Propiedades insecticidas del polvo de Laurelia sempervirens L. para el control de Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae)

Sitophilus zeamais is a key pest of stored cereals. The insecticidal properties of Laurelia semper v irens powder against S. zeamais were assessed in laboratory. The variable evaluated were morta lity of adult insects by contact and fumigant toxicity, mortality of immature insects by contact toxicity, residual effect of powder stored under environmental or refrigerated conditions, adult insect em ergence (F1), repellency and weight reduction and ger mination of maize. The concentrations evaluated were 0, 0.25, 0.5, 1.0, 2.0 and 4.0% and the experimental design was completely randomly. In contact toxicity bioassay all treatments showed mortality over 90% while fumi gant activity did not exceed 40%. The F1 only was registered in treatment of 0.25% and control showing all other treatments 0%. In immature control bioassay all treatments exhibited statistical differences with control. The storage of powder under refrigerated cond itions not improved the resid ual effect. All concentrations of powder assessed showed repellence. Germination and grain weight loss of maize seeds not showed significant differences with control. We concluded that L. sempervirens has promissory perspectives to stored grain pests contr ol

GIBERELINAS, CITOCININAS Y PROTECTOR FLORAL EN LA CALIDAD DE LA FLOR DE ROSAL (Rosa x Hybrida)

The traditional system to produce flower buds of cut rose is inefficient in the producing areas of the state of Mexico, since very few of them achieve a high quality. The present work had the objective of evaluating the use of floral protectors alone or with phytohormones (gibberellins or cytokines) to increase the quality of the floral bud. The flowering protector prevented the entry of thrips to the floral button and increased the quality of the floral button in both the Black Magic variety and the Polo. The floral protector alone and with gibberellins contributed to promote the quality of the floral button. The cytokinins used to inhibit both the floral bud and the floral protector increased the floral bud quality at an optimal dose of 0.001 mg * L-1. However, doses equal to or greater than 100 mg * L-1 damaged the floral structure.El sistema tradicional para producir botones florales de rosa de corte es ineficiente en las zonas productoras del estado d Mexico, ya que muy pocos de ellos logran una alta calidad. El presente trabajo tuvo el obejtivo de evaluar el uso de protecotres florales solos o impreganados con fitohormonas (giberelinas o citocinias ) para aumentar la calidad del boton floral. El protector florar impidio el ingreso de trips al boton floral e incremento la calidad del boton floral tanto en la variedad Black Magic como en la Polo. El protector floral solo y con giberelinas contribuyo a auamnetar la calidad del boton floral. Las citocininas utilizadas para impegnar tanto el boton floral como el protector floral aumentaron la calidad del boton floral en dosis optima de 0,001 mg*L-1 sin embargo, dosis iguales o mayores de 100mg*L-1 danaron la estructura floral

Resistencia de cuatro poblaciones del acaro (Tetranychus urticae Koch) a propargite en rosa de corte (Rosa x hybrida) en el Estado de México, México

