Bibliographic citations
Deza, V., (2019). Fluctuación poblacional y estrategias de manejo integrado de Gymnetis sp. (Coleoptera: Scarabaeidae) en el cultivo de vid Red Globe [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/3982
Deza, V., Fluctuación poblacional y estrategias de manejo integrado de Gymnetis sp. (Coleoptera: Scarabaeidae) en el cultivo de vid Red Globe [Tesis]. : Universidad Nacional Agraria La Molina; 2019. https://hdl.handle.net/20.500.12996/3982
@mastersthesis{renati/246392,
title = "Fluctuación poblacional y estrategias de manejo integrado de Gymnetis sp. (Coleoptera: Scarabaeidae) en el cultivo de vid Red Globe",
author = "Deza Alvarez, Vanesa Alejandra",
publisher = "Universidad Nacional Agraria La Molina",
year = "2019"
}
Adults of the beetle Gymnetis sp., locally known as "bumblebees", are attracted, feed and damage ripe grape fruits faciltating, at the same time, the entry of rotting pathogens which complicate the plant sanitary condition; their larvae feed mainly on organic matter and sometimes on active plant roots. The objectives of the present work, are to measure the beetle population fluctuation, to determine the duration and the coincidence plant growth with the insect development cycle and to propose the Integrated Management technique combination best adapted to the Red Globe vines, as cultivated at 22.1 °C and 67.7% RH, from November 2014 to August 2015 at the Hacienda Santa Margarita Farm of the Company Agroindustrial Beta, Santiago, Ica, Peru. Larvae, pupae and adults were active during all the phenological stages of the crop. Larvae were more numerous than pupae and the adults: in addition, the larval stage III specimens were in greater quantity than the larval stages I and II. In the soil, adults were present in greater quantity from the maturation of the fruit to the post-harvest. Soil incorporation of organic matter increased the beetle population providing additional food to the larvae, and stimulating the adults to oviposit higher quantity of eggs. The work of pruning decreased the population of adults and larvae I. The manual harvesting as a mechanical control allowed to collect 126,109 larvae. However, the population of larvae was high because the work was performed only for 6 weeks. At the same time the application of TIFON 4E (50 Kg per Ha) was carried out, so no independent effect of the product was observed. The carpotrampas, made of watermelon and grape, as ethological control captured high numbers of adults that maintained minimal populations of the adult, decreasing the oviposition and population of larvae. As a chemical control, the product GALIL 300 SC – 0,5 L/Ha controlled larvae II and larvae III, and ZUKER – 0,2 L/CIL control larvae III. The development cycle of Gymnetis sp. took a total of 215 days at 21.7 ° C and 68.7% RH. The incubation period was 14 days wich in the field that coincides with harvest; larval stage I was 18 days that coincides with harvest and post-harvest; the larval stage II was 46 days that coincides with postharvest; the larval stage III was 92 days coincides with post-harvest and sprouting of the following campaign. The larval stage was 156 days from harvest to sprout. The state of pupa was 45 days coincides with flowering and berry growth. Therefore, due to the length of the development cycle it coincides broadly with the whole phenological campaign of the grape var. Red globe.
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