Diversity and Composition of Hymenoptera Around Tidal Swamp Rice In Indragiri Hilir District, Indonesia

Pest attacks on rice plants can cause a detrimental decrease in production. Hymenoptera has many important roles in ecosystems, including as parasitoids and predators of pests. The purpose of this study was to determine the presence of Hymenoptera around tidal swamp rice in Indragiri Hilir Regency, Indonesia. Sampling used four traps, namely: 1) swing net; 2) yellow pan trap; 3) malaise trap; and 4) pitfall traps. The analysis was carried out by calculating the Shannon-Wiener diversity index (H'), the Margalef species richness index (D), the Pielou species evenness index (J). Hymenoptera found around tidal swamp rice areas of Indragiri Hilir Regency were 15.253 Hymenoptera insects consisting of 11 superfamilies, 37 families, and 304 morphospecies. Hymenoptera parasitoid had the highest diversity index value (4,80), followed by Hymenoptera pollinator (3,13) and Hymenoptera predator (3,11). The number of species of Hymenoptera parasitoid, pollinator, and predator obtained was 243; 31 and 76 species. The high diversity of Hymenoptera around tidal agricultural land optimizes its ecological role in the rice plantation ecosystem.

Reflections

This experimental ekphrastic essay meditates on the history of eighteenth-and nineteenth-century rice plantation slavery from the ecocritical perspective of the bobolink, or rice bird. The vignettes of a postbellum image of a Georgia plantation reveal the many facets of this avian migrant’s entanglement with Indigenous histories of wild rice and with Black labour and performance. Weaving in contemporary art and music, this essay explores how a prized songbird—and agricultural pest—developed its grain diet and flight patterns in tandem with the growth of plantation capitalism across the Americas and the Atlantic world.

Insecticide Resistance in Anopheles Albitarsis S.S. From a Rice Production Field, With the First Record of Kdr Mutation in This Species

Background: Although there is a vast literature concerning insecticide resistance (IR) in Plasmodium vectors from African and Asian continents, similar studies with Neotropical anophelines are scares. Herein we evaluated the IR profile of Anopheles albitarsis s.s. of a laboratory colony and a natural population collected around a rice plantation field. The laboratory colony is original from a collection performed in this same region more than two decades ago. Methods: We collected An. albitarsis females while resting after blood feeding, around rice field plantations in Massaranduba, SC, Brazil. These females laid their eggs in the laboratory, and the larvae were raised in parallel with our lab colony. To be sure about the field samples’ taxonomic status, we amplified and sequenced the mitochondrial COI gene of a sampling of field captured mosquitoes. We performed a simplified knockdown test with larvae exposed to permethrin and deltamethrin and submitted adult females to a WHO like tube test with the pyrethroids permethrin, deltamethrin, and etofenprox, in addition to the organophosphate malathion. A segment of the voltage-gated sodium channel gene (NaV) was amplified and cloned. Based on the observed sequences, we developed a TaqMan genotyping assay for the variation L1014F and calculated the genotypic and allelic frequencies concerning this SNP in the field population.Results: The COI analyses confirmed the taxonomic status of An. albitarsis s.s in laboratory and field samples. The field population was resistant to pyrethroids but not to malathion. We observed the substitutions L1019R, F1020S, and the classical kdr L1014F in the NaV gene. This classical kdr allele was present under low frequencies in the overall field population (2%), although more frequent in pyrethroid-resistant insects.Conclusions: The An. albitarsis s.s. population from Massaranduba was resistant to pyrethroids, likely due to selection pressure exerted by agrochemical pesticides. We registered the classical kdr mutation in a Brazilian Anopheles species for the first time. Further investigations are necessary to disclose additional resistance mechanisms.

Alginate encapsulation of Trichoderma harzianum against brown spot disease on rice (Oryzae sativa) in vivo assays

Bipolaris oryzae causes brown spot disease which is one of the most devastating diseases in rice. Nowadays, biological methods are effective controls which need to be developed in order to use less chemical control. Therefore, the objectives of the present study were to characterize the B. oryzae as a biocontrol agent and to measure the performance of encapsulated T. harzianum in controlling brown spot disease. Bipolaris oryzae was characterized based on morphological characteristics and alginate encapsulation was produced from conidial suspension by adding sodium alginate and calcium chloride which results in small beads. Alginate formulation was applied to the rice seedling to find the result on this formulation. As a result, the application of encapsulation T. harzianum to control brown spot disease showed the inhibition of the disease. As a conclusion, this can be an alternative method to control brown spot disease which will render easier application to rice plantation in the future.

Survey of Rice Pests, Diseases and Natural Enemies on “Upsus” Program in Karawang District, West Java Province

"Upsus" (Special Efforts) Program is a program to increase crop production and productivity to support the acceleration of food self-sufficiency held by the government. The targets are to increase the planting index (IP) by 0.5 and productivity by 0.3 ton/ha/Harvested Dry Grain (HDG). Increased productivity has not been reached optimally. This research aimed to determine the number/types of the dominant pests and natural enemies, and pests and diseases attack rates in the wetland rice plantation "Upsus" Program in Karawang District. Direct observation was carried out on four stages of plant development, in the nursery stage (10–14 days after sowing) 200–300 m², seedlings stage (10–20 days after planting), vegetative stage (5–6 weeks after planting), and reproductive stage (1–2 weeks after flowering) respectively within an area of 2000 m². Twenty samples were observed in the nursery stage and 50 samples in the following stages. The dominant pests and diseases found were Nilaparvata lugens, Leptocarisa oratorius, Schirpophaga incertulas, Cnaphalocrocis medinalis, Scotinophara coarctata, Mythimna separata, bacterial leaf blight (Xanthomonas. oryzae pv. oryzae), blast (Pyricularia grisea) and narrow brown spot (Cercospora oryzae). The recorded dominant natural enemies were Cyrtorhinus sp., Paederus sp., Tetragnatha sp., and Pardosa pseudoannulata. S. incertulas showed the highest attack intensity and the highest disease severity was found in bacterial leaf blight. The largest population of dominant pests and natural enemies was found in the generative stage. The high application of pesticides affected the population of pests, natural enemies, and the level of pest and disease attacks.

