WebThe fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), is a highly polyphagous plant pest that can severely impact yields of several agricultural crops.... WebApr 10, 2024 · The following data were collected per plot by summing up the figures from the 20 plants: the number of egg masses; the number of larvae (non-destructively); crop damage, for which the Davis scale (from 0—no damage, to 9—heavy damage) was used to assess damage by FAW to maize plants; phytotoxicity, including modifications in color, …

Fall armyworm invasion heightens pesticide expenditure among …

Webwhich the 1-9 whorl leaf injury rating scale (Davis et al., 1992; Ni et al., 2011) is the mostly used one. It was felt that, the Davis 1-9 scale proposed by Davis et al. (1992) was … WebAs the larval size increases even more, the larvae begin to cut and tear apart the leaves (Davis Scale 6-9), creating a distinct pattern referred to as the whorlfeeding sign (see Chapter 2, Figure ... team black sheep simulator

Streamlining leaf damage rating scales for the fall

WebJOURNAL NAME: Open Access Library Journal, Vol.7 No.9, September 27, 2024. ABSTRACT: Since the report of the Fall armyworm (FAW) (Spodoptera frugiperda) in … WebJan 18, 2024 · The plants were visually rated for FAW injury, receiving scores from 1 to 9 according to the Davis scale (Davis et al. 1992 ). Evaluation of plant growth Five plants of each treatment were used as replicates for assessment of growth parameters of maize and correlate the effects of improved tolerance promoted by Si (hypotheses iii and iv). Weband Tifton, GA have screened maize for leaf-feeding resistance to the FAW for many years. Field screening techniques have been developed that have resulted in identifi-cation, development, and release of FAW leaf-feeding resistant maize germplasm (Davis et al. 1989, Williams & Davis 1989, and Widstrom et al. 1993). Occasionally, re- team blake foundation