{"id":198729,"date":"2019-02-09T14:20:19","date_gmt":"2019-02-09T08:50:19","guid":{"rendered":"https:\/\/www.colombotelegraph.com\/?p=198729"},"modified":"2019-02-11T23:55:49","modified_gmt":"2019-02-11T18:25:49","slug":"using-agrochemicals-safely-avoiding-environmentally-harmful-organic-farming","status":"publish","type":"post","link":"https:\/\/www.colombotelegraph.com\/index.php\/using-agrochemicals-safely-avoiding-environmentally-harmful-organic-farming\/","title":{"rendered":"Using Agrochemicals\u00a0Safely &#038; Avoiding Environmentally Harmful Organic Farming"},"content":{"rendered":"<p><strong>By <a href=\"https:\/\/www.colombotelegraph.com\/?s=Chandre+Dharmawardana\">Chandre Dharmawardana<\/a> &#8211;<\/strong><\/p>\n<div id=\"attachment_171829\" style=\"width: 160px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2016\/12\/Chandre-Dharmawardana.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-171829\" class=\"size-full wp-image-171829\" src=\"https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2016\/12\/Chandre-Dharmawardana.jpg\" alt=\"\" width=\"150\" height=\"150\" srcset=\"https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2016\/12\/Chandre-Dharmawardana.jpg 150w, https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2016\/12\/Chandre-Dharmawardana-50x50.jpg 50w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a><p id=\"caption-attachment-171829\" class=\"wp-caption-text\">Dr. Chandre Dharmawardana<\/p><\/div>\n<p>It is gratifying that several writers have taken up<span class=\"Apple-converted-space\">\u00a0 <\/span>the vital topic of pesticide use in agriculture (6<sup>th<\/sup><span class=\"Apple-converted-space\">\u00a0 <\/span>of February, Island).<span class=\"Apple-converted-space\">\u00a0<\/span>Dr. Ranil Sananayake (RS)<span class=\"Apple-converted-space\">\u00a0 <\/span>has claimed to<span class=\"Apple-converted-space\">\u00a0 <\/span>\u201crebut\u201d<span class=\"Apple-converted-space\">\u00a0 <\/span>what I wrote. I stated<span class=\"Apple-converted-space\">\u00a0 <\/span>that our soils are NOT laden with toxic agrochemicals, and that they support a thriving ecosystem full of<span class=\"Apple-converted-space\">\u00a0<\/span>bugs and worms. They attract<span class=\"Apple-converted-space\">\u00a0 <\/span>egrets<span class=\"Apple-converted-space\">\u00a0 <\/span>and other birds when the soil is tilled. I claimed that<span class=\"Apple-converted-space\">\u00a0 <\/span>the<span class=\"Apple-converted-space\">\u00a0 <\/span>crops from our soils are safe to eat. RS seems to hold that our soils are full of toxic agrochemical residues<span class=\"Apple-converted-space\">\u00a0 <\/span>that have harmed biodiversity.<span class=\"Apple-converted-space\">\u00a0<\/span>Dr. Anura Widanapathirana (AW) has called for &#8216;proper controls on pesticide use&#8217; and I<span class=\"Apple-converted-space\">\u00a0<\/span>agree with most of his views.<\/p>\n<p>RS<span class=\"Apple-converted-space\">\u00a0 <\/span>says \u201cThere are only Egrets left (and sometime a few Ibis), these are the most resistant to toxins in the chemically changed paddy fields we have today&#8230;.The earthworms and bugs &#8230; are again only those species with a high degree of tolerance, the rest have disappeared\u201d. He<span class=\"Apple-converted-space\">\u00a0 <\/span>proceeds to a personal categorization of me as<span class=\"Apple-converted-space\">\u00a0 <\/span>carrying on \u201csome narrow minded personal vendetta against, other Sri Lankans (misguided or not) to bolster &#8230; the economically utilitarian view of the world &#8230;. In this, he shares the stage with &#8230; politicians and bureaucrats who believe that development is only measured by the GDP. Public health &#8230; is of little consequence\u201d. Surely, Dr. RS<span class=\"Apple-converted-space\">\u00a0 <\/span>is unaware that our politicians believe only<span class=\"Apple-converted-space\">\u00a0 <\/span>in aggrandizing their own pockets and not the GDP! <span class=\"Apple-converted-space\">\u00a0<\/span>He accuses me<span class=\"Apple-converted-space\">\u00a0<\/span>\u201cof<span class=\"Apple-converted-space\">\u00a0 <\/span>colossal ignorance &#8230; in ornithological history and confusion with the soil ecosystems of highly fertilized (HF) and traditionally farmed (TF) fields\u201d.