IMPACT OF SOYBEAN PHENOLOGY ON VELVETBEAN CATERPILLAR (LEPIDOPTERA: NOCTUIDAE): OVIPOSITION, EGG HATCH, AND ADULT LONGEVITY

1981 ◽  
Vol 113 (2) ◽  
pp. 113-119 ◽  
Author(s):  
F. Moscardi ◽  
C. S. Barfield ◽  
G. E. Allen
Keyword(s):  
Adult Emergence ◽  
Adult Mortality ◽  
Anticarsia Gemmatalis ◽  
Adult Longevity ◽  
Velvetbean Caterpillar ◽  
Egg Hatch ◽  
Female Age ◽  
Adult Females ◽  
Female Longevity ◽  
Lepidoptera Noctuidae

AbstractAdult females of the velvetbean caterpillar, Anticarsia gemmatalis Hübner, from larvae fed on progressively aged soybean, Glycine max (L.), foliage had variable reproductive characteristics. Mean oviposition rates ranged from 963.4 to 515.0 eggs/female when larvae fed on early vegetative and senescent leaves, respectively. Average daily oviposition peaked ca. 4 days after adult emergence, decreased sharply to day 10, and remained at a low level until adult mortality. Mean daily egg hatch decreased with female age, but female longevity was not affected significantly.

Multicellular Rearing Methods for the Beet Armyworm, Soybean Looper, and Velvetbean Caterpillar (Lepidoptera: Noctuidae)

1990 ◽  
Vol 25 (2) ◽  
pp. 336-340 ◽  
Author(s):  
G. G. Hartley
Keyword(s):  
High Volume ◽  
Beet Armyworm ◽  
Cotton Cloth ◽  
Anticarsia Gemmatalis ◽  
Velvetbean Caterpillar ◽  
Egg Hatch ◽  
Heliothis Spp ◽  
Rearing Methods ◽  
Soybean Looper ◽  
Lepidoptera Noctuidae

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.

Side-effects caused by chlorpyrifos in the velvetbean caterpillar Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Chemosphere ◽  
2020 ◽  
Vol 259 ◽  
pp. 127530 ◽  
Author(s):  
Angelica Plata-Rueda ◽  
Carlos Henrique Martins de Menezes ◽  
Weslei dos Santos Cunha ◽  
Thaiany Moreira Alvarenga ◽  
Bruno Franklin Barbosa ◽  
...  
Keyword(s):  
Side Effects ◽  
Anticarsia Gemmatalis ◽  
Velvetbean Caterpillar ◽  
Lepidoptera Noctuidae

Movement of Nuclear Polyhedrosis Virus into Velvetbean Caterpillar (Lepidoptera: Noctuidae) Larval Populations on Soybean by Nabis roseipennis (Heteroptera: Nabidae) Nymphs

1992 ◽  
Vol 27 (2) ◽  
pp. 126-134 ◽  
Author(s):  
S. Y. Young ◽  
W. C. Yearian
Keyword(s):  
Nuclear Polyhedrosis Virus ◽  
Larval Mortality ◽  
Anticarsia Gemmatalis ◽  
Velvetbean Caterpillar ◽  
Nabis Roseipennis ◽  
Polyhedrosis Virus ◽  
Soybean Plants ◽  
Nuclear Polyhedrosis ◽  
Mixed Age ◽  
Lepidoptera Noctuidae

Nabis roseipennis Reuter nymphs that preyed on larvae of the nuclear polyhedrosis virus (NPV) infected velvetbean caterpillar, Anticarsia gemmatalis (Hübner), excreted the virus (AgNPV) for several days thereafter. Based on bioassays, fifth instar and second instar nymphs excreted 84.7 × 105 and 9.7 × 105 polyhedral inclusion bodies (PIB) per nymph, respectively. The AgNPV-contaminated nymphs effectively disseminated the virus via the feces over soybean plants where it served as inoculum to initiate disease in larval populations of A. gemmatalis caged in the field. Larval mortality from AgNPV ranged from 11.4 to 48.5% over treatments in two tests. Larval mortality in treatments where the source of virus inoculum was AgNPV-contaminated fifth instar nymphs was similar to that in treatments where the source of viral inoculum was diseased larvae. Larval mortality resulting from AgNPV dissemination by the nymphs was usually higher in treatments containing fifth instar nymphs than in those with second instar nymphs. Dissemination of NPV by fifth instar nymphs was higher in mixed-age than in uniformed-age A. gemmatalis larval populations. This was not the case with the smaller second instar nymphs.

INFLUENCE OF INSECTICIDES - CYTOPLASMIC POLYHEDROSIS VIRUS COMBINATIONS ON PUPAL WEIGHT AND FECUNDITY OF TOBACCO BUDWORM (LEPIDOPTERA: NOCTUIDAE)

1989 ◽  
Vol 24 (4) ◽  
pp. 539-544 ◽  
Author(s):  
Abdul K. Mohamed ◽  
Jen-Rong Yang ◽  
Fred R. S. Nelson
Keyword(s):  
Heliothis Virescens ◽  
Methyl Parathion ◽  
Adult Emergence ◽  
Tobacco Budworm ◽  
Pupal Weight ◽  
Egg Hatch ◽  
Cytoplasmic Polyhedrosis Virus ◽  
Polyhedrosis Virus ◽  
Control Adult ◽  
Lepidoptera Noctuidae

Laboratory studies were conducted to determine the response of healthy and cytoplasmic polyhedrosis virus (CPV) infected Heliothis virescens (F.) larvae to LD50 of methomyl and methyl parathion. Methomyl-CPV combination adversely affected pupal weight and fecundity of the female. The effect of this interaction was synergistic. Exposure of CPV infected larvae to LD50 of methomyl resulted in a mean female pupal weight of 243 mg and a fecundity of 382 per female moth. These values were significantly lower than those of all other treatments. In contrast methyl parathion-CPV combinations did not result in a significant reduction in pupal weight as compared to the control. Adult emergence and egg hatch were not affected.

NUCLEAR POLYHEDROSIS VIRUS TRANSMISSION IN MULTIPLE GENERATIONS OF ANTICARSIA GEMMATALIS (LEPIDOPTERA: NOCTUIDAE) CAGED ON SOYBEAN

1989 ◽  
Vol 24 (1) ◽  
pp. 133-141
Author(s):  
S. Y. Young ◽  
W. C. Yearian
Keyword(s):  
Nuclear Polyhedrosis Virus ◽  
Larval Mortality ◽  
Virus Transmission ◽  
Anticarsia Gemmatalis ◽  
Velvetbean Caterpillar ◽  
Larval Population ◽  
Multiple Generations ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis ◽  
Lepidoptera Noctuidae

Transmission of a nuclear polyhedrosis virus (AgNPV) of the velvetbean caterpillar, Anticarsis gemmatalis Hübner, in multiple generations on caged soybeans was examined. Introduction of primary infected larvae into larval populations on soybean resulted in low levels of mortality in the initially uninfected population in generation one. Larval mortality levels increased in succeeding generations and were higher in treatments with greater larval population density. The increase in epizootic development was much less, however, when the plants were not infested for one larval generation. AgNPV concentrations on foliage and in soil generally reflected the mortality levels from AgNPV in the respective treatments.

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