Life history traits and life table analysis of <i>Lobiopa insularis</i> (Coleoptera: Nitidulidae) fed on strawberry

Lobiopa insularis is a newly reported pest of strawberry in Argentina. We investigated characteristics of its biology in the laboratory, including survivorship and reproduction. We also estimated population growth for L. insularis fed ripe strawberry fruits. Lobiopa insularis was not observed ovipositing on strawberry fruits. A higher proportion of egg masses were recorded from a depth of 1 cm within the soil than on either the soil surface or deeper than 1cm (i.e. between 1and 2 cm) within the soil. The duration of preimaginal developmental stages represented ∼18.5% of the total life cycle, while the adult stage represented 81.5%. Survival from egg to adult was 64.20% and mean longevity of females and males adults was 121.84, (SE = 8.86) and 118.58 (SE = 5.90) days, respectively. Females laid eggs only when they were with a male, so reproductive period was dependent on male presence. The number of eggs/female/day was 18.01 (SE = 1.71); and total fecundity was 1655 (ES = 249.53) eggs/female. The long life span of adults and high reproductive output, i.e high fecundity and long reproductive period, indicate that availability and concentration of suitable developmental resources are important factors in the population dynamics of Lobiopa insularis associated with strawberry crops.Centro de Estudios Parasitológicos y de VectoresFacultad de Ciencias Naturales y Muse

Life history traits and life table analysis of <i>Lobiopa insularis</i> (Coleoptera: Nitidulidae) fed on strawberry

Lobiopa insularis is a newly reported pest of strawberry in Argentina. We investigated characteristics of its biology in the laboratory, including survivorship and reproduction. We also estimated population growth for L. insularis fed ripe strawberry fruits. Lobiopa insularis was not observed ovipositing on strawberry fruits. A higher proportion of egg masses were recorded from a depth of 1 cm within the soil than on either the soil surface or deeper than 1cm (i.e. between 1and 2 cm) within the soil. The duration of preimaginal developmental stages represented ∼18.5% of the total life cycle, while the adult stage represented 81.5%. Survival from egg to adult was 64.20% and mean longevity of females and males adults was 121.84, (SE = 8.86) and 118.58 (SE = 5.90) days, respectively. Females laid eggs only when they were with a male, so reproductive period was dependent on male presence. The number of eggs/female/day was 18.01 (SE = 1.71); and total fecundity was 1655 (ES = 249.53) eggs/female. The long life span of adults and high reproductive output, i.e high fecundity and long reproductive period, indicate that availability and concentration of suitable developmental resources are important factors in the population dynamics of Lobiopa insularis associated with strawberry crops.Centro de Estudios Parasitológicos y de VectoresFacultad de Ciencias Naturales y Muse

Life history traits and life table analysis of <i>Lobiopa insularis</i> (Coleoptera: Nitidulidae) fed on strawberry

Lobiopa insularis is a newly reported pest of strawberry in Argentina. We investigated characteristics of its biology in the laboratory, including survivorship and reproduction. We also estimated population growth for L. insularis fed ripe strawberry fruits. Lobiopa insularis was not observed ovipositing on strawberry fruits. A higher proportion of egg masses were recorded from a depth of 1 cm within the soil than on either the soil surface or deeper than 1cm (i.e. between 1and 2 cm) within the soil. The duration of preimaginal developmental stages represented ∼18.5% of the total life cycle, while the adult stage represented 81.5%. Survival from egg to adult was 64.20% and mean longevity of females and males adults was 121.84, (SE = 8.86) and 118.58 (SE = 5.90) days, respectively. Females laid eggs only when they were with a male, so reproductive period was dependent on male presence. The number of eggs/female/day was 18.01 (SE = 1.71); and total fecundity was 1655 (ES = 249.53) eggs/female. The long life span of adults and high reproductive output, i.e high fecundity and long reproductive period, indicate that availability and concentration of suitable developmental resources are important factors in the population dynamics of Lobiopa insularis associated with strawberry crops.Centro de Estudios Parasitológicos y de VectoresFacultad de Ciencias Naturales y Muse

Transferencia de una estrategia de manejo de la “arañuela roja” a productores de frutilla del cinturón hortícola del Gran La Plata

La plaga principal del cultivo de frutilla es la “arañuela roja” o “arañuela de las dos manchas”, Tetranychus urticae. Su control consiste en aplicaciones de acaricidas de manera preventiva y muchas veces innecesarias. En los cultivos se encuentra también un ácaro depredador, Neoseiulus californicus, que puede controlar a la plaga. Nuestro objetivo fue transferir a los pequeños y medianos productores del Cinturón Hortícola del Gran La Plata, una nueva estrategia de manejo de la arañuela basada en la presencia de este enemigo natural. La misma consiste en monitoreos de la presencia de ambos ácaros, para luego consultar una tabla que indicará si es necesario aplicar acaricidas. En cuatro predios se entrenó a los trabajadores en el reconocimiento y monitoreo de las especies y en la toma de decisiones. La implementación de esta nueva estrategia permitió reducir entre un 87 y 100 % las aplicaciones de acaricidas.The main pest of the strawberry crops is the “Two spotted spider mite”, Tetranychus urticae. Its control consists of preventive applications of acaricides, wich are many times unnecessary. In the crops also is an predator mite, Neoseiulus californicus, that can control the pest. Our objective was to transfer to the small and medium growers, of the Horticultural belt of La Plata city, a new management strategy of the pest based on the presence of this natural enemy. This one consists of monitoring the presence of both mites, and then to consult a table that it will indicate if it is necessary to apply acaricides. In four orchards we trained to the workers in the recognition and monitoring of mites, and in the decision making. The implementation of this new strategy allowed reducing between 87 and 100% the application of acaricides.Facultad de Ciencias Naturales y Muse