<\/p>\n<div id=\"attachment_198731\" style=\"width: 910px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2019\/02\/Agriculture-Pic-by-Dr.-Chamila-Perera.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-198731\" class=\"wp-image-198731 size-full\" src=\"https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2019\/02\/Agriculture-Pic-by-Dr.-Chamila-Perera.jpg\" alt=\"\" width=\"900\" height=\"600\" srcset=\"https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2019\/02\/Agriculture-Pic-by-Dr.-Chamila-Perera.jpg 900w, https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2019\/02\/Agriculture-Pic-by-Dr.-Chamila-Perera-300x200.jpg 300w, https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2019\/02\/Agriculture-Pic-by-Dr.-Chamila-Perera-768x512.jpg 768w, https:\/\/www.colombotelegraph.com\/wp-content\/uploads\/2019\/02\/Agriculture-Pic-by-Dr.-Chamila-Perera-128x86.jpg 128w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><p id=\"caption-attachment-198731\" class=\"wp-caption-text\">Photo credit Dr. Chamila Perera<\/p><\/div>\n<p>I had nowhere claimed that development is only measured by the GDP, or ever given one-parameter explanations of complex entities like<span class=\"Apple-converted-space\">\u00a0 <\/span>an economy or a ecosystem.\u00a0I was NOT comparing HF systems and TF fields.<span class=\"Apple-converted-space\">\u00a0<\/span>The main concern<span class=\"Apple-converted-space\">\u00a0 <\/span>was whether the HF soil is full of harmful agrochemical toxins or not, and my answer has been that<span class=\"Apple-converted-space\">\u00a0 <\/span>field studies<span class=\"Apple-converted-space\">\u00a0<\/span>have shown that the toxin levels even after several decades of agrochemical use and indeed MIS-USE, are well below the maximum tolerable levels (MTL) set by the WHO and the FAO.<\/p>\n<p>In answering Mr. Siri Pathirana who identifies himself as a simple farmer, it seemed better to use the flocking of birds to paddy fields rather than<span class=\"Apple-converted-space\">\u00a0<\/span>give technical data or references to the scientific literature. It was Dr. Sarath Amarasiri, an ex-Director General of Agriculture who initially used this very apt indicator of a healthy soil in popular discussions, and I concur with him.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Dr. RS, after accusing me of \u201ccolossal ignorance of ornithological history\u201d, proceeds to show his colossal knowledge of the subject by essentially claiming that the<span class=\"Apple-converted-space\">\u00a0 <\/span>loss of biodiversity is caused by<span class=\"Apple-converted-space\">\u00a0 <\/span>a single cause<span class=\"Apple-converted-space\">\u00a0 <\/span>\u2013<span class=\"Apple-converted-space\">\u00a0 <\/span>the<span class=\"Apple-converted-space\">\u00a0 <\/span>use of \u201ctoxic\u201d agrochemicals<span class=\"Apple-converted-space\">\u00a0 <\/span>in<span class=\"Apple-converted-space\">\u00a0 <\/span>highly fertilized agriculture.\u00a0Of course, only the colossally knowledgeable would dare to present such single-cause explanations of complex issues like ornithological or<span class=\"Apple-converted-space\">\u00a0<\/span>other<span class=\"Apple-converted-space\">\u00a0<\/span>types of biodiversity.<span class=\"Apple-converted-space\">\u00a0<\/span>However, just as the simplified <span class=\"Apple-converted-space\">\u00a0 <\/span>five-lesson political analysis of the early JVP was very attractive to<span class=\"Apple-converted-space\">\u00a0<\/span>many members of the public,<span class=\"Apple-converted-space\">\u00a0 <\/span>the simplistic theory that agrochemicals are THE cause of loss of biodiversity and most health problems &#8211; be it kidney disease or<span class=\"Apple-converted-space\">\u00a0 <\/span>alzheimer &#8211;<span class=\"Apple-converted-space\">\u00a0<\/span>finds<span class=\"Apple-converted-space\">\u00a0<\/span>easy credence with the<span class=\"Apple-converted-space\">\u00a0 <\/span>populace. Hence the rise of<span class=\"Apple-converted-space\">\u00a0 <\/span>the likes of Ven. Ratana, Vandana Shiva in India, and<span class=\"Apple-converted-space\">\u00a0<\/span>similar<span class=\"Apple-converted-space\">\u00a0<\/span>\u201cGreen champions\u201d in many countries, claiming that we must return to<span class=\"Apple-converted-space\">\u00a0<\/span>\u201cnatural\u201d agriculture;<span class=\"Apple-converted-space\">\u00a0 <\/span>some even reject vaccinations, immunizations, fluoridation of water,<span class=\"Apple-converted-space\">\u00a0 <\/span>and other public health initiatives.