scholarly journals EFICIÊNCIA DE INSETICIDAS NATURAIS E TIAMETOXAM NO CONTROLE DE TRIPES EM VIDEIRA E SELETIVIDADE PARA INIMIGOS NATURAIS

2004 ◽  
Vol 14 ◽  
Author(s):  
LUIZ RONALDO NALI ◽  
FLÁVIA RABELO BARBOSA ◽  
CARLOS ALFREDO LOPES DE CARVALHO ◽  
JACKSON BONFIM CARVALHO DOS SANTOS
Keyword(s):  
Natural Enemies ◽  
Block Design ◽  
Field Conditions ◽  
Average Efficiency ◽  
Irrigated Area ◽  
Randomized Block Design ◽  
Untreated Check ◽  
Natural Insecticides

O objetivo deste trabalho foi avaliar a eficiência de produtos naturais e do tiametoxam no controle de tripes em videira e seus efeitos sobre inimigos naturais. O experimento foi instalado em plantio comercial, no município de Juazeiro-BA (Brasil), em parreiral da variedade Benitaka, com 5 anos de idade, irrigado por microaspersão. Adotou-se o delineamento experimental em blocos ao acaso, com 4 repetições e 5 tratamentos, sendo: 1. Nim-I-Go a 0,5%; 2. Rotenat a 0,5%; 3. Bio Alho a 0,3%; 4. tiametoxam 250WG (20 g de produto comercial/100L) e 5. testemunha (sem inseticida). Foram utilizadas 12 plantas por tratamento, sendo avaliados o número de tripes e de inimigos naturais por inflorescência, em pré-aplicação e aos 2, 4 e 6 dias após a aplicação dos inseticidas. Os produtos naturais Rotenat e Nim- I-Go apresentaram as melhores porcentagens médias de controle (respectivamente, 52,04% e 48,37%), seguidos pelo tiametoxam (46,00%) e pelo Bio alho (23,07%). Aos dois dias após a aplicação, o tiametoxam apresentou eficiência de 76,79%, porém não manteve a eficiência ao longo das avaliações. As notas na escala de seletividade para o Bio Alho, Nim-I-Go, Rotenat e tiametoxam foram 2 (pouco tóxico), 3 (moderadamente tóxico), 3 e 4 (tóxico), respectivamente. EFFICIENCY OF NATURAL INSECTICIDES AND THIAMETHOXAM ON THE CONTROL OF THRIPS IN GRAPES AND SELECTIVITY TO NATURAL ENEMIES Abstract The objective of this work was to verify the efficiency of natural insecticides and thiamethoxam on the control of Selenothrips rubrocinctus and Frankliniella sp. and their selectivity to natural enemies. The trial was conducted under field conditions, in an irrigated area of Juazeiro county, Bahia State, Brazil, in a five-years old vineyard with cv. Benitaka in a completly randomized block design with five treatments and four replicates. The treatments were: (1) Nim-I-Go 0.5%; (2) Rotenat 0.5%; (3) Bio Alho 0.3%; (4) thiamethoxam 250WG (20 g c.p./100 L of water) and the control (untreated check). There were twelve plants per treatment, being evaluated number of thrips and natural enemies, at inflorescences before application and 2, 4 e 6 days after application. Rotenat and Nim-I-Go were the most effective, respectively, 52.04% and 48.37% of control, followed by thiamethoxam (46.00 %) and Bio alho (23.07%). Two days after application the efficiency of thiamethoxam was 76.79%, however its average efficiency was low. The selectivity grades to Bio alho, Nim-I-Go, Rotenat and thiamethoxam were, respectively, 2 (slightly harmful, 3 (moderately harmful), 3 and 4 (harmful).

scholarly journals Manipulasi Mikrohabitat Dengan Sistem Tanam Polikultur Sebagai Stabilizer Ekosistem Untuk Pengelolaan Hama dan Musuh Alami Pada Tanaman Bawang Merah (Allium ascalonicum Linn.)

