Pathogenicity and aggressiveness of Fusarium oxysporum Schl. in bottle gourd and bitter gourd

Abstract

Cumagun C.J.R., Aguirre J.A., Relevante C.A., Balatero C.H. (2010): Pathogenicity and aggressiveness of Fusarium oxysporum Schl. in bottle gourd and bitter gourd. Plant Protect. Sci., 46: 51-58.Fusarium oxysporum is responsible for a large range of diseases on economically important crops such as bitter gourd and bottle gourd. Pathogenicity and aggressiveness of F. oxysporum in bitter gourd and bottle gourd isolated from two breeding stations of East-West Company in the Philippines namely San Ildefonso, Bulacan and Lipa, Batangas were tested. Eleven F. oxysporum isolates from bitter gourd and 12 isolates from bottle gourd were inoculated on 7-day and 1-month-old bitter gourd and bottle gourd plants in the greenhouse. All F. oxysporum isolates from bitter gourd were pathogenic on 7-day-old and 1-month-old bitter gourd and nine out of 12 isolates from bottle gourd were pathogenic on bottle gourd. Three isolates from the infested soil were non-pathogenic on bottle gourd. There was a significant difference in aggressiveness of the isolates on their natural hosts (P ≤ 0.05). There also was a significant difference in the aggressiveness of isolates pathogenic on bitter gourd from Batangas and Bulacan (P ≤ 0.05) but isolates from Batangas and Bulacan had similar aggressiveness as bottle gourd (P ≥ 0.05). Aggressiveness of F. oxysporum on 7-day-old bitter gourd and bottle gourd was significantly different compared to those on 1-month-old plants, demonstrating an effect of the host age onaggressiveness. Correlations between aggressiveness of F. oxysporum isolates on 7-day-old and 1-month-old bitter gourd and bottle gourd were moderate (r = 0.63, 0.78). Out of 12 isolates from bottle gourd, only one isolate was pathogenic on 7-day-old bitter gourd. Four of the isolates from bitter gourd were pathogenic on 7-day-old bottle gourd but not on 1-month-old bottle gourd. No cross infection was observed on mature plants.

Development of Pathogenicity and AFLP to Characterize Fusarium oxysporum f.sp. momordicae Isolates from Bitter Gourd in China

“…This finding deviated from the previous reports that the FOM isolates could infect the seedling and adult plants of white flower L. siceraria (Zhu and Qi ; Cumagun et al. ). The pathogenicity variation in L. siceraria might be attributed to different variants of L. siceraria .…”

The Population Genetic Variation Analysis of Bitter Gourd Wilt Caused byFusarium oxysporumf. sp.momordicaein China by Inter Simple Sequence Repeats (ISSR) Molecular Marker

“…Zhu and Qi showed that cross infectivity of FOM from bitter gourd was pathogenic to bottle gourd seedlings and club bottle gourd seedlings and adult plants [7]. Cumagun et al found that some FOM isolates from bitter gourd could infect 7-days-old bottle gourd seedlings, while they could not infect the 1-month-old adult plants [4]. Chen et al also reported that some FOM isolates from bitter gourd slightly infected bottle gourd ( Lagenaria siceraria var.…”

“…Bitter gourd ( Momordica charantia L.) wilt caused by Fusarium oxysporum f. sp. momordicae Sun & Huang (FOM), is one of the most disastrous diseases in China [1], Japan [2], India [3] and Philippine [4]. Sun and Huang firstly reported that the occurrence of bitter gourd wilt disease in Taiwan, China[5], which has become prevalent since 1996 [6].…”

Penyebab Penyakit Layu pada Tanaman Semangka di Karawang, Jawa Barat

“…F. solani dapat menyebabkan gejala layu pada Cucurbitaceae yang sering dikacaukan dengan gejala layu yang disebabkan oleh F. oxysporum. Perbedaan keduanya ialah F. solani tidak bersifat sistemik seperti halnya F. oxysporum yang lebih dikenal sebagai penyebab penyakit jaringan pembuluh (Snyder dan Hansen 1941;Cumagun et al 2010). F. solani f.sp.…”