RESEARCHES REGARDING EVOLUTION OF SPECIAE Chrysoperla carnea - Neuroptera FAUNA IN CORN AGRO ECOSYSTEM

Published in Scientific Papers. Series A. Agonomy., Vol. LVI
Written by Diana COMAN, Ioan ROŞCA

Corn agricultural agroecosystems is considered unstable ecosystems, with specific interdependencies between different food chains that natural factors play a role. A large number of insects are living in the maize agroecosystem, being a species community and each species has a particular place in the food chains. If a lot of studies were done, in Romania about biology, ecology and control of corn insect pest, there are little knowledge about beneficial fauna especially on the correlation between presences of Chrysoperla carnea species during different phases of corn vegetation. Evolution of Chrysoperla carnea population was assessed using yellow sticky traps, type Pherocone AM trap, which were installed, harvested and replaced, biweekly. Experiences from 2011-2012 had the main objective to observe the potential impact of GMO-maize on Chrysoperla carnea for Neuropteran fauna existing on 14 corn cultivars (7 conventional corn hybrids and 7 hybrids containing transformation events (glyphosate-tolerant, corn rootworm protected, resistant to Lepidopteran and with two of transformation events).Variants were in 4 replications, each corn plot had 4 rows and plot’s area was 20.3 m2. the flowering stage in corn, which involves pollen shed and silking, then this reduces their agroecosystem easy (their presence will continue to be significant) and their number gradually reduce towards the end of vegetation maize. There are no differences on the structure and quantity of wildlife Neuropterans between different hybrids.

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COMAN D., ROŞCA I. 2013, RESEARCHES REGARDING EVOLUTION OF SPECIAE Chrysoperla carnea - Neuroptera FAUNA IN CORN AGRO ECOSYSTEM. Scientific Papers. Series A. Agonomy., Vol. LVI, ISSN 2285-5785, 480-483.


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