Rice safety and control of penoxsulam resistant and susceptible barnyardgrass (Echinochloa crus-galli) populations with soil-applied herbicides

2021 ◽  
pp. 1-26
Author(s):  
Tingting Liu ◽  
Jialin Yu ◽  
Jiapeng Fang ◽  
Liyao Dong
Keyword(s):  
Rice Fields ◽  
Shoot Biomass ◽  
Rice Varieties ◽  
And Control

Abstract Resistance to penoxsulam among barnyardgrass populations is prevalent in rice fields in China. Seeds of penoxsulam-resistant (AXXZ-2) and -susceptible (JLGY-3) barnyardgrass populations, as well as the seeds of two rice varieties including Wuyungeng32 (WY) and Liangyou669 (LY) were planted in plastic pots and then treated with a rate titration of acetochlor, anilofos, butachlor, clomazone, oxadiazon, pendimethalin, pretilachlor, pyraclonil, or thiobencarb. The two barnyardgrass populations exhibited similar susceptibility to acetochlor, anilofos, butachlor, oxadiazon, pretilachlor, or pyraclonil. However, the susceptibility differed between the barnyardgrass populations in response to clomazone, pendimethalin, and thiobencarb. For AXXZ-2, herbicide rates that caused 50% reduction in shoot biomass from the nontreated control (GR50) were 179, >800, and 1798 g ha-1 for clomazone, pendimethalin, and thiobencarb, respectively; while JLGY-3 GR50 values were 61, 166, and 552 g ha-1, respectively. Both rice varieties demonstrated excellent tolerance to acetochlor, butachlor, oxadiazon, pretilachlor, and thiobencarb. However, substantial rice damage was observed with anilofos and clomazone. Anilofos at 352 g ha-1 and clomazone at 448 g ha-1 reduced rice shoot biomass by 41 and 50% from the nontreated, respectively. Averaged across herbicide rates, clomazone reduced rice shoot biomass from the nontreated control by 52 and 34% for WY and LY, respectively; and pendimethalin reduced rice shoot biomass from the nontreated control by 25 and 9% for WY and LY, respectively.

Fasciola gigantica and Fasciola hybrids in Southeast Asia.

2021 ◽  
pp. 423-460
Author(s):  
Nichola Eliza Davies Calvani ◽  
Jan Šlapeta
Keyword(s):  
Life Cycle ◽  
Southeast Asia ◽  
Smallholder Farmers ◽  
Economic Importance ◽  
Fasciola Gigantica ◽  
Rice Fields ◽  
Control Options ◽  
And Control

Abstract This book chapter describes the life cycle of F. gigantica and its differences from F. hepatica, including its economic importance and control options available, with particular emphasis on the importance of the smallholder farmers and the role of rice fields in maintaining the life cycle in Southeast Asia.

scholarly journals Carbohydrate reserve and aerenchyma formation enhance submergence tolerance in rice

2016 ◽  
Vol 27 (3) ◽  
pp. 256-264
Author(s):  
MHR Pramanik ◽  
IJ Shelley ◽  
D Adhikary ◽  
MO Islam
Keyword(s):  
Plant Height ◽  
Stem Elongation ◽  
Normal Growth ◽  
Anatomical Structure ◽  
Aromatic Rice ◽  
Submergence Tolerance ◽  
Aerenchyma Formation ◽  
Rice Varieties ◽  
Carbohydrate Reserve ◽  
And Control

An attempt was made to evaluate the submergence tolerance in rice using four Aman rice varieties viz. FR13A (local flood resistant, check), BRRI dhan 51 (HYV flood tolerant, check), BR 5 (HYV, susceptible) and a local aromatic rice,Ukunimadhu (local susceptible). Twenty  days old seedlings of the rice varieties raised in earthen pots were submerged under 90 cm water depth in a submergence tank for 12 days and data were recorded on plant height, tiller number, carbohydrate reserve and internal anatomical structure of roots of the submerged and control (ambient) plants. Under submergence treatment Ukunimadhu showed rapid stem elongation with taller plants than the HYVs which showed shorter plant height. Tillering pattern was almost similar both in submergence treated and control plants in all the varieties. Variation in carbohydrate reserve was negligible among the varieties at ambient condition but the submergence treatment brought significant variation in carbohydrate content in them. Submergence treated FR13A and BRRI dhan 51 had the highest sugar and starch conservation ability while BR 5 and Ukunimadhu had the lowest. The higher reserved carbohydrate in the tolerant varieties might assist them to regenerate their normal growth rapidly after desubmergence. The cellular morphology of root tissue showed that intensity of aerenchyma development in submergence treated FR13A and BRRI dhan 51 was more pronounced compared to the local aromatic rice Ukunimadhu and perhaps this cellular large aerenchymatous development might be associated with the submergence tolerance of FR13A and BRRI dhan 51 than the local variety, Ukunimadhu.Progressive Agriculture 27 (3): 256-264, 2016

scholarly journals Physiological and Agronomic Responses of Four Rice Varieties to Drought in the Rainforest