2019 ◽  
Vol 2 (2) ◽  
pp. 62
Author(s):  
Rizal Sukarno ◽  
Sigit Prastowo
Keyword(s):  
Natural Enemies ◽  
Block Design ◽  
Limiting Factor ◽  
Pest Population ◽  
Control Techniques ◽  
Randomized Block Design ◽  
Pest Insects ◽  
Different Types ◽  
Planting System ◽  
Better Than

Shallot (Allium ascalonicum Linn.) constitutes one of the commodities that has important meaning for Indonesian people with the limiting factor in the production is the pest attack. One of these pest control techniques is by controlling technical culture of polyculture planting system. This research was conducted in July to October 2019 which was located in Banyuputih Village, Wringin District, Bondowoso Regency. This study used a Randomized Block Design (RBD) with six treatment, namely: P1 = polyculture of shallot + Lemongrass; P2 = polyculture of shallot + celery; P3 = Polyculture of shallot + mustard; P4 = Polyculture of shallot + Lemongrass + mustard; P5 = Polyculture of shallot + celery + mustard; P6 = Monoculture of shallot. Each treatment was repeated 4 times. Observation started at 30 days after planting. Data collection was done by observing directly on the sample plants. Sampling was carried out using Yellow trap and pit fall trap. Samples were taken at each plot 10 times with intervals of 4 days. Observations included collecting the pest insects and natural enemies that were found, counting the number of populations in each species, scoring towards the damage plants. The results showed that shallot planting by polyculture with different types of plants affected the population of pests and natural enemies as well as the level of diversity of insects in shallots. Planting shallots by polyculture has been proven to control pest populations compared to planting shallots by monoculture. Polyculture planting with two types of plants proved to be better than polyculture planting with three types of plants where the best treatment was found in P1, namely polyculture of shallot and lemongrass with the smallest pest population which was 17.5.

scholarly journals Nitrogen and potassium fertilization in yield and macronutrients contents of heliconia cv. Golden Torch

2016 ◽  
Vol 20 (4) ◽  
pp. 337-342 ◽  
Author(s):  
Márkilla Z. Beckmann-Cavalcante ◽  
Genilda C. Amaral ◽  
Alcimar de S. e Silva ◽  
Leonardo P. da S. Brito ◽  
Augusto M. N. Lima ◽  
...  
Keyword(s):  
Block Design ◽  
Maximum Yield ◽  
Field Conditions ◽  
Potassium Fertilization ◽  
Randomized Block Design ◽  
One Year ◽  
K Fertilization

ABSTRACT This study aimed to evaluate the effect of nitrogen (N) and potassium (K) fertilization in yield and contents of macronutrients in heliconia plants (Heliconia psittacorum x Heliconia spathocircinata Aristeguieta) cv. Golden Torch. The experiment was set in a randomized block design, in a 4 x 4 factorial, corresponding to N doses (0, 120, 180 and 240 g of N hole-1) and K doses (0, 120, 180 and 240 g of K2O hole-1) with four replicates and five rhizomes per plot, under field conditions. After one year of cultivation, yield (number of flower stems per square meter) and the leaf contents of N, P, K, Ca, Mg and S were determined. The applied N doses did not influence either yield or the leaf contents of the evaluated macronutrients. K fertilization favored the increase in leaf K content and the decrease in the contents of P, Ca and Mg in leaves of heliconias. Under the conditions of this experiment, it is recommended to apply 161.46 g of K2O hole-1 for a maximum yield of 9.89 stems m-2 per month.

scholarly journals The Effect of Ammonium Nitrate Ratio and Support Types on the NPK Uptake and Growth of Black Pepper (Piper nigrum L.) in Field Conditions

Poljoprivreda ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 25-33
Author(s):  
Issukindarsyah Issukindarsyah ◽  
◽  
Endang Sulistyaningsih ◽  
DidikIndradewa Indradewa ◽  
Eka Tarwaca Susila Putra
Keyword(s):  
Plant Growth ◽  
Block Design ◽  
Dry Weight ◽  
Black Pepper ◽  
N Fertilizer ◽  
Field Conditions ◽  
Piper Nigrum ◽  
Pepper Plant ◽  
Randomized Block Design ◽  
Npk Uptake

The study’s objective was to determine the effect of the NO3-: NH4+ratio and types of support on NPK uptake and pepper plant growth in field conditions. The study used a completely randomized block design with three replications. The first factor was the type of support, being the deadwood and living supports in the form of Gliricidia sp. and Ceiba pentandra. The second factor was the ratio of N fertilizer forms, which were 100% NO3-, 100% NH4+, 50% NO3-:50% NH4+, 75% NO3-:25% NH4+ and 25% NO3-:75% NH4+. The results have demonstrated that the uptake of N, P, and K, as well as the plant growth, were not affected by the interaction of the N fertilizer form ratio with the types of support. In field conditions, the black pepper prefers the N fertilizer in the form of 50% NO3-:50% NH4+. The pepper plants that were given N fertilizer in a combination of 50% NO3-:50% NH4+ have demonstrated an N, P, and K uptake, and morphology and plant dry weight were higher than the ratio of other forms of N fertilizers.

scholarly journals Manipulation of microhabitat by polyculture planting system as ecosystem stabilizer for management of pests and natural enemies in shallot (Allium ascalonicum Linn.)

