Tag: Esther Ngumbi

• Opinion by Esther Ngumbi (urbana, illinois, usa)
• Friday, August 18, 2023
• Inter Press Service

These reoccurring climate-linked extreme events serve as warning signals that no state, country, or region is immune to climate change. Leaders and citizens in all areas must act with urgency to mitigate this existential threat to humanity.

These record-breaking and historical extremes in weather, impacting farmers and our ability to grow essential agricultural crops such as maize, wheat, soybeans, wheat, and vegetables including tomatoes, mark a pivotal moment for all of us, including scientists, and policy makers at both the state and federal levels. Much more needs to happen to strengthen agricultural systems of today so that crops can withstand these adversities.

As leaders around the world consider climate mitigation initiatives, they need to be sure to strengthen agricultural crops’ resilience to extreme heat, drought, insect herbivory and flooding, that have become increasingly common.

Like humans, crops are sensitive to drought and extreme heat and the interactions of drought and heat. When temperatures are high, normal crop growth and development is affected. Further, several important crop physiological processes such as respiration, photosynthesis and transpiration are affected by heat stress.

Similarly, agricultural crops including maize and vegetable crops such as tomato are also sensitive to excessive rainfall and flooding stress when it happens individually or in combination with other stressors. Evidence to date reveals that, in fact, excessive rainfall results in maize yield losses of comparable magnitude to drought.

Ultimately, because of extremes brought about by climate change, plants’ normal growth is affected with consequences for yields, food supply and security as well as agriculture. This is problematic for many reasons, including because agriculture is an important sector of economies of the US, the UK, France and many African countries.

Of concern are the cascading consequences and other legacy effects that may linger on, long after extreme events such as drought have happened. These legacy effects affect both soils, microbial communities living in the soils and the health of crop plants that are grown in years to come.

Clearly, there is an urgent need to have actionable strategies to help strengthen plants and agricultural resilience to drought, heat waves, elevated temperatures, flooding, extreme precipitation, and insect outbreaks.

Strengthening the resilience of agricultural and crop plants demands the incorporation of multiple actionable strategies.

Among the actionable strategies is to encourage farmers to adopt climate-smart practices. Climate smart practices include many approaches ranging from planting heat and drought tolerant crop varieties to planting varieties that have been bred to enhance their photosynthetic capacities and water use efficiencies when periods of stress occur, to applying products such as silicon and silicone nanoparticles to applying inoculants that are made from naturally occurring beneficial soil microbes that can confer tolerance to heat and drought among other stressors.

In addition, growers can adopt soil health conservation practices including planting cover crops, mulching, and practicing no till or reduced tillage. All these practices ultimately improve soil health. It’s a win-win,

In parallel, there is need to fund research to understand how agricultural crops respond to drought, flooding, insect herbivory outbreaks and other climate-linked stresses. There is need to fund research that breeds crops that can grow under the new climate extremes including crops that can grow and produce when two stressors happen in combination.

All these actionable strategies require some form of capital; hence it is important for growers to be assisted with the capital and other inputs they need to adopt climate-smart strategies and other soil health conservation practices. Governments, NGO’s, private funders must work together and create partnerships that seek to ensure that growers and researchers have funds needed to adopt these practices.

In dealing with climate change extremes that threaten the growth, development, and the health of agricultural crops that are important to meet our food security needs, we must choose to facilitate the adoption of practices that strengthen crops resilience to these stressors. Every investment in research and funding the adoption of these strategies by growers helps.

Esther Ngumbi, PhD is Assistant Professor, Department of Entomology, African American Studies Department, University of Illinois at Urbana-Champaign

© Inter Press Service (2023) — All Rights ReservedOriginal source: Inter Press Service

• Opinion by Esther Ngumbi (urbana, illinois, usa)
• Friday, January 27, 2023
• Inter Press Service

But the honeybee is just one of the many described insect species whose declining numbers has entomologists like me, environmentalists, and everyday citizens who love insects including Monarch butterflies worried. Across the U.S. and around the world there is a growing body of evidence and trend of insect decline. It’s so bad, that many are calling it the insect apocalypse.

