Control of the European grapevine moth<Emphasis Type="Italic">Lobesia botrana</Emphasis> in Greece by the mating disruption technique: A three-year survey |
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| Authors: | Email author" target="_blank">Theodoros?MoschosEmail author C?Souliotis T?Broumas V?Kapothanassi |
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| Institution: | (1) Dept. of Entomology and Agricultural Zoology, Laboratory of Agricultural Entomology, Benaki Phytopathological Institute, GR 14561 Kifissia, Athens, Greece |
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| Abstract: | During 1996–1998 mating disruption trials were conducted on all three generations of the grapevine mothLobesia botrana Den. et Schiff. (Lep., Tortricidae) in a 25-ha vineyard situated at Spata, Attiki, Greece. Shortly before the beginning of
the first flight period ampoule-type pheromone dispensers were set up lining a 6.5-ha rectangular plot. Around the dispenser
zone a protection belt was created whereBacillus thuringiensis (Bt) and selective insecticides were applied against the second and third generation larvae. The protection belt was 35 m wide
and covered 3.5 ha. The rest of the vineyard was divided into the reference plot — where conventional insecticide treatments
were implemented to control both carpophagous pest generations, and the untreated control plot — which measured 1 ha. Male
catches within the dispenser zone were virtually zero. Nevertheless, no difference was apparent between the percentage of
mated females from within and outside of the dispenser zone. Attractant was released from the dispensers throughout the season
at a rather constant rate, but by the middle of the third flight period dispensers were found to be almost empty. During the
3 years of the survey pest pressure was often at exceptionally high levels. The effectiveness of the mating disruption technique
(MDT) was found to vary with year and pest generation. MDT was used against the first (anthophagous) generation with rather
poor results. In the following carpophagous generations results were comparable to control measures with insecticides used
and sometimes slightly better. The density of the pest population in the pheromone-treated vineyard as compared with the untreated
control, was reduced on average by 67% in the second and by 57% in the third generation. MDT therefore did not accomplish
sufficient crop protection.
http://www.phytoparasitica.org posting Dec. 19, 2003. |
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| Keywords: | Grapevine Lobesia botrana pheromone dispenser trap mating disruption |
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