Evaluation of the injuries caused by Pachycoris torridus (Scopoli, 1772) (Hemiptera: Scutelleridae) in Jatropha curcas (Linnaeus) (Euphorbiaceae)
| Autor: | Laurício Endres, Edjane Vieira Pires, Andrea Marques Vanderlei Fregadolli, Paulo Vanderlei Ferreira, Juan Manuel Pérez Ramos, Fábio Luiz Fregadolli |
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| Rok vydání: | 2020 |
| Předmět: |
Perennial plant
lcsh:Biotechnology Scutelleridae medicine.disease_cause lcsh:TP248.13-248.65 Infestation medicine lcsh:Agriculture (General) photochemical efficiency bug of the jatropha General Veterinary biology business.industry fungi Pest control Euphorbiaceae food and beverages Sowing plant growth biology.organism_classification lcsh:S1-972 accumulation of biomass Horticulture bug of the Jatropha PEST analysis General Agricultural and Biological Sciences business Jatropha curcas |
| Zdroj: | Revista Ceres, Vol 67, Iss 2, Pp 119-125 Revista Ceres, Volume: 67, Issue: 2, Pages: 119-125, Published: 08 MAY 2020 Revista Ceres v.67 n.2 2020 Revista Ceres Universidade Federal de Viçosa (UFV) instacron:UFV |
| ISSN: | 2177-3491 0034-737X |
| DOI: | 10.1590/0034-737x202067020004 |
| Popis: | The Jatropha curcas species is a perennial plant and easy to manage, being cultivated in many countries because of its high content in oil and the lowest cost of production. This study had as objective to evaluate the injuries caused by the Pachycoris torridus in J. curcas seedlings. Thirty-four days after the planting, 30 J. curcas seedlings were covered with screens and submitted to herbivory of five bugs of the same sex. Morphological and physiological evaluations were conducted 65 days after planting. Seventy-three days after planting, 24 seedlings were submitted to herbivory, using the same methodology as the previous experiment with a quantitative differential of 10 bugs and a batch of 6 plants without insects (control). Evaluations were done 104 days after planting. Male adults (n = 5) of the P. torridus species caused a reduction in the growth and biomass increase in J. curcas seedlings 34 days after planting. After 30 days of herbivores, however the same injuries were not observed in seedlings with 73 days after planting. The injuries (34 days after planting) were considered mild and there was a decrease in the growth and in the biomass accumulation. Upon reaching 73 days after planting, the seedlings became more resistant to the attack of this pest, in such a way that as submitting them to twice the number of insects (n = 10), they did not negatively responded to the herbivory. Finally, the young seedlings were more susceptible to attack, even with low levels of infestation. The pest control should be done when there are signs of infestation at this stage. |
| Databáze: | OpenAIRE |
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