Abstract
Mazkur maqolada Trichoderma lignorum asosidagi biopreparatning Agrotis segetum lichinkalariga nisbatan entomotsid ta’siri laboratoriya sharoitida baholandi. Tadqiqot ikki variantda tashkil etildi: nazorat variantida lichinkalar, biopreparat bilan ishlov berilmagan o‘simlik barglari bilan oziqlantirildi, tajriba variantida esa zubturum (Plantago major L.) va pechak (Convolvulus arvensis L.) barglari T. lignorum asosidagi suspenziya bilan ishlov berilib, lichinkalarga oziqa sifatida berildi. Har bir variantda 20 tadan lichinka qo‘llanilib, ularning yashovchanligi 48 soatlik intervalda monitoring qilindi. Kuzatuv natijalari tajriba variantida lichinkalar sonining vaqt omiliga bog‘liq ravishda izchil kamayib borishini ko‘rsatdi hamda tajriba yakunida 95% gacha o‘lim darajasi qayd etildi, nazorat variantida esa lichinkalar yashovchanligi deyarli barqaror saqlanib qoldi. Olingan natijalar Trichoderma lignorum asosidagi biopreparatning A. segetum lichinkalariga nisbatan yuqori darajadagi entomopatogen faollikka ega ekanligini tasdiqlaydi. Lichinkalar o‘limining bosqichma-bosqich ortib borishi preparatning kumulyativ ta’sir mexanizmini namoyon etdi. Tadqiqot natijalari Trichoderma lignorum asosidagi biologik preparatlarning polifag zararkunandalarga qarshi kurashda ekologik xavfsiz, selektiv va samarali biokontrol vositasi sifatida qo‘llash istiqbolli ekanligini ko‘rsatdi.
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