Characterization of whitefly (Bemisia tabaci) as geminivirus vector based on RAPD-PCR. The variation of whitefly was performed by the appearance of population having diferent DNA sequence. PCR-RAPD and dendogram was expected to be used to investigate the variation of whitefly in Sumatera. Morphological observation on the whitefly colleted from field area showed that the geminivirus-transmitting vector was Bemisia tabaci with varied population. Based on PCR-RAPD and dendogram analysis in Sumatera, it was known that Bemicia tabaci had a high variation both intra and inter field area.
Abstract. Prasetyo J, Ginting C, Akin HM, Suharjo R, Niswati A, Afandi A, Adiwijaya R, Sudiono, Nurdin M. 2021. The effect of biological agent and botanical fungicides on maize downy mildew. Biodiversitas 22: 1652-1657. This study was conducted to evaluate the effect of the combination of Trichoderma asperellum and mycorrhizae with botanical fungicides made from betel leaf extract or turmeric extract against maize downy mildew. The study used a randomized complete block (RCB) design with three replications. The treatments applied were: single applications of T. asperellum (Ta); arbuscular mycorrhizal fungi (AMF); turmeric extract (T); betel extract (B); the combination of T. asperellum and AMF (TaM); turmeric extract and T. asperellum (TTa); turmeric extract and AMF (TM); turmeric extract + T. asperellum + AMF (TTaM); betel extract + T. asperellum (BTa); betel extract + AMF (BM); betel + T. asperellum + AMF (BTaM); and Control (C). The observed variables were disease incidence, incubation period, and shoot dry weight. The data were analyzed using ANOVA. Differences between treatments were tested by the LSD test at 5% significance level. The results showed that the combination of botanical fungicides with biological agents could reduce the incidence of downy mildew, extend the incubation period, and increase the dry weight of corn shoots. The best combination treatment was achieved from the combination of T. asperellum with betel extract. There was a synergistic effect between botanical fungicides and biological agents in reducing the disease incidence.
Relationship between Bemisia tabaci Genn. and Yellow Diseases of Chilly in West Lampung. The objective of this research was to find out the relationship between population of Bemisia tabaci and yellow disease incidence of chilly that was conducted in West Lampung. The result showed that the population of B. tabaci affected the disease incidence. Higher population of B. tabaci was followed by high disease incidence. The result also showed that high population of B. tabaci was affected by the rainfall intensity.
The objective of this research was to formulate a policy strategy for integrated pest management by using SWOT AHP methods (case study on vegetable cultivation in Lampung Province). This method used A’WOT; the combination of AHP (Analytical Hierarchy Process) analysis and SWOT (Strength-Weakness-Opportunity-Threat) analysis. The analysis result showed the main strength factors becoming the base for sustainable agricultural business were the availability of good structures and infrastructures both in production and marketing, and the availability of sufficient production structure (seeds) with good quality and quantity. The weakness factors becoming concern were dominantly lack of institutional funding (capital) for vegetable business, many problems in the integrated pest management (IPM) technology implementation stage, many problems in good agriculture practices (GAP), and numbers of families making their life as farmers. The opportunity factors were the availability of IPM and GAP technologies, growing campaign for consuming domestic products reducing import, and high government commitment to improve vegetable farmers’ welfare. The threats to concern were no protection operational base and farmer’s empowerment, very few institutional funding (capital) for vegetable business, and many problems in the GAP and technology implementation. Six strategies becoming priority in order were drafting the regulation and standard of operation that regulate IPM and GAP implementations; strengthening farmer’ institution, capital and agricultural insurance; drafting legality of operational protection and farmer’s empowerment; agricultural intensification in order to improve quantity, quality, safety, and environmental insight for food security and independency; optimization of technology transfer by socialization or education of IPM and GAP for vegetable crops; and inexpensive IPM system based controlling technology development and effective and efficient of alternative production structures.
Pepaya merupakan tanaman yang dapat dimanfaatkan sebagai fungisida nabati. Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak daun pepaya terhadap pertumbuhan Colletotrichum gloeosporioides secara in-vitro dan intensitas penyakit antraknosa pada buah pepaya secara in-vivo. Penelitian disusun dalam rancangan acak lengkap yang terdiri atas tujuh perlakuan dan empat ulangan. Data yang diperoleh dianalisis dengan sidik ragam selanjutnya nilai tengah dibandingkan dan diuji dengan uji beda nyata terkecil pada taraf 5% dan uji polinomial pada taraf 5%. Hasil penelitian menunjukkan pengaruh yang nyata dari ekstrak daun pepaya dan fungisida sintetik dalam menghambat pertumbuhan koloni C. gloeosporioides, keterjadian penyakit, dan laju perkembangan penyakit antraknosa pada buah pepaya. Ekstrak daun pepaya menunjukan pola yang linier dari hasil uji polinomial terhadap diameter koloni C. gloeosporioides dan laju perkembangan penyakit. Ekstrak daun pepaya menghambat pertumbuhan koloni jamur C. gloeosporioides pada 2 sampai 7 hsi (hari setelah inokulasi), keterjadian penyakit pada 5 dan 6 hsa (hari setelah aplikasi), maupun laju perkembangan penyakit antraknosa pada buah pepaya. Tetapi ekstrak daun pepaya tidak menghambat kerapatan spora, perkecambahan spora, dan keparahan penyakit.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.