Effectiveness Test of Soursop Leaf Extract and Papaya Leaf Extract Combination Against <i>Spodoptera litura</i> on Chili Plants in Tobelo City

Abstract

In terms of control, various natural chemical compounds derived from plants can be used. Like papaya and soursop leaves, the formulation of the problem is whether the combination of soursop leaf extract and papaya leaf extract is effective in controlling S. litura pests and what is the most effective extract concentration. This study used a completely randomized design (RBD) with 5 treatments and 5 replications. Observation variables included symptoms, morphological changes and mortality, the results were analyzed by Analysis of Variance (ANOVA) followed by the Least Significant Difference (LSD) 5% test. The initial symptoms that were seen one day after application of the combination were morphological changes in the test larvae. Such as damage to the body of the larva, change in color, then the larva's body shrinks, when touched the larvae easily fall. The highest mortality was found at the extract concentration of 20% with a mortality rate of 64.79% on the second day. The results showed that the high mortality rate was closely related to the high toxicity contained in the 20% extract concentration. It was concluded that the results of the effectiveness test of the combination of papaya leaf extract and soursop leaf extract were effective. Suggestions for the use of natural materials that are easily available can be used as an alternative to control pests that are environmentally friendly. Furthermore, it is suggested that if you want to increase mortality, you can try increasing the extract concentration.

The effectiveness Assay of Vegetable Pesticides Papaya and Mahogany Leaf Extracts in Pest Control of Spodoptera exigua (Lepidoptera: Noctuidae) on Onion (Allium ascalonicum L) Cultivation

“…Tannins are also repellent to insects so that they can be used as a form of plant defense (Manikome & Handayani, 2020). The lowest mortality percentage was 27.50% with the 30% concentration of mahogany leaf extract vegetable pesticide treatment (Table 2).…”

Inventory of Chili Pests and Diseases in Kabandungan Sub-District, Sukabumi Regency

“…Control of S. litura and gemini virus vectors can use biological control agents such as Beauveria bassiana and Metarhizium anisopliae (Zulfitri et al, 2020). Other controls that can also be applied include using botanical insecticides (Manikome & Handayani, 2019) or by using synthetic insecticides with various active ingredients. Control of the C. capsici pathogen can be done by arranging planting distances so that the spread of the pathogen can be reduced, using biological control agents such as Trichoderma spp.…”

Bioactivity of extracts from Syzygium aromaticum, Annona muricata, and Piper retrofractum against Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae)

“…Acetogenin inhibits the NADPH enzyme in the mitochondria so that the energy in the cell stops then causes death [6,25,37]. High concentrations of A. muricata leaf extract caused the feeding activity of S. litura larvae has to be stop until death [26].…”