2020 ◽  
Vol 1 (1) ◽  
pp. 33
Author(s):  
Sigit Prastowo ◽  
Rizal Sukarno
Keyword(s):  
Data Collection ◽  
Natural Enemies ◽  
Block Design ◽  
Pest Population ◽  
Randomized Block Design ◽  
Pest Insects ◽  
Different Types ◽  
Planting System

Shallot (Allium ascalonicum Linn.) is one of important commodities for Indonesian people, yet its production is still limited by pest attack This research was conducted in Banyuputih Village, Wringin Subdistrict, Bondowoso Regency from July to October 2019. This study applied a Randomized Block Design (RBD) with six treatments, namely: P1 = Polyculture of shallot + lemongrass; P2 = Polyculture of shallot + celery; P3 = Polyculture of shallot + mustard; P4 = Polyculture of shallot + lemongrass + mustard; P5 = Polyculture of shallot + celery + mustard; P6 = Monoculture of shallot. Each treatment was repeated 4 times. Observation was started when plant was at the age of 30 days after planting. Data collection was done by directly observing the sample plants. Sampling was carried out using Yellow trap and pit fall trap. A total of 10 samples were collected from each plot with interval of 4 days. Observation included collecting the pest insects and natural enemies that were found, counting the number of populations of each species, and scoring towards the damage plants. The results showed that shallot planting by polyculture with different types of plants affected the population of pests and natural enemies as well as the level of diversity of insects in shallots. Planting shallots by polyculture has been proven to control pest population compared to planting shallots by monoculture. Polyculture planting with two types of plants was found to produce better outcome than polyculture planting with three types of plants with best treatment observed in P1, namely polyculture of shallot and lemongrass which resulted in the lowest pest population of 17.5.

Artan Dozlarda Magnezyum Sülfat Uygulamalarının Tütün Bitkisinin Yaprak Verimi ve Kalitesine Etkisi

2021 ◽  
Vol 9 (3) ◽  
pp. 601-606
Author(s):  
Ahmet Kınay ◽  
Halil Erdem
Keyword(s):  
Block Design ◽  
Field Conditions ◽  
Leaf Quality ◽  
Tobacco Leaves ◽  
Nicotine Concentration ◽  
Randomized Block Design ◽  
Leaf Yield ◽  
Tobacco Cultivar ◽  
Harvest Maturity

This research was carried out to determine the effects of fertilizers with MgSO4 applied in the increasing amounts (0, 3, 6 and 9 kg da-1) on the leaf yield, leaf quality and some chemical (Mg, S, N, P, K, nicotine, sugar, chlorogenic and rutin concentration) parameters of tobacco in the field conditions of Tokat/Erbaa and Tokat/Kazova locations in 2017 year. The research was established in three replications according to the randomized block design, and the leaves that reached the harvest maturity were harvested in three hands. According to the results, with increasing doses of MgSO4 application, there was an increase in the leaf yield of the tobacco cultivar grown in Erbaa and Kazova locations. The increase in leaf yield was seen at the dose of 6 kg da-1 of MgSO4 and this increase was 22% in Erbaa location and 6.4% in Kazova location. It was observed that increasing MgSO4 applications caused statistically significant increases in leaf Mg and S concentrations, and the highest increase was observed in the leaf yield at a dose of 6 kg da-1. Nicotine concentration, which is a very important alkaloid component for tobacco, caused a decrease in both locations with MgSO4 application. The results revealed that increasing doses of MgSO4 caused an increase in the yield of tobacco leaves, an increase in leaf Mg and S concentrations, and a decrease in nicotine concentrations.

scholarly journals Yield and phenology of yam as affected by the physiological rest period of seed-rhizomes

2008 ◽  
Vol 26 (2) ◽  
pp. 154-157
Author(s):  
Ademar P de Oliveira ◽  
Márcio F de Moura ◽  
Edna U Alves ◽  
Anarlete U Alves ◽  
Arnaldo Nonato P de Oliveira ◽  
...  
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Rest Period ◽  
Field Conditions ◽  
Average Mass ◽  
Rest Periods ◽  
Randomized Block Design

