INVESTIGATION ON CHRYSOPIDAE (NEUROPTERA) AND SPECIALLY ON CHRYSOPERLA CARNEA STEPH. PREDATORY OF APHIDS AND ITS ROLE TO CONTROL OF THE APHIDS IN GREENHOUSES
Abstract
THE INSECT CHRYSOPERLA CARNEA (STEPH.) IS THE MAIN REPRESENTATIVE INSECT OF THECHRYSOPIDAE IN THE HORTICULTURE CROPS IN THE AREA MARATHONA OF ATTICA. IT SEEMS THAT THIS INSECT HAS THREE GENERATIONS PER YEAR AND THE POPULATION INCREASESARE PRESENTED FROM THE BEGINING OF MAY UNTIL THE END OF SEPTEMBER, WHILE IT HIBERNATES IN ADULT STAGE. THE SHORT DURATION OF DAYS (PHOTOPHASIS LESS THAN 14,5 HOURS PER DAY) ARE FORCING THE ADULTS OF C.CARNEA INTO DIAPAUSE, THAT LASTS UNTIL THE END OF JANUARY, BUT IN THE ABOVE MENTIONED AREA ONLY 5% OF THE POPULATION AVOIDS OF DIAPAUSE, SINCE THE ADULTS CONTINUE TO FLY EVEN DURING WINTER. THE DEVELOPMENT OF THE BIOLOGICAL CYCLE OF C.CARNEA IS INFLUENCED BY TEMPERATURE BY TEMPERATURE. THE INCREASE OF TEMPERATURE ARRANGES THE BROODING OF EGGS THE DEVELOPMENT OF LARVE, THE DURATION OF ADULTS AND THE DEPOSITING OF FEMALES. UNDER GREEN HOUSE CONDITIONS (DURING SPRING PERIOD) THE BEGINNING AND THE END OF FLIGHT OF THE ADULTS PRECEDE 30 - 35 DAYS F ...
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