[EFFICACY OF PAPAYA LEAF EXTRACT IN CONTROLLING COTTON APHID DURING VEGEATIVE GROWTH STAGE OF EGGPLANT]. Cotton aphid (Aphis gossypii Glover) can cause serious economic losses in the eggplant production. The application of synthetic pesticides can be effective in controlling the pest but it may not be the best solution for the human health and environment. Botanical pesticides have long been known for their potential as the alternative to synthetic pesticides for crop protection with reduced risk to human health and environmental hazard. Objective of this study was to compare the efficacy of papaya leaf extract solutions in controlling cotton aphid and their effect on the vegetative growth of eggplant. Papaya leaf extract solutions differing in concentration (0%, 10%, 20%, 30%, 40%, and 50%) were sprayed onto aphid infested eggplants to observe the insect mortality, crop damage, and the lethal concentration at LC50 and LC90. The mortality of aphid was significantly increased following the application of papaya leaf extract, with the highest mortality (91.33%) was found on the concentration of 50%. The lethal concentrations of the extract causing 50% (LC50) and 90% (LC90) aphid mortality were 9.98% and 41.99%, respectively. As compared to the control treatment, the crop damage was significantly reduced by the application of the papaya leaf extract solution.
The objectives of the research were to study the shift of weed compositions in sweet corn field treated with organic compost and chemical weed controls and to compare the effect of treatment combinations on weed growth, weed biomass and sweet corn biomass. The research was conducted in Bengkulu, Indonesia, from April to July 2014. Results showed that the number of weed species decreased after the trials from 14 to 13. There was a shift in weed compositions because 5 species of weeds did not emerge after the trials, but 4 new species were found. Chemical weed control used a herbiside mixture of atrazine and mesotrione applied during postemergence was the most effective method to control weeds, which was observed on decreased weed emergence and weed biomass down to 22.33 and 25.00 percent of control, respectively. Subsequently, biomass production of sweet corn increased up to 195.64 percent at the same trials. Biomass of weeds and sweet corn were also affected by the organic composts. Weed biomass was inhibited by treatment of composted empty fruith bunches of oil palm, whereas significantly increased of sweet corn biomass were observed in the plots of organic manure.
Usaha sampingan strategis masyarakat seperti ternak unggas dan ikan telah terbukti mampu menopang perekonomian masyarakat desa dan perkotaan, namun kondisi ini mengalami penurunan dan bahkan cendrung ditinggalkan karena terbatasnya sumber pakan alami serta mahalnya harga pakan dampak dari naiknya nilai tukar rupiah dan perubahan iklim yang ekstrim. Salah satu usaha mengatasi permasalah tersebut adalah dengan introduksi pemanfaatan potensi sumberdaya lokal yaitu biokonversi limbah pertanian milik masyarakat desa melalui program Pengabdian pada Masyarakat (PPM). Kegiatan PPM dilakukan dari bulan Juli ̶ Agustus 2019 di Desa Lawang Agung, Kecamatan Air Periukan, Kabupaten Seluma yang merupakan desa binaan Jurusan Perlindungan Tanaman, Fakultas Pertanian, Universitas Bengkulu. Hasil kegiatan PPM ini telah mampu melatih para petani muda usia 18 ̶ 45 tahun dalam memanfaatkan sampah loading ramp pabrik kelapa sawit dan limbah batang jagung untuk media budidaya maggot Hermetia. Meskipun paket teknologi PkM telah diketahui oleh 50% peserta sebelum program dimulai, namun tidak satupun peserta yang pernah mencobanya. Daya serap teknologi dan kemampuan praktek peserta sangatlah tinggi yaitu berurutan mencapai 93% dan 100%. Ketertarikan peserta untuk menerapkan usaha mencapai 80%. Masalah gender ditemukan dalam program penerapan iptek ini yaitu peserta wanita kurang tertarik untuk melanjutkan budidaya maggot Hermetia karena bentuknya yang tidak disukai.
Crocidolomia binotalis Zell is an important pest in Brassicaceae vegetable crops. Vegetable insecticide is one potential alternative to controlling the pest. This study aims to determine the application time of noni fruit extract and to determine the effective concentration of noni fruit extract as a vegetable insecticide in controlling C. binotalis larva on cabbage plants in the field. this study used a Completely Randomized Design (RAL) consisting of two treatment factors and four replications. The first factor is the concentration of extract (5 ppm, 10 ppm, 15 ppm and 20 ppm) and the second factor is the time of application of vegetable pesticide before the pest is invested (W1) and after the pest is invested (W2). So there are 32 units of experiments and 4 units of experiments added as control. The results showed, noni fruit extract had no significant effect on mortality of C. binotalis larvae. The highest mortality rate is at 100% K2 (10ppm) concentration at the time of application before the pest is invested (W1). The interaction had significant effect on the wet weight of the plant canopy but had no significant effect on the mortality of the pest, the intensity of the attack, the percentage of pupa formed, and the present percentage of imago.
[THE EFFECTIVENESS Jatropha curcas (L.) LEAF EXTRACTS IN INHIBIT ROOT-KNOT NEMATODE (Meloidogyne spp.) INJURIES ON TOMATO]. One of the main problems in tomato cultivation is the attack of root purse nematodes (Meloidogyne spp.). Some methods of controlling Meloidogyne spp. which can be done including using plants as vegetable nematicides. This study aims to get the concentration of Jatropha leaf extract which is effective in inhibiting the Meloidogyne spp attack on tomato plants. This study used 48 plants, 24 plants for observation 35 days after planting and 24 plants for observation until the age of 77 days after planting. This study used a Completely Randomized Design (CRD) with the treatment of Jatropha leaf extract concentrations (0%, 10%, 20%, 30%, 40%, 50%), and repeated four times. The results showed Jatropha curcas extract in inhibiting the attack of root purse nematodes (Meloidogyne spp.) can maintain plant height, fruit number, fruit weight, and plant stover wet weight 35 days after planting, but no significant effect on stover wet weight plants 77 days after planting and dry weight of plant stover 35 days after planting and 77 days after planting. The concentration of Jatropha leaf extract tends to increase the concentration, the smaller the rate of infection and the population of Meloidogyne spp on tomato plants. The concentration of Jatropha leaf extract 35% - 45% is the optimum concentration in inhibiting Meloidogyne spp. on tomato plants.
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