The red spider, Tetranychus urticae Koch., Is one of the most important plagues of the cut rose, (Rosa x hybrida), in the State of Mexico and its combat is realized mainly by the use of acaricides like the propargite; Which the producers initially used with satisfactory results and currently does not control this pest. In order to estimate the level of resistance to this acaricide, in 2007 its response to this acaricide was evaluated in populations from Coatepec Harinas, Tenancingo, Villa Guerrero and Zumpahuacán, State of Mexico. At least 4000 nymphs and 2,000 adults were harvested from each locality under greenhouse cutting and reproduced until F1 to perform the bioassays. The range of doses that eliminated 0 to 100% of treated individuals (biological window) was determined. Subsequently, five to seven concentrations covering this range were included. Five replicates were performed four on different consecutive days. Red spider populations from Coatepec Flour (RR95 = 7.9 ×), Villa Guerrero (RR95 = 1.3 ×) and Zumpahuacán (RR95 = 11 ×) are considered susceptible to propargite; While the population of Tenancingo (RR95 = 90.1 ×) is considered resistant to this acaricide.La araña roja, Tetranychus urticae Koch., es una de las plagas más importantes de la rosa de corte, (Rosa x hybrida), en el Estado de México y su combate se realiza principalmente mediante el uso de acaricidas como el propargite; mismo que los productores usaron inicialmente con resultados satisfactorios y actualmente no controla esta plaga. Con el objetivo de estimar el nivel de resistencia a dicho acaricida, en el año 2007 se evaluó su respuesta a dicho acaricida en poblaciones provenientes de Coatepec Harinas, Tenancingo, Villa Guerrero y Zumpahuacán, Estado de México. De cada localidad se recolectaron al menos 4 000 ninfas y 2 000 adultos en el cultivo de rosa de corte bajo invernadero y se reprodujeron hasta F1 para realizar los bioensayos. Se determinó el rango de dosis que eliminaba el 0 a 100% de los individuos tratados (ventana biológica). Posteriormente se incluyeron de cinco a siete concentraciones que cubrieron dicho rango. Se realizaron cinco repeticiones cuatro en días consecutivos diferentes. Las poblaciones de araña roja provenientes de Coatepec Harinas (RR95= 7.9×), Villa Guerrero (RR95=1.3×) y Zumpahuacán (RR95= 11×) se consideran susceptibles a propargite; mientras que la población de Tenancingo (RR95 = 90.1×) se considera resistente a dicho acaricida

The Road to the WTO twelfth Ministerial Conference: A Latin American and Caribbean perspective

The context in which international food trade takes place has changed considerably since the last Ministerial Conference (MC11) in 2017. Significant progress has not been achieved in many import-ant issues that are still pending on the organization’s agenda. Moreover, geopolitical changes and the Covid-19 pandemic have drastically impacted the institutional priorities of countries and the WTO it-self. The global economy has substantially deteriorated over the past two years, with structural impacts in the areas of trade and food security, particularly for Latin America and the Caribbean (LAC). The multilateral trading system and its main organization, the WTO, have come under attack and are being discredited. The possibility of advancing towards coordinated solutions to major global issues through multilateral cooperation seems unlikely.Countries have adopted a wide range of strategic decisions to respond to the effects of this situation on international trade and agriculture. Many have revised their trade policies to adjust them to different scenarios with respect to food security and agricultural trade flows. The surge in commodity prices and a fear of food shortages have led some governments to apply restrictive measures that limit or tax agricultural exports. Other measures adopted include direct market interventions through public stock holdings, special safeguard mechanisms, and state trading enterprises. The adoption of these measures has triggered new debates on their effectiveness in reducing food insecurity and propelling the development of fair and transparent food markets.Regulations such as sustainability standards, access restrictions or domestic support measures must be transparent and aligned with WTO principles to avoid discretionary applications and discrimina-tory practices. Information transparency is key to access and develop new markets, especially under growing environmental scrutiny. Effective market access is crucial, not only for the development of agro-exporting countries (which prioritize this issue on their development agendas) but also for importing countries, as a means of guaranteeing food security and connecting main suppliers with buyers in regions facing food shortages.The WTO dispute settlement mechanism has become a strategic asset for developing countries, enabling them to continue expanding their agricultural exports and strengthening their position in the market. However, the current state of paralysis of the WTO Appellate Body has recently affected the institution’s effectiveness in regulating and arbitrating conflicts in the area of food trade relations. Most importantly, the growth strategy of Latin American countries depends on the WTO and the legal order that it enforces; therefore, actively contributing to its modernization and prioritizing its success as part of their trade and foreign policies is of crucial importance

Global variation in postoperative mortality and complications after cancer surgery: a multicentre, prospective cohort study in 82 countries

