Leaf dipping as an environmental screening measure to test chemical efficacy against Bemisia tabaci on poinsettia plants

Abstract

ABSTRACT:The screening of potential chemicals for control of Bemisia tabaci on poinsettia (Euphorbia pulcherrima c.v. Lilo Pink) plants using a leaf dipping technique was investigated. All relevant B. tabaci lifestages (eggs, larvae and adults) were investigated. In leaf dipping tests, Certis spraying oil was the only compound to show potential to be used as a control agent against B. tabaci eggs, with 81% obtained mortality. Oberon resulted in no mortality of B. tabaci eggs in the reported experiments. Leaf dipping against second instar and adult B. tabaci proved more effective for all chemical products. Dipping techniques using Majestik, Certis spraying oil and Agri-50 E all resulted in high second instar larval mortality (93, 87 and 85.5 %, respectively). Certis spraying oil again resulted in a high efficacy against adult B. tabaci with 100 % mortality obtained. The potential of the various chemicals to be incorporated into integrated pest management strategies for the control of B. tabaci is discussed.

Efficacy Test of Bio-pesticides against Tobacco Whitefly Bemisia tabaci (Gennadius, 1889) on Tomato Plants in Nepal

“…Certis spraying oil (Petroleum oil 1ml/100ml water, Certis UK) resulted in high second instar larval mortality (93%). Certis spraying oil resulted in a high efficacy against adult B. tabaci with 100% mortality on Poinsettia plants (Cuthbertson et al 2009). The result of the Cuthbertson et al (2009) is not in support of the present study.…”

“…Certis spraying oil resulted in a high efficacy against adult B. tabaci with 100% mortality on Poinsettia plants (Cuthbertson et al 2009). The result of the Cuthbertson et al (2009) is not in support of the present study. Agricultural spray oil is effective against whiteflies however in combination with these insecticides was observed to be more effective (Mote 1978).…”

Chemical compatibility testing of the entomopathogenic fungus Lecanicillium muscarium to control Bemisia tabaci in glasshouse environment

“…Therefore, studies have tested the effect of dry insecticide L. muscarium could be applied sequentially with residue on fungal activity. In the current study, when Oberon, Savona, Certis spraying oil, Agri-50E and L. muscarium was applied to plants sprayed 24 h earlier Majestik for the control of B. tabaci with second instars again proving highly susceptible to fungal attack, as found by Cuthbertson et al ( , 2009b; Cuthbertson and Brown (2009). However, after application of Agri-50E commercially unacceptable foliage damage was recorded (Cuthbertson, A.G.S., personal observation).…”

How to Start with a Clean Crop: Biopesticide Dips Reduce Populations of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Poinsettia Propagative Cuttings

“…The results obtained are comparable to those obtained in other studies of B. tabaci on poinsettia: Petroleum oil products (Certis spray oil and Tri-Tek) applied as a foliar spray or as leaf dip caused high mortality of B. tabaci eggs, nymphs and adults, treatments of B. bassiana or insecticidal soap (Savona) were moderately effective, and a tank-mix of both Tri-Tek and B. bassiana also caused high mortality of B. tabaci eggs and nymphs [19,23,28]. Petroleum oil products kill pests by anoxia (suffocation), or through direct toxic effects [29].…”

“…Earlier research using leaf dips suggested that B. tabaci (cryptic species unknown) can be controlled by immersing poinsettia cuttings in reduced risk products and biopesticides such as insecticidal soap, petroleum oil or B. bassiana , causing high (up to 100%) mortality of first and second instar B. tabaci ; egg mortality was generally lower [11,23]. These trials were limited in scope and restricted to a laboratory assessment of efficacy on excised leaves.…”