2018 ◽  
Vol 10 (2) ◽  
pp. 220-227 ◽  
Author(s):  
Mamadou FOFANA ◽  
Lekan Suleiman SAKARIYAWO ◽  
Mauton O. POPOGBE ◽  
Akeem A. OYEKANMI ◽  
Jamiu O. AZEEZ ◽  
...  
Keyword(s):  
Water Deficit ◽  
Growth Stage ◽  
Upland Rice ◽  
Water Status ◽  
Block Design ◽  
Physiological Mechanism ◽  
International Institute ◽  
Reproductive Growth ◽  
Rice Varieties ◽  
And Control

The present investigation tested the hypothesis that there would be variation in physiological responses to water deficit among rice varieties from different production ecologies, with contrasting tolerance to water deficit under repeated cycle of soil moisture deficit, at reproductive growth stage. A screen house and a field trial were conducted at International Institute of Tropical Agriculture, Ibadan and Ikenne (Latitude 6° 52' N, Longitude 3° 43' E) respectively. Both experiments had rice varieties (‘IR 64’, ‘WAB 56-104’, ‘IR 77298-1-2-B-10’ and ‘NERICA 4’) and stress status (stress and control) as treatment factor’s, arranged in a randomised complete block design with three replicates. In both trials, the physiological mechanism that underpins varietal differences with repeated cycles of water deficit at the reproductive growth stage was more balanced water status, improved foliar characters, efficient photosynthetic capacity and higher grain yield in comparatively drought tolerant upland rice varieties (‘NERICA 4’ and ‘WAB 56-104’), as opposed with the results for the drought susceptible cultivar ‘IR 64’. A converse pattern was observed on water stressed rice, despite fewer cycles of water deficit on the field. The results could have suggested that the initiation of water deficit is the rate limiting step rather than its intensity at the reproductive growth stage.    

Kepelbagaian Artropod dalam Tanaman Padi Tradisional di Batang Lupar, Sarawak

2014 ◽  
Vol 70 (6) ◽  
Author(s):  
Mohd Fitri Masarudin ◽  
Maisarah Mohamad Saad
Keyword(s):  
Insect Pests ◽  
Diversity Index ◽  
Analysis Data ◽  
Shannon Index ◽  
Rice Fields ◽  
Rice Varieties ◽  
Stages Of Growth ◽  
Wiener Diversity Index ◽  
Insect Predators ◽  
Richness Index

The diversity of arthropod consists of pests and predators in rice fields were contribute to the biological control of crop pests at different stages of growth. The rice fields in Batang Lupar, Sarawak has diverse ecological conditions as well as presence of arthropod too. The study in MARDI research plot Batang Lupar in Sri Aman, Sarawak had been done on traditional rice varieties, Bubuk, Bali and Mamut by using sweeping net. The entire specimens were sorted out and classified into the smallest possible taxa. Statistical analysis were analysed by using Shanon-wiener Diversity Index, Evenness Shannon Index and Margalef Richness Index. A total of 272 individual arthropods had been collected and it consists of 7 order, 18 families and 23 species. Among of that 3 species are spiders, 9 species are insect pests and 11 species are insect predators. Analysis data for the diversity of arthropod has shown that there were no significantly different between three varieties, Bubuk, Bali and Mamut (P > 0.05). Besides that, diversity of the arthropod in Bali is higher than Bubuk and Mamut. 

scholarly journals Mechanistic understanding of iron toxicity tolerance in contrasting rice varieties from Africa: 2. Root oxidation ability and oxidative stress control

2020 ◽  
Vol 47 (2) ◽  
pp. 145
Author(s):  
Dorothy A. Onyango ◽  
Fredrickson Entila ◽  
James Egdane ◽  
Myrish Pacleb ◽  
Meggy Lou Katimbang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Sub Saharan Africa ◽  
Rice Varieties ◽  
Excess Iron ◽  
Improvement Programs ◽  
Sub Saharan ◽  
Breeding Efficiency ◽  
Biochemical Analyses ◽  
Fe Toxicity ◽  
And Control

