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Hiệu quả của điều trị canxi trong việc chặn bệnh thán thư trái cây do Colletotrichum gloeosporioides gây ra
Tóm tắt
Banana, chili and orange are the most widely grown plants in Viet Nam. However, their fruits are severely affected by anthracnose disease caused by Colletotrichum gloeosporioides. Therefore, the objective of this study was to evaluate the effect of CaCl2 on in vitro mycelial growth and in vivo lesion diameters on pisang awak banana, orange and chilli fruits. Solution of CaCl2 at three concentrations of 20, 40 or 60 mM was mixed into medium of PDA at temperature approximately 55-60ºC, gently shaken and poured into petri dish with a volume approximately 10 mL per one petri. A hyphal round slice of Colletotrichum was put at the center of each petri dish. Diameter of colony was recorded at 2, 4 and 6 days after putting the fungal slice. Then, fully matured fruits were inoculated with a spore suspension of C. gloeosporioides at a density of 106 spore mL-1, treated with CaCl2 20mM by soaking the fruits for 30 s. The results showed that the solution of CaCl2 at concentrations of 20, 40 and 60 mM highly inhibited hyphal development of Colletotrichum at in vitro conditions. Moreover, the calcium solution at 20 mM could protect the fruits from anthracnose damage.
Từ khóa: anthracnose, CaCl2, chili, orange, pisang awak banana
Tiếng Việt