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All Journal Planta Tropika INJURITY: Journal of Interdisciplinary Studies
Nurhidayat, Setia P.
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Education Engineering Public Health Social Sciences

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Goatweed Flower Extract (Ageratum conyzoides L.) as A Botanical Insecticide for Pest Control Crocidolomia binotalis Z. Nurhidayat, Setia P.; Rusdi, Nurul; Ulinuhayani, Muhammad; Singgih, Bambang; Triono, Budi
PLANTA TROPIKA Vol 12, No 2 (2024)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v12i2.16425

Abstract

Crocidolomia binotalis Z. is an important cabbage plant pest in Indonesia. Nevertheless, pest control strategies depend on synthetic pesticides, negatively impacting ecosystems.Therefore, developing an effective organic pesticide approach to controlling C. binotalis is necessary. This research aimed to test the effectiveness of goatweed flower extract (Ageratum conyzoides L.) in controlling pest C. binotalis. The research consisted of two sets of experiments with two methods: the stomach and contact poison. Each experimental set was arranged in a completely randomized design (CRD) with three replications. The treatments were six levels of extract concentration at 0%, 15%, 30%, 45%, 60%, and 75%. The results showed that the application of A. conyzoides flower extract using the stomach and contact poison methods significantly increased the percentage of larval mortality 24 hours after application (haa) and the percentage of total larval mortality. The flower extract treatment of A. conyzoides significantly reduced the percentage of leaf area eaten, increased larval mortality, inhibited pupation and imago emergency, and shortened the larval stage's duration. The percentage of larval mortality through contact poison was higher than stomach poison.
Residual Effect of NPK Fertilizer towards Plant Growth and Corm Yield of Indonesian Konjac (Amorphophallus muelleri Blume) on Vertisol Soil Singgih, Bambang; Soedarjo, Muchdar; Rusdi, Nurul; Ulinuhayani, Muhammad; Nurhidayat, Setia P.
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 4 No. 6 (2025): INJURITY: Journal of Interdisciplinary Studies
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v4i6.1455

Abstract

Indonesian konjac (Amorphophallus muelleri Blume) naturally grows on forest under the shade of the trees. However, this crop has become an important commercial tuber crop due to the whay the  tuber crops, Indonesian konjac has been cultivated by employing the relatively high input in cultural practices, especially the use of fertilizer. NPK fertilizer has been commonly used to cultivate Indonesian konjac to produce high yield of corm. The present study was undertaken to evaluate the residual effect of NPK fertilizer on growth and corm yield of Indonesian konjac. Vertisol soil previously unfertilized (A), previously fertilized with 100 kg NPK/ha (B) and previously fertilized with 200 kg NPK/ha (C) were used to grow Indonesian konjac. The Indonesian konjac grown on each soil (A, B or C) was fertilized with 0 kg NPK/ha, 150 kg NPK/ha and 300 kg NPK/ha. Thus, the study used 9 treatments, and each treatment was replicated three times. All data obtained were analyzed by employing the standard deviation from 3 replicates. The results of the present study revealed that NPK fertilizer addition did not increase plant height, shoot diameter, shoor dry weight, corm diameter, corm thickness and corm fresh weight of Indonesian konjac grown on Vertisol soil previously unfertilized, previously fertilized with 100 kg NPK/ha or previously fertilized with 200 kg NPK/ha. Thus, the results of the present study suggest that Vertisol soil is fertile and addition of NPK fertilizer is not necessary to grow this kind of konjac.
Co-Authors Muchdar Soedarjo Nurul Rusdi Singgih, Bambang Triono, Budi Ulinuhayani, Muhammad