Early Starvation Contributes to the Adaptive Capacity of Corythucha marmorata (Uhler), an Emerging Pest in China

Food shortages severely reduce the prospects of insect survival in natural settings, including in the case of herbivorous insects. However, the early starvation experience of some insects has positive effects throughout their entire lifespan. It is important to discuss the effects of refeeding and host plants on the capacity of herbivorous insects to adapt to starvation and low temperatures, considering that starvation resistance is expected to show some degree of adaptive phenotypic plasticity. We tested the relationship between host plant, starvation, and the supercooling capacity of the invasive pest Corythucha marmorata. In particular, we highlighted how early starvation affects the refeeding and recovery phases. Among the various range of hosts, the chrysanthemum lace bug has the fastest growth rate on Helianthus annuus, and the strongest supercooling capacity on Symphyotrichum novi-belgii. Especially, starvation for 2 days increases the rates of survival, development, and number of eggs upon refeeding, in comparison to no starvation. A 3-day starvation period in the nymphal stage significantly increased the supercooling capacity of 5th instar nymphs and adults, as observed in our study.

A Novel Computational Framework for Precision Diagnosis and Subtype Discovery of Plant With Lesion

Plants are often attacked by various pathogens during their growth, which may cause environmental pollution, food shortages, or economic losses in a certain area. Integration of high throughput phenomics data and computer vision (CV) provides a great opportunity to realize plant disease diagnosis in the early stage and uncover the subtype or stage patterns in the disease progression. In this study, we proposed a novel computational framework for plant disease identification and subtype discovery through a deep-embedding image-clustering strategy, Weighted Distance Metric and the t-stochastic neighbor embedding algorithm (WDM-tSNE). To verify the effectiveness, we applied our method on four public datasets of images. The results demonstrated that the newly developed tool is capable of identifying the plant disease and further uncover the underlying subtypes associated with pathogenic resistance. In summary, the current framework provides great clustering performance for the root or leave images of diseased plants with pronounced disease spots or symptoms.

The Response of Antioxidant System of Drought-Stressed Green Pea (Pisum sativum L.) Affected by Watering and Foliar Spray with Silica Nanoparticles

Abiotic stress caused by drought impairs plant growth and reduces yields. This study aimed to investigate the impact of silica nanoparticles (SiO2 NPs) through the adverse effects of drought on the growth, oxidative stress, and antioxidative response of pea ‘Respect’. Pea plants were grown in a greenhouse before being watered (100 ± 1 mL per pot) or foliar sprayed (ca. 14 ± 0.5 mL plant−1) with suspensions containing SiO2 NPs (0, 12.5 ppm, 25 ppm, and 50 ppm) and were exposed to drought stress for 10 days. Drought stress was created by maintaining 30% of the soil moisture while the control was 80%. The growth parameters of pea grown under drought stress conditions were improved by spraying or watering plants with SiO2 NPs (12.5, 25, and 50 ppm). At drought stress, peas treated with SiO2 NPs (50 ppm) increased their relative water content by 29%, specific leaf area by 17%, and decreased root/shoot ratio by 4% as compared to plant non-treated with SiO2 NPs. In addition, spraying or watering of SiO2 NPs increased peas tolerance to drought by increasing the activity of antioxidant enzymes at least three times including catalase, ascorbate peroxidase, glutathione reductase, and superoxide dismutase, as well as reducing hydrogen peroxide and lipid peroxidation in plant tissue. It was observed the increase in total phenolic compounds and non-enzymatic antioxidant activity (DPPH, ABTS, FRAP) in peas treated with SiO2 NPs under drought stress. The physiological response of peas to drought and the effects of SiO2 NPs studied in this experiment based on the use of the concentration of 50 ppm nanoparticles can protect peas from the damaging effects of drought and could help reduce global food shortages.

Association between personality traits and food stockpiling for disaster

This study investigated the association between personality traits and food stockpiling for disasters in predicted high-risk areas of food shortages due to the Nankai Trough Earthquake. This survey was conducted between December 18 and 20, 2019, using a web-based questionnaire. The participants were 1,200 individuals registered with an online survey company. This study analyzed the association between the Big Five personality traits and food stockpiling status (n = 1192). The Big Five personality traits assess five basic dimensions of personality (i.e., extraversion, conscientiousness, agreeableness, neuroticism, and openness). To measure theses personality traits, we used the Japanese version of the Ten-Item Personality Inventory (TIPI-J). The Mann-Whitney test and a multivariable logistic regression analysis revealed that none of the Big Five personality traits were significantly associated with having or not having stockpile food. However, interestingly, considering the stages of behavior change regarding stockpiling, high extraversion was significantly positively related to initiating stockpiling. Moreover, high neuroticism was significantly positively related to interrupted stockpiling. Therefore, it is crucial to focus on personality traits (especially low extraversion and high neuroticism) to promote food stockpiling for disasters.