To enhance breeding efficiency for iron (Fe) toxicity tolerance and boost lowland rice production in sub-Saharan Africa, we have characterised the morphological, physiological and biochemical responses of contrasting rice varieties to excess iron. Here, we report the capacity of four varieties (CK801 and Suakoko8 (tolerant), Supa and IR64 (sensitive)) to oxidise iron in the rhizosphere and control iron-induced oxidative stress. The experiments were conducted in hydroponic conditions using modified Magnavaca nutrient solution and 300 ppm of ferrous iron (Fe2+) supplied in the form of FeSO4. Severe oxidative stress was observed in sensitive varieties as revealed by their high levels of lipid peroxidation. Histochemical and biochemical analyses showed that tolerant varieties exhibited a better development of the aerenchyma and greater oxygen release than the sensitive varieties in response to excess Fe. Both suberin and lignin deposits were observed in the root, stem and leaf tissues but with varying intensities depending on the variety. Under iron toxic conditions, tolerant varieties displayed increased superoxide dismutase (SOD), glutathione reductase (GR), peroxidase (POX) and ascorbate peroxidase (APX) activities in both the roots and shoots, whereas sensitive varieties showed increased APX and catalase (CAT) activities in the roots. This study had revealed also that Suakoko8 mainly uses root oxidation to exclude Fe2+ from its rhizosphere, and CK801 possesses a strong reactive oxygen species scavenging system, in addition to root oxidation ability. Key traits associated with these tolerance mechanisms such as a well-developed aerenchyma, radial oxygen loss restricted to the root cap as well as strong activation of antioxidative enzymes (SOD, GR, POX and APX) could be useful selection criteria in rice varietal improvement programs for enhanced Fe toxicity tolerance.

IMPROVED EARLY SEASON MANAGEMENT OF SUB1 RICE VARIETIES ENHANCES POST-SUBMERGENCE RECOVERY AND YIELD

2018 ◽  
Vol 55 (1) ◽  
pp. 105-116 ◽  
Author(s):  
NINO P. M. BANAYO ◽  
RANEE C. MABESA-TELOSA ◽  
SUDHANSHU SINGH ◽  
YOICHIRO KATO
Keyword(s):  
Management Practices ◽  
Field Experiments ◽  
Transition Period ◽  
Management Practice ◽  
Recovery Period ◽  
Planting Density ◽  
Shoot Biomass ◽  
Seeding Rate ◽  
Rice Varieties ◽  
Conventional Practice

SUMMARYMore than 10 Sub1 rice varieties carrying the submergence-tolerance gene have been released for flood-prone environments in tropical Asia. Improved management practices have been shown to enhance yields of these varieties. The objective of this study was to dissect the growth response of IR64-Sub1 to integrated crop management in a flash flood at the late vegetative stage. Field experiments were conducted at the International Rice Research Institute, Philippines in the dry and wet seasons of 2013. Complete submergence was imposed for 14 days starting at 37 days after transplanting. Integrated management practice (IMP) consisting of: (i) application of fertilizer (compared with no fertilizer use in conventional practice), (ii) use of lower seeding rate (400 vs. 800 kg ha−1) in the nursery bed, (iii) use of slightly older seedling for transplanting (30 vs. 18 day-old), and (iv) higher planting density (33.3 vs. 25.0 hills m−2) gave yields higher by 8–87% compared with the conventional practice (1.3–2.4 t ha−1) in both seasons. This was attributable to higher shoot biomass after water recession, more tillers m−2, greater leaf area expansion and shoot biomass accumulation during the recovery period, and higher filled-grain percentage at maturity. The improved management had no positive effect on panicle formation, spikelets panicle−1, and harvest index since stress was imposed at the transition period between vegetative and reproductive phases. Our results suggest the appropriate nursery management, for submergence-resilient seedlings to further alleviate damage caused by flash floods and increase the yield of Sub1 varieties in flood-prone rainfed lowlands.

