Q2. What are the future works in this paper?
The possibility of economic ‘ locking in ’ occurring as a result of the adoption of unsustainable economic techniques was shown graphically.
Q3. What are the factors that affect the health of families?
Inadequate or non-existent storage facilities, poor living conditions, contaminated water supplies also affect the health of families.
Q4. What is the effect of pesticides on rice?
Planthoppers are naturally controlled by wolf spiders and a variety of other natural predators and parasites which are destroyed by many of the pesticides commonly used on rice (Conway and McCauley, 1983, p. 288; Conway and Barbier, 1990, p. 22).
Q5. What is the effect of reverting to the old technique?
As Tisdell (1999, 49- 50) points out that reverting to the old technique might cause a downward jump in the welfare function (described as consumers’ surplus plus producers’ surplus), say from F to G due to mining of the natural environment by the new technique.
Q6. What are the factors that increase the incidence of illnesses from exposure to pesticides in developing countries?
Poor health and diet are other factors that are known to increase the incidence of illnesses from exposure to pesticides in developing countries (WRI, 1999).
Q7. What are the main effects of pesticides on agriculture?
Apart from pests developing resistance to pesticides there are many harmful effects of pesticides that affect agricultural sustainability, the environment and the health of farmers as well as those living around near farms.
Q8. What is the number of people who die from pesticide poisoning in Sri Lanka?
World Health Organization (1990) estimates that between 50 million and 100 million people in the developing world may receive intensive pesticide exposure, and another 500 million receive lower exposures.
Q9. What are the main reasons why farmers continue to use pesticides?
In addition to the increase in quantity of pesticides used, farmers use stronger concentrations of pesticides, they have increased the frequency of pesticide applications and increasingly mix several pesticides together to combat pesticide resistance by pests (Chandrasekera et al. 1995; WRI, 1999).
Q10. What are the main effects of pesticides on the health of farmers?
The use of pesticides have not only influenced level of agricultural production and their sustainability but have also affected the health of users (mainly farmers), those living near farms and consumers of food products.
Q11. What are the main types of pesticides that are known to cause death in Bangladesh?
In addition to fish, shrimps, prawns, crayfish and crabs are also known to suffer from pesticides, but detailed studies of pesticide poisoning are not available.
Q12. What is the effect of pesticides on agricultural productivity?
The manner in which pesticides reduce pest infestations and how chemical control creates a disequilibrum in the agricultural system was shown graphically.
Q13. What is the effect of endosulfan on the beef production in Australia?
In Australia, Endosulfan (a very toxic organochlorine insecticide) used on cotton crops has contaminated beef production and has affected exports in recent times (Williams, 1999, p. 11).
Q14. What is the effect of pesticides on the population of pests?
over time targeted pests have developed resistance to pesticides necessitating increasing applications or resulting in rising populations of pests or both.
Q15. What is the main reason why farmers may be forced to use pesticides?
Loans obtained by farmers for the purchase of inputs (e.g. pesticides and fertilizers) may also be a barrier to switching to other strategies.