Everyday life of Ukrainians during the years of mass artificial famine of 1921–1923. According to narrative sources

This article examines the daily life of Ukrainians during the years of mass artificial famine. The aim of our article is to analyze the perception of Ukrainians of the new everyday life: the Bolshevik occupation of Ukraine, their food policy, which caused a mass artificial famine and took the lives of 3.5 million Ukrainians. The author analyzes narratives (memories, diaries of contemporaries of events and interviews collected directly by the author and colleagues during ethnographic expeditions). According to the author, the narratives, despite a certain subjectivity, most fully reflect the essence of the era, convey the feelings and experiences of people who found themselves in the grip of a mass artificial famine caused by the policies of the communist regime. As a result of the study, the author concludes that the effects of mass artificial famine were long-lasting. We mean not only the economic, but, first of all, the humanitarian component. The psychology of the people has changed: many Ukrainians have been forced to humiliate themselves to get miserable food, some have been forced to lose their moral face and dare to steal, and anger and hatred for people have intensified. According to medical research, hunger causes anger, greed, cruelty, misanthropy, immorality. Hunger is able to activate atavistic human instincts. Children were the most affected by the mass artificial famine. They were suffered from food shortages, starved, some of them died forever. Those who survived had poor health and a broken psyche. After the mass artificial famine of 1921 – 1923, Ukrainian society transformed its identity. However, the final loss of national origins will occur during the Holodomor genocide of 1932 – 1933.

FOOD-RELATED COPING STRATEGIES ADOPTED BY SOME HOUSEHOLDS DURING COVID-19 LOCKDOWN IN NIGERIA

As part of the measures to contain the spread of the COVID-19 virus in Nigeria during the early stages of the pandemic, a lockdown of movements within and from outside the country was declared by the federal government. This article presents findings on food-related coping strategies adopted during the COVID-19 lockdown in Nigeria. A cross sectional survey using an online based questionnaire received responses from 883 households regarding information on food consumption, health seeking behaviour and food coping strategies during the COVID-19 lockdown. Food Coping Strategy Index (FCSI) was computed from the data received based on standard methods. Analysis and presentation of data was done using descriptive and inferential statistics. The key findings show that daily mealtimes generally reduced from an average of 3 to 2 times. The storage capacity of households showed an average of 2-week food stock of staples, and most of the respondents had started reducing either their usual portion sizes or frequency of meals in order to cope with food shortages. As regards health seeking behavior, older respondents were more likely to take prophylactic medication (p<0.004) and there was a higher preference for fruits and Vitamin C as prophylactic items. A negative correlation between FCSI with mealtime during COVID-19 lockdown (p<0.000) and monthly income (p<0.000) was observed. The findings presented provide information for policy intervention in the areas of social safety nets and palliatives disbursement in the event of similar lockdown restrictions in the future.

Food crisis in fast-growing Turkmenistan

Since the beginning of the 21st century, Turkmenistan’s economy has been growing very fast, which has been primarily generated through the extractive sector and construction industry. After the energy price collapse in mid-2014, the country has recorded a shortage of foreign currency. The authoritarian regime passed currency and economic problems onto the society. As a result, the country has experienced the most severe food crisis in its history. The main aim of the paper is to identify the reasons behind the food crisis in Turkmenistan. The paper tries to answer the following question: how did it happen that people in one of the fastest-growing countries in the 21st century have been suffering from food shortages? The study is based on data retrieved from the World Bank Open Data, ILOSTAT, and Observatory of Economic Complexity, as well as a critical review of independent news websites. The food crisis in Turkmenistan was primarily caused by hyperinflation and rationing basic groceries at preferential prices, wage arrears, cutting salaries of state employees to fund construction projects in progress, group layoffs of state employees, growing difficulties in running a private business, and depriving people of the possibility to exchange the currency at the official rate. The end of a free provision of Turkmenistan’s population with electricity, gas, and drinking water has further deepened the crisis.

The effect of the food insecurities in farming and non-farming households: lesson learnt from households in the Francis Baard district municipality, Northern Cape Province of South Africa

The purpose of this study was to determine the effect of food insecurity in farming and non-farming households in the Francis Baard District Municipality. The research approach used in this study was quantitative. By using a cross-sectional survey, data was collected referring to the population of interest. A simple random sample comprising of 516 respondents from farming and non-farming households in the Frances Baard Municipality was selected. The data were analysed using multiple logistic regression (MLR) models. The results revealed that food shortages are more likely (B = 0.22, p = 0.01) to cause severe food insecurities in farming households when access to food gardens and smallholding is constant. On the other hand, non-farming households could also be affected by severe food insecurity due to food shortages (B = 0.29, p = 0.04) and lack of access to smallholding farming areas. The results further showed that food gardening is highly likely to reduce severe food insecurity. The results imply that the municipality has to provide access to food gardening facilities and smallholder plots for non-farming and farming households to combat severe food insecurity and promote food security. The policy on comprehensive producer support only recognises the support for the farmers' different categories than the households. Therefore, it is recommended that the policymakers amend this policy to enable the household to be empowered as beneficiaries.