Naslov
Area-wide control of sugar beet weevil (Bothynoderes punctiventris Germar) by mass trapping with aggregation pheromones
(Area-wide control of sugar beet weevil(Bothynoderes punctiventris Germar) by mass trapping with aggregation pheromones)

Autori
Drmić, Zrinka ; Bažok, Renata ; Toth, Miklos

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Future IPM in Europe : abstracts / Pertot, I. ; Ioriatti, C. ; Lescourret, F. ; Wolf, M. - , 2013, 275-275

Skup
Future IPM in Europe

Mjesto i datum
Riva del Garda, Italija, 19.03.2013. - 21.03.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
aggregation pheromones ; area wide control ; mass trapping ; sugar beet weevil

Sažetak
The sugar-beet weevil (Bothynoderes punctiventris Germar) (Coleoptera: Curculionidae) is an important pest of sugar-beet throughout central, eastern and southeastern parts of Europe. In the areas with drier climate the weevil represents the most destructive insect pest of sugar-beet. Out of approximately 30, 000 ha sown with sugar beet in Croatia, in County of Vukovar-Srijem (CVS) sugar beet is sown on 10, 000 ha. As a newly emerged pest in CVS sugar beet weevil is a very important pest during the emergence and early developmental stages. Overwintering adults cause damage by feeding on sugar-beet seedlings. Pesticide applications do not provide successful control due to specific insect feeding habits, morphological traits and low sensibility to insecticides. Some investigations suggested that mass trapping of weevils on newly planted sugar beet fields could be an effective strategy which fits with the requirements of an integrated pest management system. Since adult weevils overwinter in the old sugar beet fields we hypothesized that mass trapping of weevils would be more efficient if it is carried out on overwintering sites on a large area. A three year program of area-wide sugar beet weevil control by mass trapping started in Croatia (in CVS) in 2012. An area of 540 ha (5.4 km2) was marked and all fields on which sugar beet was planted in 2011 were identified. Altogether 14 old sugar beet fields (69 ha) in the marked area were identified and surveyed in March in order to establish the average infestation by overwintering weevils. Altogether 928 traps baited by aggregation pheromones for sugar beet weevil (Csalomon) were set up on these fields between 13 and 16 March 2012 at the average density of 15 traps/ha. Traps were distributed in the grid at a distance of 35-33 x 20-25 m (depending on the field size and shape). Traps were checked weekly between March 13 and April 24. Captured weevils were counted. The average infestation ranged between 0 and 17.19 weevils/m2. Established weevil population in the marked area was approximately 2.3 millions of individuals. A total of 158, 641 weevils were captured. Considering 0.3 weevils/m2 as an economic threshold, estimated weevil population was capable to cause economic damage on 767 ha, while captured weevils were capable to destroy 53 ha of newly planted sugar beet fields. In the marked area, 16 fields covering 247.57 ha were planted by sugar beet in 2012. In spite the high capture, 15 traps/ha were capable to catch only an average of 6.8 % of overwintering weevil population. In the condition of strong attack as it was recorded in the marked area, it wasn't enough to avoid the insecticide application. However, the infestation was postponed and the number of insecticide treatments was reduced comparing to the other sugar beet fields outside of marked area. To achieve greater population reduction, the number of traps should be increased and the trap distribution should be rearranged in 2013.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

Napomena
Radom su prezentirani rezultati postignuti u sklopu projekta Nacionalne zaklade za znanost „Unaprjeđenja u tehnologiji proizvodnje šećerne repe sukladno načelima integrirane zaštite od štetnika“.

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