臺灣農藥科學第四期電子書

藥毒所果樹診斷案例剖析 51 Analysis of Fruit Cases by the TACTRI Diagnosis Center Chao-Feng Tai 1 , Chi-Yi Li 1 , Chiou-Chu Su 1 Abstract Tai, C. F., Li, C. Y., and Su, C. C. 2018. Analysis of Fruit Cases by the TACTRI Diagnosis Center. Taiwan Pestic. Sci. 4: 37-51. Taiwan Agricultural Chemicals and Toxic Substances Research Institute (TACTRI) began to offer the pest diagnosis of plant in 1974 and developed the information system in 2001. The current study analyzed 4,235 cases involving fruit (from 28 families and 46 crops) from 2001 to 2016. These cases primarily originated in the central regions of Taiwan, especially Taichung and Nantou, and 1,144 of them involved citrus. Of these cases, 45.1% were found to not be caused by disease or pests, and the most common type of disease or pest to affect crops was citrus thrips (90 identified cases). We used cases of citrus thrips, pitaya stem canker, and strawberry anthracnose to analyze the relationship between climate variables and the period of orchard cultivation. Citrus thrips were mainly found between April and October, the period in which pruning, fruit thinning, and young fruit growth occur. Pitaya stem cankers were mainly found between June and September, the period in which flower and fruit pruning occur. Strawberry anthracnose was mainly found between July and November, the period in which seedling propagation and heel-in occur. It is challenging to make the relation between diagnosis cases and climate because of differences pertaining to regional terrain, micro-climate, and type of sample source. In the future, the TACTRI diagnosis center will continue to track cases of compromised fruit crops and categorize them as “not caused by disease nor pest”, “problem related to fertilizer management”, “lack of trace elements”, “problem with pesticide application”, and so on. In addition to the provision of diagnostic results, we aim to provide fruit farmers with Accepted: August 6, 2018. * Corresponding author, E-mail: cenhz@tactri.gov.tw 1 Taiwan Agricultural Chemicals and Toxic Substances Research Institute, Council of Agriculture, Taichung