INVESTIGADORES
EGUARAS Martin Javier
artículos
Título:
Formic acid based treatments for the apiary control of Varroa destructor in a Mediterranea area
Autor/es:
SATTA, A; FLORIS,I; EGUARAS,M; CABRAS,P; LUIGI GARAU,V. E MELIS,M
Revista:
JOURNAL OF ECONOMIC ENTOMOLOGY
Editorial:
Entomological Society of America
Referencias:
Año: 2005 vol. 98 p. 267 - 273
ISSN:
0022-0493
Resumen:
ABSTRACT Two formic acid autumnal treatments, gel packets (BeeVar formulation) and impregnated
paperwick (Liebig-Dispenser), were tested in apiary to evaluate their effectiveness againstTwo formic acid autumnal treatments, gel packets (BeeVar formulation) and impregnated
paperwick (Liebig-Dispenser), were tested in apiary to evaluate their effectiveness against
Varroa destructor Anderson & Trueman and their residues in honey in a Mediterranean region
(Sardinia, Italy). Both treatments were efÞcient in the apiary control of the varroosis, with values of
percentage of mite mortality ranging between 93.6 and 100%, without statistical differences between
them. The more gradual release of formic acid from the gel application allowed a longer action (2 wk
for each treatment) compared with the Liebig-Dispenser (3 d for each treatment). The rate of daily
evaporation ranged between5 and 9 g/d from BeeVar and26 and 35 g/d from the Liebig-Dispenser,
in the Þrst and second treatment, respectively. The total amount of formic acid administered per hive
during all the treatment period was 200 g for either treatment. A signiÞcantly higher adult bee
mortality was recorded in the Liebig-Dispenser-treated hives compared with the BeeVar-treated
group. On the contrary, BeeVar treatment produced an interruption of brood reared, whereas the
extension of the sealed brood area of the Liebig-Dispenser-treated hives was not signiÞcantly different
from that of the control hives. Neither queen mortality nor robbing activity was observed due to the
treatments. Formic acid residues in honey collected in the nest were 3,855 2,061 and 3,030 1,624
mg/kg for the BeeVar- and the Liebig-Dispenser-treated hives, respectively. After 21 d from the end
of the treatment, the residues fell to 1,261 1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.Anderson & Trueman and their residues in honey in a Mediterranean region
(Sardinia, Italy). Both treatments were efÞcient in the apiary control of the varroosis, with values of
percentage of mite mortality ranging between 93.6 and 100%, without statistical differences between
them. The more gradual release of formic acid from the gel application allowed a longer action (2 wk
for each treatment) compared with the Liebig-Dispenser (3 d for each treatment). The rate of daily
evaporation ranged between5 and 9 g/d from BeeVar and26 and 35 g/d from the Liebig-Dispenser,
in the Þrst and second treatment, respectively. The total amount of formic acid administered per hive
during all the treatment period was 200 g for either treatment. A signiÞcantly higher adult bee
mortality was recorded in the Liebig-Dispenser-treated hives compared with the BeeVar-treated
group. On the contrary, BeeVar treatment produced an interruption of brood reared, whereas the
extension of the sealed brood area of the Liebig-Dispenser-treated hives was not signiÞcantly different
from that of the control hives. Neither queen mortality nor robbing activity was observed due to the
treatments. Formic acid residues in honey collected in the nest were 3,855 2,061 and 3,030 1,624
mg/kg for the BeeVar- and the Liebig-Dispenser-treated hives, respectively. After 21 d from the end
of the treatment, the residues fell to 1,261 1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.3 d for each treatment). The rate of daily
evaporation ranged between5 and 9 g/d from BeeVar and26 and 35 g/d from the Liebig-Dispenser,
in the Þrst and second treatment, respectively. The total amount of formic acid administered per hive
during all the treatment period was 200 g for either treatment. A signiÞcantly higher adult bee
mortality was recorded in the Liebig-Dispenser-treated hives compared with the BeeVar-treated
group. On the contrary, BeeVar treatment produced an interruption of brood reared, whereas the
extension of the sealed brood area of the Liebig-Dispenser-treated hives was not signiÞcantly different
from that of the control hives. Neither queen mortality nor robbing activity was observed due to the
treatments. Formic acid residues in honey collected in the nest were 3,855 2,061 and 3,030 1,624
mg/kg for the BeeVar- and the Liebig-Dispenser-treated hives, respectively. After 21 d from the end
of the treatment, the residues fell to 1,261 1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.5 and 9 g/d from BeeVar and26 and 35 g/d from the Liebig-Dispenser,
in the Þrst and second treatment, respectively. The total amount of formic acid administered per hive
during all the treatment period was 200 g for either treatment. A signiÞcantly higher adult bee
mortality was recorded in the Liebig-Dispenser-treated hives compared with the BeeVar-treated
group. On the contrary, BeeVar treatment produced an interruption of brood reared, whereas the
extension of the sealed brood area of the Liebig-Dispenser-treated hives was not signiÞcantly different
from that of the control hives. Neither queen mortality nor robbing activity was observed due to the
treatments. Formic acid residues in honey collected in the nest were 3,855 2,061 and 3,030 1,624
mg/kg for the BeeVar- and the Liebig-Dispenser-treated hives, respectively. After 21 d from the end
of the treatment, the residues fell to 1,261 1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.200 g for either treatment. A signiÞcantly higher adult bee
mortality was recorded in the Liebig-Dispenser-treated hives compared with the BeeVar-treated
group. On the contrary, BeeVar treatment produced an interruption of brood reared, whereas the
extension of the sealed brood area of the Liebig-Dispenser-treated hives was not signiÞcantly different
from that of the control hives. Neither queen mortality nor robbing activity was observed due to the
treatments. Formic acid residues in honey collected in the nest were 3,855 2,061 and 3,030 1,624
mg/kg for the BeeVar- and the Liebig-Dispenser-treated hives, respectively. After 21 d from the end
of the treatment, the residues fell to 1,261 1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.2,061 and 3,030 1,624
mg/kg for the BeeVar- and the Liebig-Dispenser-treated hives, respectively. After 21 d from the end
of the treatment, the residues fell to 1,261 1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.1,054 and 794 518 mg/kg for the honey sampled from
the BeeVar and Liebig-Dispenser groups, respectively.