Tuba root (Derris elliptica Benth) flour extract concentration assay to control the corn cob borer (Helicoverpa armigera Hubn.)

Abstract

Pests that attack the corn crop are cob borers (Helicoverpa armigera Hubner). The pest control can be done using tubal root botanical insecticide (Derris elliptica Benth.). This study aims to obtain the best concentration of tuba root powder extract in controlling the corn cob borer pests H. armigera. Research has been carried out at the Plant Pest Laboratory of Agriculture Faculty, University of Riau. This study used a completely randomized design (CRD) with 6 treatments and 4 replications. The treatments given were several concentrations of tuba root powder extract, namely 0 gr.l−1 of water, 20 gr.l−1 of water, 40 gr.l−1 of water, 60 gr.l−1 of water, 80 gr.l−1 of water and 100 gr.l−1 of water. The parameters observed were initial death, lethal time 50, lethal concentration 50 and 95, daily mortality and total mortality. Daily mortality data obtained from the results of the study were analyzed descriptively and displayed in graphical form, data lethal concentration (LC50 and LC95) were probit analyzed using the POLO-PC program, while other data such as initial death, total mortality, lethal time (LT50), statistically analyzed using a variance. Data from analysis of variance will be continued using the smallest significant difference (LSD) test at the 5% level. The application concentration of tuba root extract with 100 g.l-1 of water is the best concentration to control larvae of H. armigera with an initial time of death 26.50 hours, 67.50 hours of LT50, highest daily mortality on the fourth day by 40% and total larval mortality by 87.5%.

Potential of tuba plant root (Derris elliptica) as a vegetable pesticide ingredient: A review

“…Pest control can be controlled by using vegetable insecticides tuba root (Derris elliptica Benth.) [5].…”

“…The control of borer pests on corn cobs has been carried out with several concentrations of tuba root powder extract, namely 0 g/l water, 20 g/l water, 40 g/l water, 60 g/l water, 80 g/l water and 100 g/l water, and showed different effects for each concentration on the cob borer (Helicoverpa armigeran Hubner). The use of tuba root powder extract with a concentration of 100 g/l water is the best concentration to control cob borers (Helicoverpa armigeran Hubner) with an initial mortality time of 26.50 hours, LT50 67.50 hours and total larval mortality of 87.5% [5].…”

“…One of the uses of plant-based poisons of the tuba root type containing rotenone is to eradicate wild fish, as well as other nuisance pests that can affect the fish production process, without having to cause damage to the environment as an effect of the use of these plant-based chemicals [4]. In addition to being used to eradicate wild fish and nuisance pests in fish, tuba roots containing rotenone can be used as an exterminator of corn cob borers [5], effective for killing cat lice [6], as a pesticide to eradicate rice snails [7], as an environmentally friendly insecticide to control caterpillar populations [8]. Based on this background, the purpose of this review is to provide an overview of the potential use of rotenone extract from tuba root as a vegetable pesticide.…”