PRESERVING PEGON: A CASE STUDY ON KAMPUNG SANTRI TARJUMAH IN TAMBANGSARI, PATI REGENCY-CENTRAL JAVA

The manuscript is written to portray a hamlet which formed pesantren (Islamic Boarding School) in which the santri (students) consists of santri mukim (students staying in boarding school) from various regions and santri kalong (local residents) and in which there is a mosque, a boarding school, an Al-Quran educational park, a madrasah diniyah, houses of clerics (in one settlement of village), the learning system of bandongan using the Tarjumah Book with Pegon-language written by KH Ahmad Rifa'i. The action of K. Rifai against Dutch colonialism was known as the Rifaiyah movement, his resistance with the movement of writing the Book of Tarjumah which contained Tawheed, Fiqh, and Sufism written in Pegon. Pegon was a resistance form against colonial Latin writing. Until now it was continued by his santri in the village where he lived serving as the cleric of Islamic Boarding School. The location of this research is in Tambangsari Hamlet, Kedungwinong Village, Sukolilo District, Pati Regency, Central Java. The data were obtained from January to June 2019 through interviews and observation with a descriptive qualitative approach. This hamlet of rice plantation and palawija (secondary crops) has formed a specialty called the tarjumah santri village. The successor generation of K. Rifai’s student who introduced the Book of Tarjumah in Tambangsari Hamlet was K.Hannan and it is now continued by his grandson. The learning of the Tarjumah Book had formed a distinctive hamlet community, namely dukuh santri. The obedience in worship with the knowledge of Islamic religion through the tradition of learning the Salaf Tarjumah across ages and genders and with the behavior in life adhering to Islamic law has been a social reality.

CORRELATION OF UAV-BASED MULTISPECTRAL VEGETATION INDICES AND LEAF COLOR CHART OBSERVATIONS FOR NITROGEN CONCENTRATION ASSESSMENT ON RICE CROPS

Fertilizer application is a crucial farming operation for regulating crop health thus crop yield. Optimal fertilizing doubles agricultural production subsequently raising farmers’ income, food security and economic agriproducts. To optimize the application of fertilizers, initial monitoring of the current nutrient status of the crops is required. This research will focus on Nitrogen (N), the most extensive fertilizer nutrient in crop cultivation. Conventional N monitoring involves the use of Leaf Color Charts (LCC) wherein leaf color intensity is associated with the N content of the crops. Despite its ability to quantify the optimal amount of needed fertilizers, the LCC method requires extensive on-site labor and lacks accuracy. This study developed a method that incorporates capabilities of Unmanned Aerial Vehicles (UAVs) equipped with a multispectral sensor in N monitoring specifically in rice crops, a major agricultural product in the Philippines. In situ N level information collected through LCC was correlated with remote sensing data, particularly vegetation indices (VIs) extracted from UAV multispectral imagery of a rice plantation in San Rafael, Bulacan. Several VIs sensitive to crop N content were tested to determine which has the highest correlation with the LCC data. Through Pearson correlation and regression analysis, NDVIRed Edge was found to be the most strongly correlated with LCC data suggesting its potential in mapping variability in fertilizer requirements. An equation modelling LCC observations and NDVIRed Edge values that estimates the N levels of an entire rice plantation was generated along with the N concentration map of the study area.

KAPABILITAS ORGANISASI DINAS PERTANIAN TANAMAN PANGAN BAGI PENINGKATAN PRODUKSI KOMODITAS PADI DI KABUPATEN SUBANG TAHUN 2016-2018

The organizational capability of the Local Office of Agriculture and Food Plantation for improving the rice commodity production in Subang Regency year 2016-2018 had not been suitable yet with the plan of the Local Government of Subang Regency as regulated in the Local Regulation No. 14/2014 concerning the Local Middle Term Development Plan of Subang Regency Year 2014-2018 in order to increase the rice commodity production from 1.1 million ton to 1.6 million ton. The aim of this research is to describe the organizational capability of the Local Office of Agriculture and Food Plantation for improving the rice commodity production. The method of this research is descriptive. This research uses the primary and secondary data. The data of this research is qualitatively analyzed. The results of this research indicate that the organizational capability for improving the rice commodity production could not develop the new irrigation and optimize the rice field land yet. Moreover, the rice plantation time planned three times a year was not achieved because of the lack of water supply. Consequently, the achievement of rice commodity production in last 2018 was only 1.3 million ton. The knowledge and skills of the civil servants at field could not be practiced yet. The organizational capability had not been suitable yet with the program of irrigation reconstruction and the supporting infrastructures. Therefore, the Local Office of Agriculture and Food Plantation and other local organizations related to the agricultural sector had not optimally co-operated yet.Keywords: Organizational Capability, Rice Commodity, Agriculture and Food Plantation.