抄録
The present study concerning variations in salivary amylase and protease activities of Lygus disponsi LINNAVUORI has shown that the enzyme activities varied with the season, the individual and the developmental stages. The amylase activity had a tendency to diminish at low temperatures (2°C) and after prolonged periods of starvation (24 hr). The variation in the enzyme activities between a pair of the salivary glands in a bug was small for amylase but large for protease. The correlation between amylase and protease activities was insignificant. Some causes of individual seasonal variations in enzyme activity, and differences between production systems for amylase and protease are discussed.