The objective of this work was to evaluate the effects of the rest period of seed-rhizomes in the phenology and yield of yam Da Costa (Dioscorea cayennensis). The experiment was carried out in field conditions at the Federal University of Paraíba, in Areia, Brazil, from January to December 2004, in an Ustpsamment soil. A completely randomized block design was used to test three treatments, 60-, 80-, and 100-day seed-rhizome rest periods, with seven replications. Plant emergency was evaluated every ten days from 40 to 90 days after planting (DAP), as well as plant height, evaluated up to 80 DAP. The average mass of commercial rhizomes and the yield of commercial and seed-rhizomes were also assessed. At 40, 50, and 60 days after planting, plant emergency was superior for seed-rhizomes submitted to 100-day rest periods. At 70 and 80 DAP, there were no significant differences. At 90 DAP, seed-rhizomes that rested for 60 and 100 days provided around 91 and 83% of plant emergency, respectively. Concerning plant height, seed-rhizomes that rested 100 days produced the tallest plants. The average mass of commercial rhizomes and the yield of commercial and seed-rhizomes were 1.22 kg, 13.1 t ha-1, and 7.7 t ha-1, respectively, for seed rhizomes submitted to 60-day rest periods. For 100-day rest period rhizomes, the average mass of commercial rhizomes and the yield of commercial and seed-rhizomes, were 0.73 kg, 7.7 t ha-1, and 1.7 t ha-1, respectively.

Evaluation of Herbicides for Control of Annual Weeds in Asparagus (Asparagus officinalis)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 474c-474
Author(s):  
Gerardo Martinez Diaz ◽  
Arturo Lopez Carvajal ◽  
Grijalva Contreras R. Leonel
Keyword(s):  
Block Design ◽  
The Other ◽  
Field Conditions ◽  
Asparagus Officinalis ◽  
Plant Toxicity ◽  
Randomized Block Design ◽  
Annual Weeds

This research was conducted under field conditions in 1993 with a cooperative farmer with the aim of evaluating the effects of herbicides for the control of annual weeds (pre-emergence). The herbicides and rates (a.i./ha) applied were: Diuron 2.4 and 1.2 L, Linuron 1.5 and 0.7 L, Metribuzin 1.4 and 0.7 L, Simazina 1.5 L, Trifluralin 1 L and Naptalam+ Bensulide 4+3 L and 2+2 L. Two check plots were also included, one free of weeds and the other with weeds. A randomized block design was used with four replicates. The experimental units were 4.5 × 10-m plots. Trifluralin showed 56% of control and Naptalam+ Bensulide exhibited 24% at both rates, while Diuron (97% to 100%), Linuron (87% to 96%), Metribuzin (96% to 100%), and Simazina (96%) showed the best controls with either doses; of these, Linuron at 0.7 L/ha registered the lowest control (87%). None of the herbicides evaluated showed any plant toxicity.

scholarly journals Produção de feijão-caupi e gergelim consorciado com mamoneira no Semiárido paraibano

2017 ◽  
Vol 12 (1) ◽  
pp. 01 ◽  
Author(s):  
Guilherme de Freitas Furtado ◽  
Anielson dos Santos Souza ◽  
Rodolfo Rodrigo de Almeida Lacerda ◽  
Lúcia Helena Garófalo Chaves ◽  
José Raimundo de Sousa Júnior ◽  
...  
Keyword(s):  
Castor Bean ◽  
Yield Components ◽  
Block Design ◽  
Field Conditions ◽  
Semiarid Region ◽  
Experimental Plot ◽  
Experimental Systems ◽  
Randomized Block Design ◽  
Experimental Trials

