Control de Talponia batesi Henrich (Lepidoptera: Tortricidae) mediante embolsado de frutos en chirimoya (Annona cherimola Mill.)

Se evaluó la eficiencia de tres tipos de embolsado de frutos en dos cultivares y una selección local de chirimoya (‘Concha lisa’, ‘Bays’ y Selene) para el control de Talponia batesi, as´ı como su efecto sobre variables morfométricas de calidad de los frutos. Los tratamientos fueron: testigo (sin embolsar), embolsado de frutos con polipropileno, polietileno y papel encerado. Los tratamientos con bolsas de papel encerado y polietileno tuvieron una eficiencia del 70 y 60 %; aquellos con polipropileno y testigo fueron los más afectados con 82 y 92% respectivamente. Las otras variables morfométricas mostraron diferencias distintivas en cada cultivar y/o selección como era de suponerse a lo reportado. En Concha lisa y Bays se observó que el tratamiento con mejores resultados fueron las bolsas de papel encerado con el menor número de perforaciones por fruto, 4,2 y 2,4 respectivamente; mientras que en Selene tuvo mejor efecto el polietileno con un promedio de 4,2 perforaciones/fruto; pero en las tres variedades embolsadas con polipropileno fue el menos efectivo seguido del testigo. El embolsado de frutos con papel encerado en los tres cultivares y/o selecciones fue el que obtuvo mejores resultados con solo 4% de semillas dañadas por las larvas de T. batesi

Silkworm (Bombyx mori L.) fed with mulberry (Morus alba L.) leaves and cow’s milk: SILKWORM FED ON MULBERRY LEAVES AND COW'S MILK

ABSTRACT Objective: In this research, the effect of cow's milk as a protein supplement to improve the growth and expression of productive parameters in the B. mori silkworm was evaluated. Design / methodology / approach: Four silkworm treatments were fed with mulberry foliage supplemented with milk, as well as a control treatment that was fed with only fresh mulberry leaves. Feeding was determined for the last two larval instars. The groups were: Treatment 1: V instar- TD, Treatment 2: V instar-DI, Treatment 3: IV and V instar- TD, and Treatment 4: IV and V instar- D1. Results: The larvae fed with milk supplemented foliage obtained increased growing and larval weight rates, as well as spinning a cocoon sooner than the ones in the controlled treatment. Additionally, differences were also noticed on the weight of the cocoon, silk percentage and weight of the pupae, relevant characteristics for the production of silk. Limitations of the study / implications: In the literature review, it was found that there are very few published works on the silkworm fed with cow's milk and mulberry leaves. Findings / conclusions: We conclude that supplementing has a positive effect over the growing rates and evaluated characteristics, directly influencing on the enhancement of the performance for silk production. Keywords: silkworm, milk, mulberry, economic parameters, supplementation.Objective: To evaluate the effect of cow’s milk as a protein supplement to improve growth and expression of productive parameters in the silkworm (Bombyx mori L.). Design/Methodology/Approach: Four treatments with mulberry foliage supplemented with milk were used, plus a control (which was fed with fresh leaf). Feeding was determined for the last two larval instars, resulting in the following groups: Treatment 1: V instar-TD, Treatment 2: V instar-DI, Treatment 3: IV and V instar-TD, and Treatment 4: IV and V instar-DI. Results: Larvae fed with foliage supplemented with milk obtained an increase in growth rate and larval weight and formed their cocoons faster than the control. Additionally, there were differences in cocoon weight, silk percentage, and pupal weight, relevant traits for silk production. Study Limitations/Implications: Very few works have been published about silkworms fed with mulberry foliage supplemented with milk. Findings/Conclusions: Supplementation has a positive effect on growth and the evaluated traits, improving the yield of silk production

Silkworm (Bombyx mori L.) fed with mulberry (Morus alba L.) leaves and cow’s milk

Objective: To evaluate the effect of cow’s milk as a protein supplement to improve growth and expression of productive parameters in the silkworm (Bombyx mori L.). Design/Methodology/Approach: Four treatments with mulberry foliage supplemented with milk were used, plus a control (which was fed with fresh leaf). Feeding was determined for the last two larval instars, resulting in the following groups: Treatment 1: V instar-TD, Treatment 2: V instar-DI, Treatment 3: IV and V instar-TD, and Treatment 4: IV and V instar-DI. Results: Larvae fed with foliage supplemented with milk obtained an increase in growth rate and larval weight and formed their cocoons faster than the control. Additionally, there were differences in cocoon weight, silk percentage, and pupal weight, relevant traits for silk production. Study Limitations/Implications: Very few works have been published about silkworms fed with mulberry foliage supplemented with milk. Findings/Conclusions: Supplementation has a positive effect on growth and the evaluated traits, improving the yield of silk production