THE EFFECT OF MARIGOLD (TAGETES ERECTA LINN.) ON THE RESPONSE OF CILEMBU SWEET POTATO (IPOMOEA BATATAS POIR. VAR RANCING) INVESTED WITH PEST (CYLAS FORMICARIUS FABR.)

• Main Author: Rahmanisa, Gia
• Format: Final Project
• Language: Indonesia
• Subjects: Ilmu hayati ; Biologi
• Online Access: https://digilib.itb.ac.id/gdl/view/63180
• Institution: Institut Teknologi Bandung

Cilembu sweet potato is a sweet potato with a distinctive sweet taste and is widely liked. However, in cultivation, farmers often experience crop failure due to the attack of the boleng pest which is thought to be an endemic species in sweet potato gardens. Previous research conducted in Cigendel Village, Sumedang Regency, West Java showed that marigold plants planted around cilembu sweet potato plants could suppress the growth of boleng pests and increase tuber growth and harvest. Therefore, further research was carried out to determine the effect of marigolds given by sowing at the beginning of the planting period accompanied by planting marigolds around the land that has been invested with boleng pests. This study was designed completely randomized with 8 treatment plots consisting of TA (marigolds and chopped), CTA (Cylas, marigolds and chopped), CA (Cylas and chopped), A (chopped), T (only marigolds), CT (Cylas and marigolds), C+ (given Cylas) as positive control, and C- (without Cylas, marigolds, and chopped) as negative control. Parameters observed included proline and salicylic acid levels in leaves and roots which were tested quantitatively using a spectrophotometer and sugar content tests in tubers were carried out quantitatively with HPLC (High Pressure Liquid Chromatography) SHIMADZU LC 10AD, with column shodex sugar SP 0810, eluent H2O, flow rate 1 mL/min, pressure 12 and column temperature 75°C. The results of this study showed that the correlation between the addition of marigolds to the levels of proline and salicylic acid in the leaves and roots of the Cilembu sweet potato plant and the addition of marigolds in the form of stands had an effect on the high levels of sugar (sucrose, glucose, and fructose).