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>How can Dr. RS say that earthworms and egrets are the most hardy against agro-toxins? He should<span class=\"Apple-converted-space\">\u00a0<\/span>give<span class=\"Apple-converted-space\">\u00a0<\/span>a quantitative criterion (e.g., the LP50 values\/weight) before he rushes to print. Only the Pope can make unsubstantiated ex-cathedra statements, being allegedly infallible when he speaks on matters of the faith.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>The earthworm is a most sensitive creature widely used by scientists as a barometer of soil health. At a more microscopic level, the total micro-organism biomass, as well as, say,\u00a0the distribution of the mass spectrum of the micro-organisms can be used as measures of the health of the soil. If we consider a widely used agrochemical like glyphosate,<span class=\"Apple-converted-space\">\u00a0<\/span>numerous<span class=\"Apple-converted-space\">\u00a0<\/span>studies show how earthworms become healthier when the naturally or industrially occurring soil cadmium and other trace heavy metals are made insoluble by the glyphosate residues that reach the soil during spraying.<span class=\"Apple-converted-space\">\u00a0 <\/span>For a recent study, see:<span class=\"Apple-converted-space\">\u00a0 <\/span>Zhou et al, Environmental Toxicology and Chemistry, vol. 33, p 2351-2357 (2014). Similarly, regarding the effect of glyphosate formulations on soil microbes<span class=\"Apple-converted-space\">\u00a0 <\/span>and microbial community structure, see: Lane et al, Pedobiologia, vol. 55, pages 325-342 (2012).<\/p>\n<p>Dr. Widanapathirana also makes anecdotal claims<span class=\"Apple-converted-space\">\u00a0 <\/span>of<span class=\"Apple-converted-space\">\u00a0 <\/span>loss of biodiversity, e.g.,<span class=\"Apple-converted-space\">\u00a0 <\/span>that there are fewer leeches, both on land and in water. However, is this predominantly caused by agrochemicals? Dr. W does not say that<span class=\"Apple-converted-space\">\u00a0 <\/span>harmful levels of pesticides<span class=\"Apple-converted-space\">\u00a0 <\/span>are found in the Sri Lankan environments. It is true that hosphate levels in water rise above tolerable thresholds seasonally and produce algae blooms.<span class=\"Apple-converted-space\">\u00a0<\/span>But there is ample evidence that the ambient pesticide-residue levels remain well below the tolerable maxima. The WHO-NSF study on Chronic Kidney disease examined the pesticide levels and metal toxins in the North Central Province (Jayatilleke et al 2014) and found amounts well below WHO specifications. There are many other studies that support the same conclusion. For instance, the study reported by Aravinna et al. [Journal of Environmental Science and Health, Part B, vol. 52, p. 37\u201347. (2016) ]<span class=\"Apple-converted-space\">\u00a0<\/span>confirms the lack of significant amounts of pesticide residues in Sr Lanka&#8217;s environment. The WHO thresholds are set, mindful of<span class=\"Apple-converted-space\">\u00a0 <\/span>bio-magnification of pesticide residues on plant uptake.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Dr Widanapathirana says that \u201cIn contrast, the paddy fields in Myanmar, Laos and Cambodia are full of fish and other edible creatures\u201d and suggest that these countries use less agrochemicals. World bank data for agrochemical use <i>taken as they are<\/i><span class=\"Apple-converted-space\">\u00a0<\/span>confirm what Dr. W says. However,<span class=\"Apple-converted-space\">\u00a0<\/span>their<span class=\"Apple-converted-space\">\u00a0<\/span>fertilizer inputs to paddy fields are similar to those of Sri Lanka when the very high usage in<span class=\"Apple-converted-space\">\u00a0<\/span>tea estates is factored out. But there is no doubt that, optimally, much less fertilizer would be used<span class=\"Apple-converted-space\">\u00a0 <\/span>if the free market in agrochemicals is abolished.