A differential interaction study of Bemisia tabaci Q‐biotype on commercial tomato varieties with or without the Mi resistance gene, and comparative host responses with the B‐biotype

Abstract

Three tomato varieties (Motelle, Ronita, and VFN8) bearing the Mi-1.2 gene providing resistance to nematodes Meloidogyne spp. and to the potato aphid Macrosiphum euphorbiae Thomas, and three varieties not bearing this gene (Moneymaker, Roma, and Río Fuego), were compared by choice assay for host preference using the Qbiotype of Bemisia tabaci (Gennadius). The most preferred hosts, determined by infestation levels and numbers of feeding adults were Moneymaker, Río Fuego and Roma, all of which were not carrying the Mi gene. Ronita and Motelle, both of which bore the Mi gene, were the least preferred hosts. In a no-choice assay, B. tabaci females laid a significantly lower number of eggs on the varieties that carried the Mi gene than on those lacking the gene. Differences were more dramatic when plants carrying the Mi gene were pooled together and compared with pooled plants without this gene. Significantly greater values were obtained for the Mi-lacking group for all parameters tested. Comparing these results with those from a previous study on the B-biotype of B. tabaci, Q-biotypes were found to produce higher daily infestation rates on most of the tomato varieties. When results from plants carrying Mi were pooled, they showed lower infestation levels of Q-biotypes than B-biotypes. The Q-biotype infested less Mi-plants and more non-Mi plants than B-biotype. Q-biotype females produced significantly less pupae than the B-biotype females on both groups of plants. These results suggest the existence of an antixenosis and antibiosisbased resistance to the Q-biotype of B. tabaci in Mi-bearing commercial tomato varieties, which is greater than that previously reported for the B-biotype.

Aleytrap: An instrumentation to handle adult whitefly, Bemisia tabaci, Gennadius

“…Host Method of observation Dharne and Kabre, (2009) Chili TMB (leaf turn method) Zabel et al (2001) Tomato NDM Gencsoylu (2009) Cotton TMB (leaf turn method) Ali et al (2004) Brinjal TMB (leaf turn method) Manzano et al (2003) Snap bean Cotyledonary leaf (leaf turn method) Akhtar et al (2004) Cotton TMB (leaf turn method) Sanchez-Pena et al (2006) Brinjal NDM Gupta and Pathak (2009) Black Gram NDM Byrne (2010) Poinsettia Leaf turn method Pasian et al (2000) Chrysanthemum and Gerbera Entire plant counting Castle et al (2009) Melon vine Fifth terminal leaf (leaf turn method) Lee et al (2002) Tomato NDM Sequeira and Naranjo (2008) Cotton Abaxial side of single leaf (leaf turn method) Alicai (1999) Sweet potato NDM Leite et al (2003) Brinjal TMB (leaf turn method) Nombela et al (2001) Tomato Counting on all leaves of each plant Mallah et al (2001) Cotton TMB (leaf turn method) Muniz et al (2002) Tomato and Pepper TMB (leaf turn method) Muqit et al (2008) Tomato NDM Rafiq et al (2008) Araceae, Asteraceae, Brassicaceae, Cucurbitaceae, Chinopodiaceae, Malvaceae, Meliaceae, Papilionaceae and Solanaceae NDM Leite et al (2005) Okra TMB (leaf turn method) Naranjo et al (2003) Cotton NDM *TMB-Top, middle and bottom, **NDM-No defined method.…”

Short communication. Effect of Bemisia tabaci biotype in the transmission of Tomato Yellow Leaf Curl Sardinia Virus (TYLCSV-ES) between tomato and common weeds

“…However, the S-biotype has only ever been recorded within a localised area near Malaga and only on Ipomoea indica (Banks et al, 1999). Muñiz (2000) and Nombela et al (2001) have reported differences between the host responses to B-and Q-biotypes of B. tabaci in common weeds (Datura stramonium L., Solanum nigrum, L., Brassica kaber (DC), Capsella bursa-pastoris L. and Malva parviflora L.) and tomato plants. Moreover, some differences in transmission efficiencies of the B. tabaci biotypes when transmitting TYLCV/TYLCSV from tomato to tomato have been already reported (Sánchez-Campos et al, 1999), but few experimental studies had been undertaken to date on the transmission of TYLCSV-ES (Sánchez-Campos et al, 2000).…”

Short communication. Effects of the plant growth stimulant SBPI on Bemisia tabaci Genn. (Homoptera: Aleyrodidae)

“…Five female adults of B. tabaci (B-biotype) were removed from a colony reared on tomato plants cv. Marmande, and placed into each of 10 clip-cages per assay (one cage per plant) attached to the under surface of one leaf (Nombela et al, 2001). Whiteflies were removed after 3 days, and eggs and dead individuals counted.…”