Development of Dichelops furcatus (Hemiptera: Heteroptera: Pentatomidae) Reared on Spring Cereals Versus Soybean.

Antônio R Panizzi,Taynara Possebom,Tiago Lucini

doi:10.1093/jisesa/iey102

Antônio R Panizzi, Taynara Possebom + Show 1 more

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https://doi.org/10.1093/jisesa/iey102

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Abstract

The performance and preferences of the stink bug, Dichelops furcatus (F.), for spring cereals (wheat, rye, triticale, oat, and barley) were compared in the laboratory to their preferred host crop, soybean pods. Nymphs took significantly less time to reach adulthood on soybean pods compared to those fed seed heads of the five spring cereals tested. Wheat and rye yielded the longest developmental times, while nymphs fed triticale, oat, or barley developed faster, but still not as fast as those reared on soybean pods. On all foods ≥78% of nymphs reached adulthood. Adult body weight was significantly greater on soybean pods than on any of the spring cereals, and adults increased in body weight on all food sources tested. Fecundity was significantly greater for females fed soybean pods than those reared on the cereals. Egg viability was ≥66.9% except for bugs fed triticale (31.4%). In general, adult D. furcatus preferred soybean pods to seed heads of spring cereals, with wheat being preferred over the other spring cereals.

Highlights

The performance and preferences of the stink bug, Dichelops furcatus (F.), for spring cereals were compared in the laboratory to their preferred host crop, soybean pods
Wheat and rye yielded the longest developmental times, while nymphs fed triticale, oat, or barley developed faster, but still not as fast as those reared on soybean pods
Adult body weight was significantly greater on soybean pods than on any of the spring cereals, and adults increased in body weight on all food sources tested

Summary

Introduction

The performance and preferences of the stink bug, Dichelops furcatus (F.), for spring cereals (wheat, rye, triticale, oat, and barley) were compared in the laboratory to their preferred host crop, soybean pods. Nymphs took significantly less time to reach adulthood on soybean pods compared to those fed seed heads of the five spring cereals tested. Wheat and rye yielded the longest developmental times, while nymphs fed triticale, oat, or barley developed faster, but still not as fast as those reared on soybean pods. On wheat, green-belly stink bugs damage the booting and/or milk-grain stages resulting in discolored seed heads, and undeveloped and malformed grain (Panizzi et al 2016); eventually, this damage may be of concern to wheat growers. Several pentatomids are wheat pest in the United States, mainly Oebalus pugnax (F.) and Euschistus spp. (Buntin and Greene 2004, Koch et al 2016)

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