© 2021 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 licenseBackground: 80% of individuals with cancer will require a surgical procedure, yet little comparative data exist on early outcomes in low-income and middle-income countries (LMICs). We compared postoperative outcomes in breast, colorectal, and gastric cancer surgery in hospitals worldwide, focusing on the effect of disease stage and complications on postoperative mortality. Methods: This was a multicentre, international prospective cohort study of consecutive adult patients undergoing surgery for primary breast, colorectal, or gastric cancer requiring a skin incision done under general or neuraxial anaesthesia. The primary outcome was death or major complication within 30 days of surgery. Multilevel logistic regression determined relationships within three-level nested models of patients within hospitals and countries. Hospital-level infrastructure effects were explored with three-way mediation analyses. This study was registered with ClinicalTrials.gov, NCT03471494. Findings: Between April 1, 2018, and Jan 31, 2019, we enrolled 15 958 patients from 428 hospitals in 82 countries (high income 9106 patients, 31 countries; upper-middle income 2721 patients, 23 countries; or lower-middle income 4131 patients, 28 countries). Patients in LMICs presented with more advanced disease compared with patients in high-income countries. 30-day mortality was higher for gastric cancer in low-income or lower-middle-income countries (adjusted odds ratio 3·72, 95% CI 1·70–8·16) and for colorectal cancer in low-income or lower-middle-income countries (4·59, 2·39–8·80) and upper-middle-income countries (2·06, 1·11–3·83). No difference in 30-day mortality was seen in breast cancer. The proportion of patients who died after a major complication was greatest in low-income or lower-middle-income countries (6·15, 3·26–11·59) and upper-middle-income countries (3·89, 2·08–7·29). Postoperative death after complications was partly explained by patient factors (60%) and partly by hospital or country (40%). The absence of consistently available postoperative care facilities was associated with seven to 10 more deaths per 100 major complications in LMICs. Cancer stage alone explained little of the early variation in mortality or postoperative complications. Interpretation: Higher levels of mortality after cancer surgery in LMICs was not fully explained by later presentation of disease. The capacity to rescue patients from surgical complications is a tangible opportunity for meaningful intervention. Early death after cancer surgery might be reduced by policies focusing on strengthening perioperative care systems to detect and intervene in common complications. Funding: National Institute for Health Research Global Health Research Unit

Effects of hospital facilities on patient outcomes after cancer surgery: an international, prospective, observational study

© 2022 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 licenseBackground: Early death after cancer surgery is higher in low-income and middle-income countries (LMICs) compared with in high-income countries, yet the impact of facility characteristics on early postoperative outcomes is unknown. The aim of this study was to examine the association between hospital infrastructure, resource availability, and processes on early outcomes after cancer surgery worldwide. Methods: A multimethods analysis was performed as part of the GlobalSurg 3 study—a multicentre, international, prospective cohort study of patients who had surgery for breast, colorectal, or gastric cancer. The primary outcomes were 30-day mortality and 30-day major complication rates. Potentially beneficial hospital facilities were identified by variable selection to select those associated with 30-day mortality. Adjusted outcomes were determined using generalised estimating equations to account for patient characteristics and country-income group, with population stratification by hospital. Findings: Between April 1, 2018, and April 23, 2019, facility-level data were collected for 9685 patients across 238 hospitals in 66 countries (91 hospitals in 20 high-income countries; 57 hospitals in 19 upper-middle-income countries; and 90 hospitals in 27 low-income to lower-middle-income countries). The availability of five hospital facilities was inversely associated with mortality: ultrasound, CT scanner, critical care unit, opioid analgesia, and oncologist. After adjustment for case-mix and country income group, hospitals with three or fewer of these facilities (62 hospitals, 1294 patients) had higher mortality compared with those with four or five (adjusted odds ratio [OR] 3·85 [95% CI 2·58–5·75]; p<0·0001), with excess mortality predominantly explained by a limited capacity to rescue following the development of major complications (63·0% vs 82·7%; OR 0·35 [0·23–0·53]; p<0·0001). Across LMICs, improvements in hospital facilities would prevent one to three deaths for every 100 patients undergoing surgery for cancer. Interpretation: Hospitals with higher levels of infrastructure and resources have better outcomes after cancer surgery, independent of country income. Without urgent strengthening of hospital infrastructure and resources, the reductions in cancer-associated mortality associated with improved access will not be realised. Funding: National Institute for Health and Care Research