Fish feed, in general, contains protein content not less than 35%. At present, the use of the fish meal as a source of protein is facing problem since the price of fish meal has been increasing and often unavailable. Thus, there is a need to replace fish meal with another source of protein. Since the brewers' yeast contains 38-42% protein it might be possible to produce fish feed.

Six thousand commercial broiler chickens in a commercial farm in Nakornprathom province were divided into three groups of 2000 birds. The birds of all three groups were given B1 strain of ND Vaccine via eye drops when they were 10 days old. In addition, the first, second and third groups of birds were inoculated with 0.3 ml/bird of 1.0% levamisole, oil adjuvant ND vaccine and normal salines respectively using subcutaneous injection. Sera collected from these birds when they were 23, 32 and 42 days old, were assay for HI titres and found that the HI titres from the oil adjuvant vaccine group were higher than those of levamisole and normal saline treated groups, whereas the levamisole treated group gave higher HI titres than those of saline treated group.

The main objective of this study is to identify the socio-economic factors influencing farmers decision making regarding the adoption of high yielding varieties of rice and the impact on farming and farmers of Suphan Buri. Two hundreds farm households were randomized from Don Chedi of Suphan Buri for interview. The adoption of high yielding varieties of rice is largely determined by the degree of water control. The adoption has been accompanied by a sharp rise in demand for labor and farm mechanization. This resulted in raising farm productivity and reducing seasonal unemployment.

Incidence of hydropsy-chick affected flocks from 12 commercial broiler farms in Chon-Buri Chachoeng-Sae and Samutprakarn was recorded. The age of chicks affected with hydropsy syndrome ranged from two to six weeks. The mortality rate was low (5-25%) and reached the peak when chicks were about four weeks of age. In all studied flocks, there had been previously an attack of pulmonary aspergillosis during the first week of life. The hydropsy chicks, at necropsy, showed ascites, hydropericardium, cardias dilatation -hydropericardium, cardiac dilatation with prominent nodular thickening of A-V valves and severe lung edema. Microscopic sections of the lungs revealed diffuse foci of Aspergillus-granulomata.

Fifteen nodular lesions of the lungs caused by Fasciola sp. from slaughtered buffaloes (swamp type) were macroscopically and microscopically studied. All lesions were irregularly distributed in diaphragmatic lobes. Mixture of dark brown pigments and visible flukebodies oozing out on cut surfaces was a prominent characteristic. The flukes, with no evidence of sexual organs, were relatively much smaller than those in the biliary system of the liver. Microscopically, those lesions were similar to active paratitic granuloma. The adjacent areas showed subacute to chronic bronchopneumonia with intra-alveolar organization in some alveoli. The properties of fluke pigments, with application of some histochemical stains, are like those of hemosiderin pigments.

The authors reported an outbreak of infection occurring in a small poultry laying farm without obvious symptoms of sick birds. The mortality rate within a few week-period of onset was up to 50%. Post mortem examinations were conducted and the lesions were described. With the aid of bacteriological confirmation including biochemical and pathogenicity test, the cause of the disease was found to be Pasteurella multocida. None of the birds died after one-week treatment and management.

The adverse effects of Monensin sodium and Troleandomycin in commercial broiler chickens in a commercial farm, confirmed by experimentation, were exhibited as sudden onset, leg weakness, prostration, unable to stand up and death. Morbidity rate was 30%, mortality rate was over 10%. Postmortem examination of these birds showed no significant lesions.

The primary objective of this study is to determine the extent of agricultural cooperatives' contribution to fertilizer diffusion at the farm level. A systematic interview of villagers together with the observation of village behavior and attitude in rural Chiangmai form the hard core data on which the findings of this empirical study rest. Chi-square tests of independent variables have been employed to determine the relationship of agricultural cooperative membership and fertilizer adoption. None of the results is statistically significant. This implies that agricultural cooperative fails to influence fertilizer adoption in the research area. This is consistent and thus reinforced by the field observation. The failure of the agricultural cooperative in introducing fertilizer to farmers is due not only to the inefficiency of the cooperative but also the unfavorable price ratio between fertilizer and agricultural product as well as the unreliable quality of fertilizer. The field data collection was financed by an ADC research grant. The report writing has been made possible by ISEAS of Singapore.

Three groups of 20 chickens Were given Lasota strain of Newcastle disease vaccine when they were 11 days old via eye dropping. Chickens of the first group were also inoculated subcutaneously with levamisole 4.5 mg/bird and 6.75 mg/bird (10.0 mg/lb. and 15.0 mg/lb.). Serum samples were serially collected and hemagglutination inhibition (HI) titres were assay. HI titres in sera from levamisole inoculated birds were higher than those in sera collected from control birds.