Control Efficacy of Agricultural Jiaosu against Camellia oleifera Anthracnose

doi:10.16409/j.cnki.2095-039x.2025.02.067

Abstract

Abstract: To evaluate the control effect of agricultural Jiaosu (AJ) against Camellia oleifera anthracnose, five types of AJ were prepared using garlic, chili, camellia seed meal, orange peel and pineapple peel, respectively. Inhibitory effects of AJ on Colletotrichum siamense were evaluated through growth inhibition assays to identify the most effective one and its optimal concentration. Field trials were conducted to determine their control efficacy against C. oleifera anthracnose, and the organic acid content in AJ was measured to explore the antimicrobial mechanism. The results showed that the inhibitory effects of all five types of AJ gradually increased with higher application rates and longer exposure time. Among them, AJ using camellia seed meal exhibited the strongest antifungal activity. At a concentration of 15%, it achieved an inhibition rate of 100% against C. siamense, outperforming the prochloraz 1000-time dilution treatment. Field trials indicated that treatments with AJ using camellia seed meal, pineapple peel, and mixed ferment extracts all delayed the onset of the disease compared to the control group. Camellia seed meal ferment extract showed the most significant control effect, with an efficacy of 71.3% at 15% concentration, though still lower than that of the prochloraz treatment. The ferment extracts were rich in organic acids such as acetic acid, lactic acid and malic acid, with acetic acid content being the highest in tea seed meal ferment extract at 176.29 mg/mL. In conclusion, this study provides an economical and effective alternative for controlling C. oleifera anthracnose.

Key words: Camellia oleifera anthracnose, Colletotrichum siamense, agricultural Jiaosu, biocontrol

CLC Number:

S476

XIAO Tian, GAO Yuxin, GUO Kaifa, JIN Chenzhong, HAO Yalun. Control Efficacy of Agricultural Jiaosu against Camellia oleifera Anthracnose[J]. Chinese Journal of Biological Control, 2025, 41(6): 1430-1438.

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