Effect of light and nitrogen supply on internal C:N balance and control of root-to-shoot biomass allocation in grapevine

2007 ◽  
Vol 59 (2) ◽  
pp. 139-149 ◽  
Author(s):  
I. Grechi ◽  
Ph. Vivin ◽  
G. Hilbert ◽  
S. Milin ◽  
T. Robert ◽  
...  
Keyword(s):  
Biomass Allocation ◽  
Nitrogen Supply ◽  
Shoot Biomass ◽  
And Control ◽  
Effect Of Light

Ecology and control of rice planthoppers in Fiji

1963 ◽  
Vol 54 (3) ◽  
pp. 467-481 ◽  
Author(s):  
Alden D. Hinckley
Keyword(s):  
Nilaparvata Lugens ◽  
Effective Control ◽  
Rice Seed ◽  
Sogatella Furcifera ◽  
Rice Varieties ◽  
Transplanted Rice ◽  
Rice Planthoppers ◽  
Controlled Flooding ◽  
Predatory Mirid ◽  
And Control

Observations were made in Fiji on the ecology and control of two Delphacid planthoppers on rice, Sogatella furcifera (Horv.) and Nilaparvata lugens (Stål), the latter species having apparently been responsible for a devastating outbreak in 1959. The studies covered three rice seasons, 1961, 1962, and 1963, most of the research being done at Koronivia in the south-eastern part of Viti Levu. Samples were taken of planthoppers and their natural enemies in dryland (drilled) and wetland (transplanted) rice, as well as in rice seed-beds and areas with grass or mixed rice and grass. Insecticides applied at standard dosages were tested against the planthoppers.It was shown that S. furcifera was most common on young rice and that N. lugens predominated on older rice. Sogatella kolophon (Kirk.), long placed in the genus Sogata and confused with Sogatella furcifera, was abundant only in grassy areas. Populations of N. lugens and, to a lesser extent, of S. furcifera, were apt to reach damaging levels on transplanted rice growing in pools of standing water after a dry period. In drilled fields, the predatory Mirid Cyrtorhinus lividipennis vitiensis Usinger provided effective control by destroying eggs of N. lugens, and, by the time the rice was six months old, it usually outnumbered the females of N. lugens. Parasitism of planthopper eggs by Mymarids, Trichogrammatids, and Eulophids was very low. Parasitism of adults of S. furcifera and S. kolophon by Elenchid Strepsipterons averaged about ten per cent, and that by Dryinid wasps less than one per cent. Adults of N. lugens were virtually free from parasitism but were sometimes infected by fungi. Factors influencing outbreaks are discussed. These include the amount of rainfall, the type of cultivation, the age of the rice crop, the species composition of the planthopper populations, and the relative abundance of Cyrtorhinus.Insecticidal concentrates tested against both S. furcifera and N. lugens included malathion 50 per cent, emulsifiable concentrate, diazinon 20 per cent, e.c., Bogor 30 per cent, e.c., DDT 20 per cent, e.c., dieldrin 15 per cent, e.c., and Sevin 80 per cent, wettable powder. Dieldrin-resistant strains of N. lugens appeared during 1961, the third season in which dieldrin and BHC had been widely used. The other five materials gave good results, DDT being the least expensive and the most persistent, although it took more than 24 hours to reduce the plant-hopper populations. It was concluded that rice should be closely watched from its third to the end of its sixth month and that 50 oz. of DDT 20 per cent. e.c. in 50 gallons of water per acre, or an equivalent formulation of some other insecticide, should be sprayed on the rice stems if the planthopper density should exceed 10 per stem. Other possible measures for controlling rice planthoppers would include the introduction of Dryinid wasps parasitising N. lugens, the development of rice varieties resistant to planthopper attacks, and the use of controlled flooding in high-bunded fields, but on present evidence the first two appear to hold little promise of success.

scholarly journals Perlindungan Lahan Sawah Dalam Pencapaian Ketahanan Pangan Nasional

2020 ◽  
Vol 13 (2) ◽  
pp. 29-41
Author(s):  
Sri Mulyani ◽  
Aqil Teguh Fathani ◽  
Eko Priyo Purnomo
Keyword(s):  
Food Security ◽  
Qualitative Methods ◽  
Rice Field ◽  
Rice Production ◽  
Rice Fields ◽  
Toll Roads ◽  
Sustainable Food ◽  
Field Function ◽  
And Control

