scholarly journals Some Notes on the Ecology of Root Aphids Injurying Upland Rice Crop, with Special Reference to Ants Attending Them

1957 ◽  
Vol 1 (2) ◽  
pp. 135-139 ◽  
Author(s):  
Hidetsugu ISHIKURA ◽  
Yosiaki ITO ◽  
Kazuyoshi MIYASHITA ◽  
Yoshinobu ITO
Keyword(s):  
Special Reference ◽  
Upland Rice ◽  
Rice Crop

scholarly journals Floristic and Phytosociology of Weeds in Upland Rice in the Humid Tropics

2018 ◽  
Vol 35 (0) ◽  
Author(s):  
M.R.M. SILVA ◽  
E.A. COSTA ◽  
M.J.P. CORRÊA ◽  
A.A.C. RODRIGUES ◽  
M.L.R. MESQUITA
Keyword(s):  
Weed Management ◽  
Upland Rice ◽  
Management Strategies ◽  
Floristic Composition ◽  
Humid Tropics ◽  
Reproductive Stage ◽  
Rice Crop ◽  
Weed Species ◽  
Floristic Similarity ◽  
Abstract Knowledge

ABSTRACT: Knowledge of the floristic composition and vegetation structure are essential conditions for development of more efficient and economic weed management strategies in crops in the humid tropics. The objective of the research was to carry on floristic and phytosociological surveys to know the main weeds in upland rice fields in the humid tropics of the Brazilian State of Maranhão. Weed samples were done by means of an open metal rectangle of 0.15 m2 thrown at random in the vegetative and reproductive stages of rice crop in 2009/10 and 2010/2011 harvest. A total of 65 species from 23 families was identified 35 (53.85%) from the eudicotyledons botanical group, 29 (44.06%) from the monocotyledonous and one (1.53%) belonged to the pteridophytes. The most representative families were from the monocotyledonous botanical group including Poaceae and Cyperaceae, followed by Amaranthaceae and Malvaceae, both from the eudicotyledons group. The weed species with higher importance values in the upland rice crop vegetative stage were Urochloasp., Panicumsp., C. flavus, C. benghalensis and C. argutus whereas in the reproductive stage the higher importance values were recorded for S. latifolia, C. argutus, L. octovalvis, A.tenella and P.maximum. The most important weeds in the crop vegetative phase were mainly from the monocotyledonous group, while in reproductive one they were the eudicotyledons. Weed diversity was high and the floristic similarity was lower in the vegetative one compared to the reproductive stage of upland rice cultivation in the humid tropics.

scholarly journals Reports of new wing color polymorphism and taxonomic information to cercopids (Auchenorrhyncha: Cercopidae) from upland rice crop, Pará State, Brazil

2018 ◽  
Vol 78 (4) ◽  
pp. 728-735 ◽  
Author(s):  
A. Paladini ◽  
A. C. Domahovski ◽  
D. Krinski ◽  
L. A. Foerster
Keyword(s):  
Upland Rice ◽  
Color Polymorphism ◽  
Rice Fields ◽  
Rice Crop ◽  
Correct Identification ◽  
Color Patterns ◽  
Future Studies ◽  
Rice Pests ◽  
Bright Color ◽  
First Time

Abstract Cercopidae is one of the largest families of the spittlebug superfamily Cercopoidea. Most spittlebugs species are characterized by bright color patterns. Thus, this study evaluated for the first time the Cercopidae species collected in rice crops, Novo Progresso, Pará state, Brazil. Insects were collected weekly between November/2010 and March/2011 from areas without (WA) and with agrochemical applications (AA). Four species were recorded: Deois incompleta (Walker, 1851) (71 specimens in WA area and 50 in AA area); Mahanarva spectabilis (Distant, 1909) (39 specimens in WA area and 39 in AA area); Mahanarava tristis (Fabricius, 1803) (26 specimens in WA area and 20 in AA area); Zulia pubescens (Fabricius, 1803) (11 specimens in WA area and four in AA area). The species collected displayed pronounced color polymorphism when compared with the color patterns of the same species from other regions. This makes correct identification more difficult for these species. Therefore, taxonomic and diagnostic informations provided in this study will help in the correct identification, control and monitoring of these insects in future studies. Besides that, we recommend monitoring in rice fields and further study of the biology and ecology of cercopids in Brazil to assess the potential of these species as rice pests.

