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stage of the life cycle. Trichogramma are most effective if released as the adult pest begins to lay eggs. For Leucinodes, this occurs, on average, 1 day after emergence of the adults or 10 days after cocoon spinning (Navasero 1983), i.e., when larval population is lowest. Field release can be timed from the last peak (add 16 days) or the last low (add 27 days). Euborellia consume the larvae of Leucinodes and must be released during the 11-day larval period. This period is marked by an abrupt increase in crop damage as eggs hatch and larvae begin boring into shoots and fruit. Euborellia released at the beginning of this stage are most effective in controlling the pest species. Fieldwork is continuing to evaluate the level of control attained with one and two releases of Euborellia per Leucinodes life cycle. Knowledge of the population fluctuations of Leuci nodes may also prove useful for control methods not considered in this study. For example, the nematode Neoplectana carpocapsae may be used against pupal Leucinodes (Janardar and Bardhan 1974). On the other hand, if chemical methods prove necessary, their effectiveness can be increased by spraying during the most susceptible stage of the pest's life cycle. Over a period of 17 weeks, none of the biological, cultural, or chemical control methods tested produced higher yields than the untreated plots in the experimental field (Table 2). However, Leucinodes caused less damage in four treated plots than in the control plots. Damage was lowest in plots sprayed with insecticide, followed by those cleared manually, Trichogramma treated, and Euborellia treated. These results may be due to the late start of biological control treatments and damage caused by insects other than Leuci nodes, especially thrips and mites. The insecticides used against shoot borers do not control thrips and mites; populations of both these pests increased noticeably in sprayed plots during the dry season. They caused leaf yellowing, reduced yield, and defoliation. In unsprayed plots, these symptoms appeared later and were less severe, probably because the pests were held in check by predators and parasites present Table 2. Comparison of Leucinodes damage and yield of eggplant for various treatments. Treatment Damagea Yield (kg)b Control 347 111.0 Manual sanitation 263 106.6 Trichogramma 266 105.3 Euborellia 341 98.7 Trapping 395 97.7 Insecticide 169 93.2 a Cumulative number of Leucinodes-dama god fruit and shoots in 90 plants, monitored after every harvest. b Cumulative yield of three 20-m2 plots. 321
Table 3. Cost (PHP) of pest management treatments. Applications! Average cost per application per ha Monthly Treatment month Material Labour Total cost/ha Cost for this stud? Insecticide 4.2 951 96 1 047 4397 118.72 Manual clearing 10 0 98 98 980 26.46 Trapping Continuous 100 160 260 260 7.02 Trichogramina I - 12b 12 0.32 Euborellia 1 800c 800 21.60 Control - 0 0 0 0 0 Note: 23 Philippine pesos (PHI') = 1 US dollar (USD). a Based on 60 m2 per treatment over 4.5 months. b From biocontrol lab, UPLB, based on 150 000 individuals released. From Javier (1989), based on 18 000 individuals released. C
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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,
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Conclusions The subject of this vol
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Jusoh Mamat, M.; Anas, A.N.; Heong,
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Health-risk assessment of pesticide
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especially in the absence of comple
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depends largely on external factors
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Specific situations may require spe
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that the best possible work is done
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doses (chronic poisoning) or delaye
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Table 1. Poisoning incidents in fou
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Pesticide research for public healt
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Current pest control practices in T
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800- 400- 200 - 1980 1981 1982 1983
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designed 30-40 years ago (Jusoh Mam
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and tore easily. One investigation
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education, mass-communication tools
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Increase and improve training activ
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Castaneda, C.P. 1988. Pesticide poi
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Ooi, A.C.P.; Heong, K.L.; Lim, B.K.
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Investigations into acute pyrethroi
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Level of exposure To assess the lev
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Table 2. Cases of acute pyrethroid
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(in 121 subjects), usually develope
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Deltamethrin was detectable in the
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pyrethroid poisoning. Therefore, th
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Gilliatt, R.W.; Willison, R.G. 1963
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Table 1. Value of imported pesticid
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Study two Twelve farmers participat
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All activities Left hand (73.2) Lef
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Acknowledgment- The three studies r
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Since the creation of Pakistan in 1
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Table 1. Incidents of pesticide poi
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Sandu, S.S.; Waters, M.D.; Simmon,
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and chlordane. Pest resistance to t
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young workers was 15.8%, 6.8%, and
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Storage of pesticides Although the
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Discussion The lowland regions and
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Pulmonary obstructive disease in a
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To investigate the presence and mea
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Age (years) Table 1. Distribution o
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was among paraquat users who smoked
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Levin, P.J.; Klaff, L.J.; Rose, A.G
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the delta. The total population of
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The successive and simultaneous rel
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on clinical studies and laboratory
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This made the collection of blood s
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Table 1. Relation between informati
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analysis, and engaging in various t
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Table 1. Value (million KSH) of pes
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To develop a health-education packa
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Storage site Table 3. Storage of ag
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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
Page 281 and 282: to the targeted larvae of mosquitoe
Page 283 and 284: The role of the community Many prob
Page 285 and 286: from locally available sacking mate
Page 287 and 288: services. The project also includes
Page 289 and 290: Maxwell, C.A.; Curtis, C.F.; Haji,
Page 291 and 292: Botanical pesticides: optimizing pe
Page 293 and 294: neurotoxin but a cytotoxin, cross-r
Page 295 and 296: MoDuscicide- and pesticide-developm
Page 297 and 298: A development plan has been identif
Page 299 and 300: and environmental effects must be d
Page 301 and 302: Devitt, B.D.; Philogène, B.J.R.; H
Page 303 and 304: Endod, a potential natural pesticid
Page 305 and 306: University in Ottawa, and in other
Page 307 and 308: in the field (Lugt 1981), 137 500 m
Page 309 and 310: Hutchinson, J.; Dalziel, J.M. 1929.
Page 311 and 312: Community participation, including
Page 313 and 314: Acknowledgment- This research has b
Page 315 and 316: multiplication. The high temperatur
Page 317 and 318: Because pesticides are required in
Page 319 and 320: Africa and now East Africa. The suc
Page 321 and 322: Integrated pest management 1PM may
Page 323 and 324: to risk crop damage. Close involvem
Page 325 and 326: Ramos-Ocampo, V.E.; Magallona, E.D.
Page 327 and 328: esidues on fresh and cooked vegetab
Page 329 and 330: Grassy strip 108 N Farmer's Experim
Page 331: Table 1. Description and efficiency
Page 335 and 336: in the field. These pests were the
Page 337 and 338: PART V APPENDICES
Page 339 and 340: Ravindra Fernando, National Poisons
Page 341 and 342: Frank White, Pan-American Health Or
Page 343 and 344: ECHO abdominal ultrasonograph EEG e
Page 345 and 346: URT upper respiratory tract USAID U
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