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>So, while the residual pesticide load is low,<span class=\"Apple-converted-space\">\u00a0<\/span>Sri Lanka&#8217;s environment, both rural and urban,<span class=\"Apple-converted-space\">\u00a0<\/span>is full of partially oxidized<span class=\"Apple-converted-space\">\u00a0<\/span>petroleum, kerosene and<span class=\"Apple-converted-space\">\u00a0<\/span>diesel residues, with vast amounts of highly toxic particulate matter. I n addition, garbage containing plastics are regularly burnt in urban and rural locations. The ambient amounts of<span class=\"Apple-converted-space\">\u00a0 <\/span>toxins in the air greatly exceed<span class=\"Apple-converted-space\">\u00a0 <\/span>WHO specifications by factors pf thousands. Toxins from fossil-fuel exhaust have a marked effect on biodiversity, especially as they occur at levels above<span class=\"Apple-converted-space\">\u00a0<\/span>thresholds. But those who wish to ban agrochemicals and wax eloquent<span class=\"Apple-converted-space\">\u00a0 <\/span>about traditional farming remain mum about adopting traditional transport. \u201cGreen\u201d politicians like Ven. Ratana, and the not-so Green ones import and sell their duty-free cars on the black market!<span class=\"Apple-converted-space\">\u00a0 <\/span>Furthermore, politicians are pushing for the installation of coal-fired power stations which are notorious for their polluting effects as well as their capacity to fill their bank accounts with commissions. <span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Loss of bird biodiversity will be reflected at every level of an ecology, be it butterflies, bees, earthworms, earwigs or amoebas. It is common to find e-mail messages from the so-called \u201cAVAAZ team\u201d soliciting<span class=\"Apple-converted-space\">\u00a0 <\/span>donations to fight<span class=\"Apple-converted-space\">\u00a0<\/span>agribusiness claiming<span class=\"Apple-converted-space\">\u00a0 <\/span>that bees all over the world are<span class=\"Apple-converted-space\">\u00a0 <\/span>decimated<span class=\"Apple-converted-space\">\u00a0 <\/span>by agrochemicals. This is similar to<span class=\"Apple-converted-space\">\u00a0<\/span>Dr. Senanayake<span class=\"Apple-converted-space\">\u00a0 <\/span>directly equating the loss of bird biodiversity<span class=\"Apple-converted-space\">\u00a0 <\/span>to toxic agrochemicals. Interestingly, contrary to the claim of the AVAAZ team, the populations of bees have increased by 40%<span class=\"Apple-converted-space\">\u00a0 <\/span>according to<span class=\"Apple-converted-space\">\u00a0 <\/span>Prof. David Goulson of Oxford University and collaborators ( Science<span class=\"Apple-converted-space\">\u00a0 <\/span>27<sup>th<\/sup><span class=\"Apple-converted-space\">\u00a0 <\/span>Mar 2015: Vol. 347, page 1255957 ). What has been decreasing rather dramatically<span class=\"Apple-converted-space\">\u00a0 <\/span>are the<span class=\"Apple-converted-space\">\u00a0 <\/span>WILD BEES. If some whiffs of the spray<span class=\"Apple-converted-space\">\u00a0 <\/span>of neonicotinoids are claimed to spread even to the wild bees and affect them, then<span class=\"Apple-converted-space\">\u00a0<\/span>why aren&#8217;t<span class=\"Apple-converted-space\">\u00a0 <\/span>the honey bees similarly affected?<\/p>\n<p>While pesticides and other secondary causes like the emergence of new types of parasites play a secondary role, the MAIN REASON<span class=\"Apple-converted-space\">\u00a0 <\/span>for the decline of wild bees, butterflies, leeches etc., and indeed the decline of<span class=\"Apple-converted-space\">\u00a0 <\/span>biodiversity in general is the LOSS OF WILDERNESS<span class=\"Apple-converted-space\">\u00a0 <\/span>HABITAT. Human encroachment, be it for housing, roads or organic farming, destroys habitat. The destruction of habitat for<span class=\"Apple-converted-space\">\u00a0<\/span>human use since independence in Sri Lanka has been truly extensive, given a population increase of a factor of<span class=\"Apple-converted-space\">\u00a0 <\/span>four.<span class=\"Apple-converted-space\">\u00a0<\/span>Biodiversity has been the victim. <a href=\"https:\/\/www.colombotelegraph.com\/index.php\/moving-from-conventional-farming-to-organic-farming-jumping-from-the-frying-pan-into-the-fire\/\"><strong>However, adopting organic farming makes matters worse<\/strong><\/a>.