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the first, the potential dermal exposure of rice farmers applying methyl parathion (50% emulsifiable concentrate, EC) was measured at various stages under field conditions. The applicability of the World Health Organization's protocol (WHO 1982) in conducting the study was assessed, and the necessity for protective clothing for rice farmers was investigated. The second exposure study assessed the protection afforded by locally designed protective clothing during the application of methyl parathion (50% EC) under field conditions. The third study assessed the exposure and resulting health risk arising from the application of monocrotophos (28.5% water-soluble concentrate, WC) to rice under field conditions. An attempt was made to study the benefits of "Gardman" protective clothing and high-density polyethylene (HDPE) bottles with dispensers. Methods The methods used in the three studies were based on the WHO protocol for field surveys of exposure to pesticides (WHO 1982). The three exposure studies were conducted in rice fields in the Philippine regions of Bulacan, Pampanga, and Laguna in the rice-growing area of the central plain of Luzon. Study one Forty-five farmers participated in the first methyl parathion study. They were divided into eight groups (about six farmers per group), one for each pesticide application activity: Mixing and loading; Spraying at the crop's vegetative stage (first of three replicates, RI); Spraying at the crop's maximum tillering stage (R2); Spraying at the crop's booting stage (R3); Cleaning and disposal; Day I field reentry; Day 7 field reentry; and All activities. The last group represented the normal activities undertaken by rice farmers. All groups were exposed for a minimum of I h. The farmers wore cotton overalls, hoods, and gloves with inner patches. The patches were analyzed for pesticide residue using gasliquid chromatography. Samples of early-morning urine and urine collected 6 h after exposure were analyzed for the urinary metabolite, p-nitrophenol, using spectrophotometric methods (Kaye 1980). 64
Study two Twelve farmers participated in the second methyl parathion study, comprising two groups of six subjects each. All farmers wore cotton 1-shirts, pants, and gloves. The first group wore the locally designed protective clothing in the form of plastic vests over their 1-shirts, plastic bags to cover hands, and plastic wrappings around their legs. Each group was exposed for at least I h. Sampling gauze pads, backed with aluminum foil and another cotton patch, were placed in the inner clothing of all farmers. The purpose of the cotton patch was to secure the aluminum foil and gauze pads inside the clothing. Patch locations were based on the WHO protocol with the following modifications: Head - on the back part of the head or hood; Arm - upper surface of right and left forearms, as they are held with elbow bent at a right angle across body, midway between elbow and wrist; Forearm - back surface; Thigh - front of mid-thigh; Leg - front of mid-leg; Back - right and left shoulder blades; and Chest - right and left chest. Patches were analyzed for pesticide residues using gasliquid chromatography. Cholinesterase levels in red blood cells were determined before and after exposure using the Michel method (modified by Aldridge and Davies 1952). Urine samples were collected and analyzed as described for Study one above. To determine the recovery of methyl parathion from the sampling media, field and laboratory recovery tests were conducted for both studies. Study three Twenty-eight farmers participated in the third study focusing on monocrotophos. They were divided into four groups of seven subjects. Group A wore normal work clothes, consisting of long pants and long-sleeved cotton shirts. Group B wore "Gardman" protective clothing over their normal working clothes. Group C wore normal work clothes, but were supplied monocrotophos concentrate in 1-L HDPE bottles with built-in dispensers. Group D was the control group. All groups were exposed for 3 days for about 4-5 h/day. 65
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Impact of pesticide use on health i
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IMPACT OF PESTICIDE USE ON HEALTH I
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©International Development Researc
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Contents Acknowledgments viii Forew
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Control of disease vectors: a curre
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Foreword From their first appearanc
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PART! EPIDEMIOLOGY OF PESTICIDE POI
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Although pesticides are used both i
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Table 1. Introduction of pesticides
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problem. The International Developm
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impact of pesticides on Canadian wi
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investigated further. For example,
Page 25 and 26: Conclusions The subject of this vol
Page 27 and 28: Jusoh Mamat, M.; Anas, A.N.; Heong,
Page 29 and 30: Health-risk assessment of pesticide
Page 31 and 32: especially in the absence of comple
Page 33 and 34: depends largely on external factors
Page 35 and 36: Specific situations may require spe
Page 37 and 38: that the best possible work is done
Page 39 and 40: doses (chronic poisoning) or delaye
Page 41 and 42: Table 1. Poisoning incidents in fou
Page 43 and 44: Pesticide research for public healt
Page 45 and 46: Current pest control practices in T
Page 47 and 48: 800- 400- 200 - 1980 1981 1982 1983
Page 49 and 50: designed 30-40 years ago (Jusoh Mam
Page 51 and 52: and tore easily. One investigation
Page 53 and 54: education, mass-communication tools
Page 55 and 56: Increase and improve training activ
Page 57 and 58: Castaneda, C.P. 1988. Pesticide poi
Page 59 and 60: Ooi, A.C.P.; Heong, K.L.; Lim, B.K.
