Labeling Bollworm and Tobacco Budworm Adults in Wild Geranium, Geranium dissectum with Rubidium and Strontium

E.A. Stadelbacher


 
ABSTRACT

The feasibility of marking the adult stage of Heliothis zea (Boddie) and H. virescens (F.) by treating Geranium dissectum L., a major wild host plant of the F1 larval generation of Heliothis in the Delta of Mississippi, with aqueous solutions of strontium chloride (SrCl2) and rubidium chloride (RbCl) was studied. Strontium chloride was 100% effective in marking Heliothis adults only when used as a foliar treatment G. dissectum at 108 kg/ha in the greenhouse. Rubidium chloride was 100% effective as a foliar spray in the greenhouse (27, 14, and 3 kg/ha) and in the field (12, 6, and 4 kg/ha). Soil applications of rubidium chloride in the greenhouse were 100% effective at 135 kg/ha, but only 86.4% and 30.0% of the moths were effectively marked at rates of 69 and 14 kg/ha, respectively. These results show that rubidium chloride can be used in the field to effectively mark Heliothis adults that develop on wild geranium.



Reprinted from 1988 Proceedings: Beltwide Cotton Production Research Conferences pp. 276 - 279
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998