šīs sugas mizgrauži nav masveidā savairojusies)? Un cik ilgs laiks paiet no brīža, kad kukainīši sāk grauzt egli līdz brīdim, kad izšķiļas kāpuri?
    26, 2006, 21:12Ieva

    Ieva,
    Lūksngrauži priežu mežos sastopami pastāvīgi. Ja gribi atrast, tad mekle pagājušajā gadā atmirušus kokus. Tagad vajadzētu būt jau vabolēm, kuras ziemos.
    Par egļu astoņzobu mizgrauzi. Šogad ir karsta vasara un var attīstīties mizgrauža otrā paaudze, kurai tieši pašlaik ir lidošanas laiks. Vabole nozāģētu koku atrod pēc sveķu smaržas. Tās koku var sākt grauzt jau nākamajā dienā pēc koka nociršanas. Lai gan sveķi vēl ir tekoši, vaboli tas īpaši neietekmē. Mizgrauzis mēģina iegrauzties arī ārēji veselās eglēs. Kāpuru attīstības ilgums ir atkarīgs no temperatūras. Ja turpmāk būs silts laiks, tad līdz rudenim attīstīsies otrās paaudzes vaboles. Attīstības ilgums no olas līdz nobriedušai vabolei ir apmēram 75-85 dienas.
    1, 2006, 17:19Mizgrauzis
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