| Author | Panapanaan, Virgilio M. |
| Call Number | AIT Thesis no.AE-91-41 |
| Subject(s) | Planthoppers--Thailand, Central
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Science |
| Publisher | Asian Institute of Technology |
| Abstract | The Brown planthopper outbreak in Sri Prachan District was studied to evaluate its
impact to the farmers' rice production system. With the varying degrees of infestation in
the study area, an estimated damaged area out of 7,471 rai total rice cultivated area during
the crop year 1990 was about 3,815 rai which is 51.66%. Analysis of the outbreak revealed
that the popular cultivation of RD 23 in wet season and Suphan 60 in the dry season favored
the BPH massive increase. The increased use and misuse of pesticide particularly
monocrotophos and pyrethroid aggravated the situation. However, as to fertilizer usage of
the farmers, though kinds and rates varied across locations, it was not a clear indication that
it directly influence the BPH infestation, but its greening effects explicitly suggests that it
could enhance or trigger the insect pest BPH.
Farmers ultimate response to BPH problem is indiscriminate spraying of chemicals.
Variations as to farmers pesticide preferences, rates and timing of application explains for
itself why the severity also varied from highly affected area down to the least affected area.
The attitude of the farmers towards government provision and control measures is favorable
but insufficiency of control measures is the common feedback by most farmers. The
governments' response towards BPH problem is so dramatic at the national level, that is,
featured by immediate provision of necessary control measures and policy approvals. Village
magnification of government assistance reflected that there seemed to be a slow pace in
extension process as reflected by low percentage of farmers who received the assistance
during the BPH infestation. The insufficiency of control measures given and distribution
disparities across villages also speaks for extensions' relative inefficiency. |
| Year | 1991 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Suthad Setboonsarng;Weber, Karl E.; |
| Examination Committee(s) | Waibel, Hermann;Demaine, Harvey; |
| Scholarship Donor(s) | Deutscher Akademischer Austauschdienst;Federal Republic of Germany; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1991 |