Currently, there are over 1 million described species. But in study after study, review after review the story has remained the same: we are losing insects at unprecedented rates. The rapid decline of insects is caused by multiple factors including climate change and agriculture, increases in the usage of insecticides and  herbicides, deforestation, urbanization, and light pollution.

Everyone should be worried about this trend. Insects, including bees, ants, butterflies, dragonflies, beetles, and grasshoppers, make up over 80% of terrestrial species on Earth. Insects are a keystone species that provide invaluable ecosystem services  – from pollination, to biological control to serving as bio-indicators of healthy soils and streams.

Annually, in the United States, the economic value of the vital ecosystem services performed by insects is estimated to be $57 billion.  In addition, over 75% of agricultural crop species and 85% wild flowering plants are pollinated by insects Furthermore, insects like dung beetles perform important functions like breaking down manure which is a service important to the U.S. cattle industry.

A world without insects would be disastrous. Insects are food to other species including birds and their demise would have catastrophic effects on food webs.

Human food and nutrition security also benefits from insects. Essential micronutrients in the human diet (antioxidants, vitamins A and C, lycopene, folic acid, and tocopherol) are derived from insect-pollinated crops, primarily citrus and other fruits and vegetables including tomatoes.

In total, pollinator mediated crops account for about 40% of global nutrient supply for humans. Conversely, the loss of insects can worsen hidden hunger (micronutrient deficiencies), which afflicts over 2 billion individuals globally. It can further threaten global food security and public, human, and environmental health.  Ultimately losing insects contributes to decreasing biodiversity with a devastating impact on life on Earth.

Clearly, we need insects. The U.S. government, policy makers, scientists like me and everyday citizens should act with urgency to prevent further declines in their numbers

Protecting insects from national and global declines will require a combination of approaches including several actions that individuals can take.

First, since habitat destruction is among the largest drivers of insect declines, it is important that countries — beginning with the U.S. — create diverse landscapes. This includes forestland, meadows, and prairies to provide a variety of food and nesting resources for insects.

Everyday citizens can contribute to the attainment of this goal by planting native plants and maintaining pollinator gardens. In addition, individuals who keep lawns can consider converting them to diverse natural habitats.

Second, we must reduce insecticide and herbicides usage. Managing pests and weeds can be done by using integrated pest management approaches or integrated vegetation management approaches. These approaches promote the use of safer alternatives and encompass multiple non-chemical methods such as the use of resistant cultivars, trap cropping, and crop rotation.

Third, we can reduce light pollution. Evidence available suggests that light pollution is a driver of insect declines as it interferes with insect foraging, development, movement and their reproductive success. Simple actions like turning outdoor lights off at night can make a huge difference.

Fourth, do your part to help reduce carbon emissions. Climate change is among the biggest drivers of insect decline. Simple actions by everyday citizens like biking to work and using renewable energy sources can make a difference.

Fifth, you can choose to become an ambassador and advocate for insects and insect conservation. Begin by learning about the local, regional, national, and global policies that are in place to protect insects to prevent further insect decline.

Furthermore, encourage elected officials and all forms of governments – from local to state to federal — to pass laws and policies to protect insects while implementing measures such as setting aside protected land spaces including parks to serve as refuge spaces for insects.

Complementing the above actions is the need to support research and educational institutions, professional societies, and  nonprofit organizations that are actively addressing insect decline issues through research and taking actions to protect our natural world and conserve ecosystems that are home to insect species. These include the Entomological Society of America , The International Center for Insect Physiology and Ecology, and  The Xerces Society.

Finally, research and research funding are needed both now and in the future. This can help facilitate discovery of more insect species, monitor and document insect biodiversity across a diversity of landscapes and ecosystems and help us understand all facets of insect biology in natural and managed settings.

We need insects. Our ecosystems need insects. We must commit to doing something to protect them. Their existence is essential for a sustainable future.

Esther Ngumbi, PhD is Assistant Professor, Department of Entomology, African American Studies Department, University of Illinois at Urbana-Champaign

© Inter Press Service (2023) — All Rights ReservedOriginal source: Inter Press Service