Abstrak. Tujuan penelitian ini melihat ketahanan pangan berkelanjutan yang merupakan suatu kewajiban dan harus dilakukan untuk menjaga ketersediaan pangan khususnya padi. Pada saat ini di Sumatera Barat sedang maraknya terjadi alih fungsi lahan lawah. Alih fungsi lahan sawah ini disebabkan oleh pembangunan infrastruktur, perumahan, jalan, jalan tol, sarana umum dan fasiltas lainnya. Metode dalam penelitian ini menggunakan metode kualitatif dengan pendekatan rasionalistik. Hasil penelitian menyebutkan dengan adanya alih fungsi lahan sawah menyebabkan luas panen terhadap padi dan jumlah produksi padi terus berkurang. Pada tahun 2018 terjadi pengurangan luas panen dan produksi padi yang sangat signifikan dari tahun sebelumnya (2017) yaitu sebesar 220 ribu ha luas panen padi dan 1.4 juta ton produksi padi. Hal ini dinilai sangat berbahaya bagi ketahanan pangan yang berkelanjutan karena jumlah penduduk terus bertambah dan juga kebutuhan terhadap pangan juga semakin meningkat sedangkan jumlah produksi justru terus berkurang. Oleh karena itu perlu adanya peran dari semua unsur untuk mengkontrol dan mengendalikan lahan sawah serta pemerintah dengan segera membuat regulasi Peraturan Daerah untuk mengatur lahan sawah agar tidak terjadi alih fungsi lahan sawah secara berkelanjutan.Protection of Rice Fields in Achieving National Food SecurityAbstract. The purpose of this research is to see sustainable food security which is an obligation and must be done to maintain food availability, especially rice. The function of paddy fields is caused by the development of infrastructure, housing, roads, toll roads, public means, and other facilities. The methods in this study used qualitative methods with a rationalistic approach. The results of the study mentioned that the Land of rice field function caused the harvest area to rice and the amount of rice production continued to decrease. In 2018 there was a reduction in the vast harvest and rice production which was significantly from the previous year which amounted to 220 thousand hectares of rice harvest and 1.4 million tonnes of rice production. This is very dangerous for sustainable food security because the population continues to grow and also the need for food is also increasing while the number of production is steadily decreasing. Therefore, it is necessary to have the role of all elements to control and control the rice fields and government by immediately make the regulation of local regulations to regulate the field of rice fields to prevent the functioning of the rice field sustainability.

scholarly journals Water-efficient rice performances under drought stress conditions

2021 ◽  
Vol 6 (3) ◽  
pp. 838-863
Author(s):  
Didi Darmadi ◽  
◽  
Ahmad Junaedi ◽  
Didy Sopandie ◽  
Supijatno ◽  
...  
Keyword(s):  
Drought Stress ◽  
Water Use Efficiency ◽  
Water Use ◽  
Upland Rice ◽  
Stress Conditions ◽  
Root Anatomy ◽  
Shoot Biomass ◽  
Sensitivity Index ◽  
Rice Varieties ◽  
Use Efficiency

<abstract> <p>The use of varieties that are able to adapt well to extreme environments is one strategy to overcome the challenges of decreasing production in sub-optimal land. Indonesian tropical rice varieties (Jatiluhur, IPB 9G, IPB 3S, Hipa 19, Mentik Wangi, Ciherang, Inpari 17, and Mekongga) have been tested and established as water-used-efficient varieties in an optimal environment. However, to date, these varieties have not been examined in the suboptimal area, in particular, drought stress conditions. Therefore, this study aimed to evaluate the adaptation response of production, morphological, and physiological character of several water-efficient rice varieties under drought stress in the field. The study was designed in a split-plot with two factors and 4 replications, where the first factor (main plot) was drought stress stages i.e. vegetative (Dv), reproductive (Dr), generative (Dg), and control (Dc). The second factor was rice varieties, consisting of eight varieties, i.e., Jatiluhur, IPB 3S, IPB 9G, Hipa 19, Mentik Wangi, Ciherang, Inpari 17, and Mekongga. The experiment was conducted from May to December 2018 in Muneng Kidul Village, Probolinggo Regency, East Java Province. The experimental variables were morphology, production, leaf scrolling score during drought stress, drought sensitivity index, water use efficiency, physiology and root anatomy. The result showed that upland rice varieties were more tolerant to drought stress and had a higher water use efficiency than lowland rice varieties. This shows that Jatiluhur and IPB 9G which are indicated to be adaptive to drought stress, and have the ability to regulate water use more efficiently when drought stress occurs. Therefore, water use efficiency could be used as selection characters under drought conditions in rice particularly tropical upland rice. Moreover, morphological characters, i.e., grain yiled per plot, weight of pithy grain, weight of shoot biomass and weight of roots could be the selection characters to predict drought tolerant tropical rice. According to physiological characters, photosynthesis rate, transpiration rate, proline content, malondialdehyde content, leaf water potential and leaf greenness could be used as a selection tool to predict water use efficient genotypes in rice. However, further studies are needed to understand the complex mechanisms of water use efficiency by combining various approaches.</p> </abstract>

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