<\/p>\n<p>Organic farming needs two to four times<span class=\"Apple-converted-space\">\u00a0<\/span>land and water to obtain the same yields as with hybrid seeds using methods of modern intense agriculture etc.,<span class=\"Apple-converted-space\">\u00a0<\/span>that<span class=\"Apple-converted-space\">\u00a0<\/span>require no tilling (i.e., no erosion and <span class=\"Apple-converted-space\">\u00a0 <\/span>less agrochemical runoff). In contrast, organic agriculture causes grater habitat loss and erosion.<span class=\"Apple-converted-space\">\u00a0<\/span>The <a href=\"http:\/\/dh-web.org\/place.names\/posts\/CD-Mueller-OrganicL.pdf\"><strong>research report<\/strong><\/a> by<span class=\"Apple-converted-space\">\u00a0<\/span>high-priests of organic farming headed by Dr. Adrian Mueller of the Swiss institute of Organic agriculture<span class=\"Apple-converted-space\">\u00a0<\/span>implicitly verify<span class=\"Apple-converted-space\">\u00a0<\/span>these negatives of organic farming.<\/p>\n<p>Dr. Widanapathirana<span class=\"Apple-converted-space\">\u00a0<\/span>emphasizes the need for effective controls<span class=\"Apple-converted-space\">\u00a0 <\/span>and farmer education. I fully concur with him. In fact, it is not just farmers, but also the general public who must be made aware of the safe use of agrochemicals. During my tenure as a Professor of Chemistry and a Vice-Chancellor of a Sri Lankan University in the mid-1970s, I took pains to introduce<span class=\"Apple-converted-space\">\u00a0<\/span>mandatory course units in environmental science to our science graduates. We also introduced, for the first time, specialized courses in food science and technology to deliver healthy food to the public.<span class=\"Apple-converted-space\">\u00a0 <\/span>Unfortunately this does not seem to be true of current course content in Sri Lankan B.Sc courses. <span class=\"Apple-converted-space\">\u00a0 \u00a0<\/span><\/p>\n<p>Agrochemicals should be controlled (not banned) within a precautionary principle, almost as with pharmaceuticals. Every substance becomes a toxin \u2013 be it vitamins or even salt and pepper<span class=\"Apple-converted-space\">\u00a0 <\/span>\u2013<span class=\"Apple-converted-space\">\u00a0 <\/span>if the recommended dose is exceeded. The same is true for soil toxicity. It is the technical officers of the Department of Agriculture (DOA) who should issue permits for releasing<span class=\"Apple-converted-space\">\u00a0 <\/span>optimal amounts of fertilizer and pesticide needed by each customer, depending on the local conditions and the cultivation cycle.<span class=\"Apple-converted-space\">\u00a0<\/span>The DOA officials can advise the farmers on crop rotation techniques etc., that can be used to reduce the needed pesticide and fertilizer inputs.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>In fact, a rudimentary control system existed prior to 1977, but<span class=\"Apple-converted-space\">\u00a0 <\/span>it was axed on the alter of the free market when \u201cMudalalis \u2013 i.e., henchmen of the local politicians \u2013 began<span class=\"Apple-converted-space\">\u00a0 <\/span>to sell agrochemicals for as much profit as possible, together with other general merchandise.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Dr Ranil Senanayake quotes Hon. DS Senanayake, a great agriculturist and Prime Minister who pushed forward modern farming, modern irrigation, and unhesitatingly used DDT to combat malaria.<span class=\"Apple-converted-space\">\u00a0<\/span>Hon. DS Senanayake had said that \u2018Development of our nation should be measured by the larder of the poorest of its homes\u2019. Indeed, if RS expects the poorest of the land to stock their larders with organic rice at<span class=\"Apple-converted-space\">\u00a0 <\/span>5-10 times the price of normal rice, and with bottles of \u201cspring\u201d water<span class=\"Apple-converted-space\">\u00a0 <\/span>(in a plastic bottle to boot !), then<span class=\"Apple-converted-space\">\u00a0 <\/span>he does not realize that some 40% of our school children come to school hungry.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p> [&hellip;]<\/p>\n","protected":false},"author":155,"featured_media":171829,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,46,8],"tags":[],"class_list":["post-198729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-colombotelegraph","category-constitutional-reforms","category-editorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Using Agrochemicals\u00a0Safely &amp; 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