Forecasting and the possibility of suppression of the harmful noctuid species in vineyards and orchards | Prognoza in moznosti zatiranja skodljivih vrst sovk (Noctuidae) v trajnih nasadih
2007
Tomse, S., Smihelska c. 14, 8000 Novo mesto (Slovenia) | Pavlin, K. | Bajec, D. | Gomboc, S., Fitosanitarna uprava, Ljubljana (Slovenia)
In vineyards and orchards of southeast Slovenia was in the last few years registered increased appearance of caterpillars of Noctuid species Noctua comes and N. fimbriata. These caterpillars damaged 30-60 % of buds. The pest was before the appearance of the damage unknown and the diagnosed Noctuid species appeared in this area before that time only sporadically. The reason for this could be also solely nocturnal activity of moths and caterpillars. The first mass appearance of Noctuid caterpillars was seen in the year 1999, and after that they appeared every year with different stages of economic loss. In the years 2001-2003 we researched bionomics of the pests. In 2004 and 2005 we continued the research with intention of predicting this phenomenon and the possibility of its extermination. For this purpose, we used pyramid and automatic light traps and also pheromone traps. With the exception of the already known mechanical methods, we also conducted field and laboratory trials using phytopharmaceutical means. For the experiments we have chosen insecticides with active substances: teflubenzuron, methoxyfenozide, chlorpyrifos-methyl, spinosad and SYN324A (naturalit). While processing statistical data, we established the highest efficacy of insecticides with active substance methoxyfenozide. At the statistical data evaluation was the most important factor the time of effectiveness, because of the caterpillar's capability to make damage in a short time.
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