Management of Meloidogyne graminicola and yield of upland rice in South-Luzon, Philippines

Nematology ◽  
2003 ◽  
Vol 5 (6) ◽  
pp. 879-884 ◽  
Author(s):  
Imelda Soriano ◽  
Georges Reversat
Keyword(s):  
Rice Yield ◽  
Upland Rice ◽  
Rice Crop ◽  
Yield Potential ◽  
Root Knot Nematode ◽  
Short Life ◽  
Meloidogyne Graminicola ◽  
Asian Rice ◽  
Rice Yields ◽  
Single Rice

AbstractMeloidogyne graminicola, the rice root-knot nematode, has become a constraint on Asian rice production due to rice cropping intensification and increasing scarcity of water. This work relates to the assessment of crop rotation, fallow and nematicide treatments in naturally infested fields to manage M. graminicola populations and prevent yield losses. One or two consecutive crops of cowpea or seasons of fallow before a rice crop lowered nematode populations and improved rice yield by 30-80%. Methyl bromide was used to determine yield potential and almost eradicated the nematode, trebling rice yield. Carbofuran improved yield of the first rice crop but did not affect the second rice crop. Due to its short life cycle, M. graminicola populations were similar after only a single rice crop and after three consecutive crops. It is recommended that, to ensure higher rice yields, M. graminicola populations should be maintained at low density by non-host crop rotations or fallows, ideally for two seasons before planting rice.

scholarly journals KETERSEDIAAN P, SERAPAN P DAN SI OLEH TANAMAN PADI GOGO (Oryza sativa. L) PADA LAHAN ULTISOL YANG DIAPLIKASIKAN SILIKAT DAN PUPUK FOSFAT

2018 ◽  
Vol 8 (2) ◽  
pp. 9 ◽  
Author(s):  
Zulputra Zulputra ◽  
Nelvia Nelvia
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Phosphate Fertilizer ◽  
Rice Crop ◽  
Rice Plants ◽  
Randomized Design ◽  
Two Factors ◽  
Completely Randomized Design ◽  
Four Levels

The research was conducted from  August 2014 to Januari 2015 in the Ultisol Land, Pematang Berangan Village, Rokan Hulu Regency, Riau Province. The study aims to determine the availability of P, P and Si uptake by upland rice plants granting silicate and phosphate fertilizer on Ultisol land. The form of this research is experimental factorial completely randomized design consist of two factors. The first factor is silicate consists of four levels (0, 50, 75, and 100 kg SiO2/ha), while the second factor is phosphate fertilizer consists of four levels (0, 36, 54, and 72 kg P2O5/ha), each combination was repeated three times. The results showed that administration of silicates and phosphates increase the availability of P, P and Si uptake of upland rice crop. Giving of 100 kg SiO2 and 36 kg P2O5 per hectare increase  uptake of P and Si, each respectively increased by 208 % and 218 % compared without silicates and phosphates fertilizer.

scholarly journals EXOGENOUS APPLICATION OF VITAMINS IN UPLAND RICE

2019 ◽  
Vol 6 (2) ◽  
pp. 1-6
Author(s):  
Eduardo Pradi Vendruscolo ◽  
Aliny Heloísa Alcântara Rodrigues ◽  
Paulo Ricardo Oliveira ◽  
Rodrigo Andrade Leitão ◽  
Luiz Fernandes Cardoso Campos ◽  
...  
Keyword(s):  
Beneficial Effect ◽  
Grain Yield ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
Foliar Spray ◽  
Rice Crop ◽  
Exogenous Application ◽  
Rice Plants ◽  
Seed Soaking

Vitamin application can optimize plant growth and grain yield of rice crop due to its beneficial effect on many plant physiological characteristics. The present study was conducted to evaluate the effects of niacin and thiamin applied as seed soaking or foliar spray on the morphological and productive characteristics of upland rice crop (Oryza sativa L., cv. Primavera), grown under greenhouse conditions. The experiment was arranged in a randomized block design in a 4 x 2 factorial scheme, with four replicates. The treatments consisted of the application of vitamins (control; 200 mg L-1 thiamin; 200 mg L-1 niacin; and 100 mg L-1 thiamin + 100 mg L-1 niacin) and two application methods (seed soaking and foliar spraying). Morphological and productive characteristics of the rice plants were evaluated. The exogenous application of thiamin and niacin, regardless of the application method, has a beneficial effect on the growth of upland rice plants, but does not increase the grain yield of the crop.

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