Association of an isolate of papaya leaf curl virus and papaya leaf curl betasatellite with leaf curl disease of radish in India

Abstract Tomato yellow leaf curl virus (TYLCV), a begomovirus (genus Begomovirus) is the causal agent of tomato yellow leaf curl disease (TYLCD), which causes severe damage to tomato (Solanum lycopersicum) crops throughout tropical and subtropical regions of the world. TYLCV is transmitted by the whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in a circulative and persistent manner. Our previous studies showed that tomato flavonoids deter B. tabaci oviposition, but the effects of tomato flavonoids on the settling and feeding behavior of B. tabaci and on its transmission of TYLCV are unknown. Using two near-isogenic tomato lines that differ greatly in flavonoid levels, we found that high flavonoid production in tomato deterred the landing and settling of B. tabaci. Moreover, electrical penetration graph studies indicated that high flavonoid levels in tomato reduced B. tabaci probing and phloem-feeding efficiency. As a consequence, high flavonoid levels in tomato reduced the primary and secondary spread of TYLCV. The results indicate that tomato flavonoids provide antixenosis resistance against B. tabaci and that the breeding of such resistance in new varieties could enhance TYLCD management.

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Associations of papaya leaf curl virus and betasatellite with yellow vein disease of pot marigold (Calendula officinalis L.)

Archives of Phytopathology and Plant Protection ◽

10.1080/03235408.2019.1704350 ◽

2019 ◽

Vol 52 (19-20) ◽

pp. 1289-1297

Author(s):

V. Venkataravanappa ◽

Priti Sonavane ◽

C. N. Lakshminarayana Reddy ◽

M. Krishna Reddy

Keyword(s):

Yellow Vein ◽

Calendula Officinalis ◽

Pot Marigold ◽

Calendula Officinalis L ◽

Leaf Curl Virus ◽

Vein Disease ◽

Papaya Leaf Curl Virus ◽

Leaf Curl

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SUSCEPTIBILITY OF CHILLI LINES / VARIETIES TOWARDS CHILLI LEAF CURL VIRUS AND ITS MANAGEMENT THROUGH VECTOR CONTROL

Pakistan Journal of Phytopathology ◽

10.33866/phytopathol.029.01.0304 ◽

2017 ◽

Vol 29 (1) ◽

pp. 17 ◽

Cited By ~ 1

Author(s):

Muhammad S. Hussain ◽

Khalid Naveed ◽

Muhammad Atiq

Keyword(s):

Disease Incidence ◽

Field Trials ◽

Local Germplasm ◽

Moderately Resistant ◽

Leaf Curl Virus ◽

Chilli Leaf Curl Virus ◽

Leaf Curl Disease ◽

Whitefly Vector ◽

Susceptible Response ◽

Leaf Curl

Chilli leaf curl virus (ChiLCV) is a serious problem for chilli production in Pakistan and India. In this study, fourteen different chilli lines / varieties were screened for their resistance/susceptibility towards ChiLCV in open field trials. Data of disease severity and disease incidence was recorded on weekly basis. Out of all varieties screened, Tatapuri Chilli and CH111 showed high susceptibility towards the chilli leaf curl disease. Talhari, CH 99, CH103, CH 106, CH107, CH108, CH109, GSL111 showed susceptible response whereas CBS1292 showed moderately susceptible response towards the disease. Only two cultivars Hybrid-46 and Hot Queen were found as moderately resistant. The screening experiment showed that most of the chilli varieties are susceptible to chilli leaf curl disease and resistance is lacking in local germplasm. Furthermore, three insecticides: Imidacloprid, Polo and Emamectin were tested for their efficacy for the management of disease and whitefly vector in field conditions at weekly intervals. Out of three insecticides, Polo gave best results as compared to Emamectin and Imidacloprid against chilli leaf curl disease and whitefly vector.

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