Susceptibility of the Velvetbean Caterpillar and Soybean Looper (Lepidoptera: Noctuidae) to Nomuraea rileyi: Effects of Pathotype, Dosage, Temperature, and Host Age

Methods used for rearing Heliothis spp. larvae in a multicellular container were modified for rearing beet armyworm (BAW), Spodoptera exigua (Hübner), soybean looper (SBL), Pseudoplusia includens (Walker), and velvetbean caterpillar (VBC), Anticarsia gemmatalis (Hübner). Polyester-cotton cloth used for Heliothis oviposition was unsatisfactory for BAW, SBL, and VBC. A polyester-cotton cloth with a dimpled surface was discovered which was suitable for all three species. Beet armyworm eggs were removed from the oviposition cloth and disinfected with sodium hypochlorite. This procedure could not be used for SBL or VBC as it resulted in significant reduction in egg hatch. New methods were developed for placing BAW, SBL, and VBC eggs into a multicellular container. A separator and high volume blower used to harvest Heliothis pupae was also used to harvest BAW and VBC pupae. SBL pupae, because of webbing spun by the larvae prior to pupation, could not be harvested in this manner. A pupal harvest method was developed for SBL. A phosphoric-propionic acid mix incorporated into the larval diet controlled contaminants. These procedures have been used since 1986 at Stoneville and more than ¾ million pupae and 100 million eggs were reared in 1987 and 1988.

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Discrete and Interactive Effects of Plant Resistance and Nuclear Polyhedrosis Viruses for Suppression of Soybean Looper and Velvetbean Caterpillar (Lepidoptera: Noctuidae) on Soybean

Journal of Economic Entomology ◽

10.1093/jee/81.2.684 ◽

1988 ◽

Vol 81 (2) ◽

pp. 684-691 ◽

Cited By ~ 6

Author(s):

Mark R. Beach ◽

James W. Todd

Keyword(s):

Plant Resistance ◽

Interactive Effects ◽

Velvetbean Caterpillar ◽

Nuclear Polyhedrosis ◽

Soybean Looper ◽

Lepidoptera Noctuidae

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Elucidating Efficacy of Ingested Positively Charged Zein Nanoparticles Against Noctuidae

Journal of Economic Entomology ◽

10.1093/jee/toaa199 ◽

2020 ◽

Vol 113 (6) ◽

pp. 2739-2744

Author(s):

Colin A R Bonser ◽

Xuan Chen ◽

Carlos E Astete ◽

Cristina M Sabliov ◽

Jeffrey A Davis

Keyword(s):

Pest Management ◽

Heliothis Virescens ◽

Tobacco Budworm ◽

Anticarsia Gemmatalis ◽

Velvetbean Caterpillar ◽

Soybean Looper ◽

Lepidoptera Noctuidae ◽

Positively Charged ◽

Chrysodeixis Includens ◽

Meridic Diet

Abstract A meridic diet overlay bioassay using empty, positively charged zein nanoparticles ((+)ZNP) was performed on soybean looper (Chrysodeixis includens (Walker)), tobacco budworm (Heliothis virescens (F.)), and velvetbean caterpillar (Anticarsia gemmatalis Hübner) (Lepidoptera: Noctuidae). Assessment of effects on mortality and development weights 7 d after ingestion of (+)ZNP were evaluated on larvae of each species. Treatments involved different concentrations, with H. virescens and A. gemmatalis offered 0 and 3,800 ppm (+)ZNP, whereas C. includens colonies were offered 0, 630, 1,260, and 2,520 ppm (+)ZNP. Mortality of A. gemmatalis and C. includens increased after ingestion of the highest (+)ZNP concentrations, while H. virescens neonate mortality was unaffected. Neonate and third-instar weights of A. gemmatalis and C. includens, and neonate H. virescens, decreased with high (+)ZNP concentrations. Following mortality results from A. gemmatalis neonates, a concentration response test was performed using a range of (+)ZNP concentrations. The LC50 for A. gemmatalis was 1,478 ppm. The potential of (+)ZNP as a pest management tactic is discussed.

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