Transferencia de una estrategia de manejo de la “arañuela roja” a productores de frutilla del cinturón hortícola del Gran La Plata

La plaga principal del cultivo de frutilla es la “arañuela roja” o “arañuela de las dos manchas”, Tetranychus urticae. Su control consiste en aplicaciones de acaricidas de manera preventiva y muchas veces innecesarias. En los cultivos se encuentra también un ácaro depredador, Neoseiulus californicus, que puede controlar a la plaga. Nuestro objetivo fue transferir a los pequeños y medianos productores del Cinturón Hortícola del Gran La Plata, una nueva estrategia de manejo de la arañuela basada en la presencia de este enemigo natural. La misma consiste en monitoreos de la presencia de ambos ácaros, para luego consultar una tabla que indicará si es necesario aplicar acaricidas. En cuatro predios se entrenó a los trabajadores en el reconocimiento y monitoreo de las especies y en la toma de decisiones. La implementación de esta nueva estrategia permitió reducir entre un 87 y 100 % las aplicaciones de acaricidas.The main pest of the strawberry crops is the “Two spotted spider mite”, Tetranychus urticae. Its control consists of preventive applications of acaricides, wich are many times unnecessary. In the crops also is an predator mite, Neoseiulus californicus, that can control the pest. Our objective was to transfer to the small and medium growers, of the Horticultural belt of La Plata city, a new management strategy of the pest based on the presence of this natural enemy. This one consists of monitoring the presence of both mites, and then to consult a table that it will indicate if it is necessary to apply acaricides. In four orchards we trained to the workers in the recognition and monitoring of mites, and in the decision making. The implementation of this new strategy allowed reducing between 87 and 100% the application of acaricides.Facultad de Ciencias Naturales y Muse

Life history traits and life table analysis of Lobiopa insularis (Coleoptera: Nitidulidae) fed on strawberry.

Lobiopa insularis is a newly reported pest of strawberry in Argentina. We investigated characteristics of its biology in the laboratory, including survivorship and reproduction. We also estimated population growth for L. insularis fed ripe strawberry fruits. Lobiopa insularis was not observed ovipositing on strawberry fruits. A higher proportion of egg masses were recorded from a depth of 1 cm within the soil than on either the soil surface or deeper than 1cm (i.e. between 1and 2 cm) within the soil. The duration of preimaginal developmental stages represented ~18.5% of the total life cycle, while the adult stage represented 81.5%. Survival from egg to adult was 64.20% and mean longevity of females and males adults was 121.84, (SE = 8.86) and 118.58 (SE = 5.90) days, respectively. Females laid eggs only when they were with a male, so reproductive period was dependent on male presence. The number of eggs/female/day was 18.01 (SE = 1.71); and total fecundity was 1655 (ES = 249.53) eggs/female. The long life span of adults and high reproductive output, i.e high fecundity and long reproductive period, indicate that availability and concentration of suitable developmental resources are important factors in the population dynamics of Lobiopa insularis associated with strawberry crops

Reproductive attributes of <i>Lobiopa insularis</i> fed ripe strawberry fruits.

<p>Reproductive attributes of <i>Lobiopa insularis</i> fed ripe strawberry fruits.</p

Reproductive value for different ages of <i>Lobiopa insularis</i> females (in days) fed ripe strawberry fruits.

<p>Arrows indicate the onset of the larval, pupal and adult developmental stages. The pre-reproductive stage (PRA) was differentiated from the onset of the reproductive stage (RA).</p

Mean and standard deviation of duration (days) of developmental stages of <i>Lobiopa insularis</i> fed ripe strawberry fruits.

<p>Mean and standard deviation of duration (days) of developmental stages of <i>Lobiopa insularis</i> fed ripe strawberry fruits.</p

Life history traits and life table analysis of <i>Lobiopa insularis</i> (Coleoptera: Nitidulidae) fed on strawberry

<div><p><i>Lobiopa insularis</i> is a newly reported pest of strawberry in Argentina. We investigated characteristics of its biology in the laboratory, including survivorship and reproduction. We also estimated population growth for <i>L</i>. <i>insularis</i> fed ripe strawberry fruits. <i>Lobiopa insularis</i> was not observed ovipositing on strawberry fruits. A higher proportion of egg masses were recorded from a depth of 1 cm within the soil than on either the soil surface or deeper than 1cm (i.e. between 1and 2 cm) within the soil. The duration of preimaginal developmental stages represented ~18.5% of the total life cycle, while the adult stage represented 81.5%. Survival from egg to adult was 64.20% and mean longevity of females and males adults was 121.84, (SE = 8.86) and 118.58 (SE = 5.90) days, respectively. Females laid eggs only when they were with a male, so reproductive period was dependent on male presence. The number of eggs/female/day was 18.01 (SE = 1.71); and total fecundity was 1655 (ES = 249.53) eggs/female. The long life span of adults and high reproductive output, i.e high fecundity and long reproductive period, indicate that availability and concentration of suitable developmental resources are important factors in the population dynamics of <i>Lobiopa insularis</i> associated with strawberry crops.</p></div