<p>Objetivou-se avaliar os componentes de produção do feijão-caupi e gergelim, consorciado com a mamoneira no semiárido paraibano. O experimento foi desenvolvido no período de março a novembro de 2011 em condições de campo em Pombal, Paraíba. Realizou-se sob delineamento experimental em blocos ao acaso com três sistemas de cultivo em dois ensaios experimentais: feijão-caupi (cv. BRS Novaera) e gergelim (cv. BRS Seda) em monocultivo, consórcio com mamona cv. IAC 2028 e consórcio com mamona cv. BRS Nordestina, com 4 repetições, totalizando 12 parcelas experimentais em cada ensaio. O consórcio com a mamoneira reduz os componentes de produção e produção do feijão-caupi e gergelim, sendo a cv. BRS Nordestina mais competitiva. Considerando as variáveis estudadas, a melhor opção para cultivo consorciado do feijão-caupi ou gergelim na região é a cv. IAC 2028.<strong> </strong></p><p align="center"><strong><em>Production of cowpea and sesame intercropped with castor bean in semiarid region of Paraiba</em></strong><strong><em></em></strong></p><p><strong>Abstract</strong><strong>: </strong>The objective was to evaluate yield components of cowpea and sesame grown as secondary crops, intercropping with castor bean in the semiarid region of Paraiba. The experiment was carried out from March to November 2011 under field conditions in Pombal, Paraíba state. Three experimental systems were used in a randomized block design in two experimental trials: cowpea (cv. BRS Novaera) and sesame (cv. BRS Seda) in monoculture, intercropping with castor bean cv. IAC 2028 and intercropping with castor bean cv. BRS Nordestina, with 4 replicates, totaling 12 experimental plot in each trial. The intercrop with castor bean reduces yield components and yield of cowpea and sesame, with an cv. BRS Nordestina more competitive. Considering the variables studied, the best option for intercropping cowpea or sesame in the region is the cv. IAC 2028.</p>

scholarly journals Performance of Cucumber Cultivars at Low Hill During Summer-Rainy Seasons

2006 ◽  
Vol 27 ◽  
pp. 169-171
Author(s):  
MD Sharma ◽  
SP Bhattarai
Keyword(s):  
Key Words ◽  
Rainy Season ◽  
Block Design ◽  
Field Conditions ◽  
Commercial Variety ◽  
Marketable Yield ◽  
Randomized Block Design

This experiment was conducted in randomized block design with three replications in the farmers' field conditions at Yampaphant, Tanahun during April - July 2000. The cultivars included in this study were one commercial namely Bhaktapur Local and the four exotic cultivars and hybrids namely Malini, Korean White, Japanese Green and Green Long. The hybrid Malini was found significantly more vigor and earlier (first picking at 42 days) and produced significantly higher number of fruits (252 thousands/ha) and significantly higher yield (69.6 t/ha). The commercial variety Bhaktapur Local remained androecious and did not produce fruit when grown during summer -rainy season. Key words: Cucumber, summer-rainy season, marketable yield J. Inst. Agric. Anim. Sci. 27:169-171 (2006)

Doses, methods and times of application of boron in soybean under field conditions

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Renan Cesar Dias Da Silva ◽  
Geovani Soares da Silva Junior ◽  
Adilson Pelá ◽  
Regina Maria Quintão Lana ◽  
José Geraldo Mageste Da Silva
Keyword(s):  
Boric Acid ◽  
Field Experiments ◽  
Foliar Application ◽  
Block Design ◽  
Growing Season ◽  
Field Conditions ◽  
Randomized Block Design ◽  
Great Productivity ◽  
Cropping Seasons ◽  
Number Of Seeds

The boron (B) fertilization in soybean is important to ensure great yields. Boron correction must be applied in deficient soils repairing losses, exports and leaching. The objective of this study was to evaluate the effects of doses, methods and times of application of B in soybean B content and yield. The field experiments were conducted during the 2015/16 and 2016/17 cropping seasons and set as a randomized block design with nine treatments (0, 0.5, 1, 1.5, 2 kg ha-1 of B, 0.5 kg ha-1 of B mixed with NPK (02-28-18) in furrow during sowing, foliar application with 0.3 kg ha-1 of B in V4 soybean stage, foliar application with 0.3 kg ha-1 of B in R1 soybean stage, and foliar application of 0.15 kg ha-1 in V4 plus 0.15 kg ha-1 of B in R1 soybean stage) and four replications. Boric acid was the B source and the variables analyzed were: B leaf content, B exported in seeds, number of pods per plant, number of seeds per pod, weight of 100 seeds (g) and productivity (kg ha-1). The levels of B in leaf were between 30.1 and 43.8 mg kg-1 and between 65.0 and 92.6 mg kg-1 in the 2015/16 and 2016/17 growing season, respectively. Exports of B in seeds were estimated between 166 and 248 g ha-1 and between 208.9 to 260.8 g ha-1 in the 2015/16 and 2016/17 growing season, respectively. Great productivity (3,820 kg ha-1) was observed in the 2016/17 growing season, with an estimated dose of 0.95 kg ha-1 of B.

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