Page 61 and 62: Investigations into acute pyrethroi
Page 63 and 64: Level of exposure To assess the lev
Page 65 and 66: Table 2. Cases of acute pyrethroid
Page 67 and 68: (in 121 subjects), usually develope
Page 69 and 70: Deltamethrin was detectable in the
Page 71 and 72: pyrethroid poisoning. Therefore, th
Page 73 and 74: Gilliatt, R.W.; Willison, R.G. 1963
Page 75: Table 1. Value of imported pesticid
Page 79 and 80: All activities Left hand (73.2) Lef
Page 81 and 82: Acknowledgment- The three studies r
Page 83 and 84: Since the creation of Pakistan in 1
Page 85 and 86: Table 1. Incidents of pesticide poi
Page 87 and 88: Sandu, S.S.; Waters, M.D.; Simmon,
Page 89 and 90: and chlordane. Pest resistance to t
Page 91 and 92: young workers was 15.8%, 6.8%, and
Page 93 and 94: Storage of pesticides Although the
Page 95 and 96: Discussion The lowland regions and
Page 97 and 98: Pulmonary obstructive disease in a
Page 99 and 100: To investigate the presence and mea
Page 101 and 102: Age (years) Table 1. Distribution o
Page 103 and 104: was among paraquat users who smoked
Page 105 and 106: Levin, P.J.; Klaff, L.J.; Rose, A.G
Page 107 and 108: the delta. The total population of
Page 109 and 110: The successive and simultaneous rel
Page 111 and 112: on clinical studies and laboratory
Page 113 and 114: This made the collection of blood s
Page 115 and 116: Table 1. Relation between informati
Page 117 and 118: analysis, and engaging in various t
Page 119 and 120: Table 1. Value (million KSH) of pes
Page 121 and 122: To develop a health-education packa
Page 123 and 124: Storage site Table 3. Storage of ag
Page 125 and 126: Table 5. Causes of agrochemical and
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Methods A pilot field survey was un
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Conclusion The practices followed b
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manufactured or formulated locally,
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However, based on individual compla
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Table 4. Acetylcholinesterase activ
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Age did not appear to be an importa
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eactions to the pesticides in occup
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Bowers, M,B.; Goodman, E.; Sim, V.M
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Extent of exposure of farm workers
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Group III consisted of 31 farmers w
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25 - 0 Level of exposure J Group 1,
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Pesticides were stored everywhere c
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Table 2. Concluded. Question Answer
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PART II RELATING PESTICIDE DEVELOPM
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Toxicity Table 1. Requirements and
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Screening Process development Route
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Progress in improving safety Pestic
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type of formulation, and warning pr
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The pyrethroid, cypermethrin, is mo
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Studying the effects of pesticides
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of the risk is a quantitative issue
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egistry could be linked to the lice
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poisoned through mishandling of an
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no documented incident could be fou
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Region Table 3. Use of using pictog
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of fluorinated HDPE because fluorin
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Current initiatives, at the interna
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inding within their jurisdictions.
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Benefits of a hazard auditor From t
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different agencies take to be permi
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industry and of its serving to legi
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Anonymous. 1988a. FAO code of condu
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(Adam 1976; Fraser and Burrill 1979
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in the lower price categories tend
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Anas, N.; Jusoh Mamat, Md.; Heong,
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Zam, A.K. 1980. Bancian pengurusan
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Materials and methods Assessment of
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At the end of each day's operations
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Table 3. Number of garments chafing
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underlines the need to change attit
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Evaluation and management of pestic
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target and react with some crucial
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scientists on a contractual basis,
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pesticides in developing countries
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Regional information resources for
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Table 2. Number of enquiries receiv
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extent of this problem in developin
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Promoting the safe use of pesticide
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pests) is observed. Thus, the "quic
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is one of principal agencies respon
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Pretesting materials in training an
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of costly medical technologies and
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The agricultural sector has by far
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At the community level, the extent
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Neufeld, V. 1989. Community-based m
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Outline for learning module using o
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WHO (World Health Organization). 19
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In the past decade, tremendous effo
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Jiang-Su province Results and discu
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As a result of deregulation, the nu
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Table 3. Proportion of workers usin
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Shih, J.H.; Wu, Z.Q.; Zhang, Y.X.;
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Pesticides and wildlife: a short gu
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Using target-specific products mini
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specifications. Other data are asse
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Formulation-specific concerns The e
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mirex, and chiordecone have been ba
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1984). The base for pesticide granu
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e more stringently reviewed. In Can
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For example, searching for carcasse
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overlooked. In developing countries
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Establish monitoring programs to de
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Grue, C.E.; Fleming, W.J.; Busby, D
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Schafer, E.W., Jr; Brunton, R.B. 19
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Table 1. Prevalence and distributio
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By 1980, resistance to at least one
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tries. Japanese encephalitis has be
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to the targeted larvae of mosquitoe
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The role of the community Many prob
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from locally available sacking mate
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services. The project also includes
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Maxwell, C.A.; Curtis, C.F.; Haji,
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Botanical pesticides: optimizing pe
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neurotoxin but a cytotoxin, cross-r
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MoDuscicide- and pesticide-developm
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A development plan has been identif
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and environmental effects must be d
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Devitt, B.D.; Philogène, B.J.R.; H
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Endod, a potential natural pesticid
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University in Ottawa, and in other
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in the field (Lugt 1981), 137 500 m
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Hutchinson, J.; Dalziel, J.M. 1929.
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Community participation, including
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Acknowledgment- This research has b
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multiplication. The high temperatur
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Because pesticides are required in
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Africa and now East Africa. The suc
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Integrated pest management 1PM may
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to risk crop damage. Close involvem
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Ramos-Ocampo, V.E.; Magallona, E.D.
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esidues on fresh and cooked vegetab
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Grassy strip 108 N Farmer's Experim
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Table 1. Description and efficiency
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Table 3. Cost (PHP) of pest managem
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in the field. These pests were the
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PART V APPENDICES
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Ravindra Fernando, National Poisons
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Frank White, Pan-American Health Or
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ECHO abdominal ultrasonograph EEG e
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URT upper respiratory tract USAID U
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