Oviposition Preference of the Soybean Looper (Lepidoptera: Noctuidae) Among Four Soybean Genotypes Differing in Larval Resistance

1988 ◽  
Vol 81 (1) ◽  
pp. 344-348 ◽  
Author(s):  
Mark R. Beach ◽  
James W. Todd
Keyword(s):  
Oviposition Preference ◽  
Soybean Genotypes ◽  
Soybean Looper ◽  
Lepidoptera Noctuidae

Soybean Looper (Lepidoptera: Noctuidae) Oviposition Preference Relative to Plant Development in Soybean and Cotton

1992 ◽  
Vol 27 (3) ◽  
pp. 217-223 ◽  
Author(s):  
C. M. Felland ◽  
R. P. Porter ◽  
H. N. Pitre
Keyword(s):  
Plant Development ◽  
Oviposition Preference ◽  
Growing Season ◽  
Pseudoplusia Includens ◽  
Canopy Closure ◽  
Oviposition Choice ◽  
Phenological Stages ◽  
Egg Density ◽  
Soybean Looper ◽  
Lepidoptera Noctuidae

Oviposition choice by soybean looper, Pseudoplusia includens (Walker), of soybean and cotton in two phenological stages was tested in field cages to determine relative oviposition preference for these two crops in a situation similar to early- to mid-season cropping conditions in Mississippi. Moths were released into field cages enclosing four contiguous rows for each of two treatments, and egg density per m of row was determined after the second night. Test 1 paired blooming cotton (planted 25 May) with either blooming (23 June) or vegetative (11 July) soybean. Relative to blooming cotton with 81.1% canopy closure, blooming soybean with 78% canopy closure received 2.6-fold greater oviposition, while vegetative soybean with 41% canopy closure received only 0.24-times the eggs as blooming cotton. Test 2 compared oviposition on the two soybean classes in the absence of cotton. Here, 11.2-fold more eggs were oviposited on blooming soybean than on vegetative soybean. Test 3 paired blooming soybean with either blooming or pre-bloom cotton (planted 23 June). Relative to soybean, the pre-bloom cotton with 68.7% canopy closure received 1.6-fold more eggs than blooming cotton, although neither cotton treatment received as many eggs as blooming soybean. This study suggests that the importance of cotton as a host of soybean looper declines as the crop growing season advances.

Preimaginal Development of Cotesia marginiventris (Hymenoptera: Braconidae) in Soybean Looper (Lepidoptera: Noctuidae) on Insect-Resistant Soybean Genotypes2

1991 ◽  
Vol 26 (4) ◽  
pp. 381-389 ◽  
Author(s):  
G. S. McCutcheon ◽  
M. J. Sullivan ◽  
S. G. Turnipseed
Keyword(s):  
Developmental Time ◽  
Cotesia Marginiventris ◽  
Soybean Genotype ◽  
Breeding Lines ◽  
Preimaginal Development ◽  
Soybean Genotypes ◽  
Glycine Max L ◽  
Soybean Looper ◽  
Lepidoptera Noctuidae ◽  
Resistant Genotypes

The preimaginal development of the parasitoid Cotesia marginiventris (Cresson) was observed in soybean looper, Pseudoplusia includens Walker, on different genotypes of soybean, Glycine max (L.) Merrill. Larvae were reared from eclosion on resistant soybean breeding lines, ED73-371 and D75-10230, both having PI 229358 as the resistance source, or on susceptible cultivars, ‘Bragg’ and ‘Braxton.’ Parasitized larvae consumed less foliage than nonparasitized larvae. Parasitized larvae, regardless of soybean genotype, also weighed less than nonparasitized larvae that fed on susceptible varieties. The developmental time of C. marginventris intrahost was not affected by the hosts' feeding on resistant germplasm. In field cages which contained only one of the soybean genotypes (no choice), parasitization of soybean looper among soybean genotypes was significantly greater in loopers collected from resistant genotypes for one generation during 1986. The resistant genotypes also had greater percentages of undeveloped parasitoids.

scholarly journals Antixenosis of bean genotypes to Chrysodeixis includens (Lepidoptera: Noctuidae)

2015 ◽  
Vol 50 (6) ◽  
pp. 450-458 ◽  
Author(s):  
Rafaela Morando ◽  
Edson Luiz Lopes Baldin ◽  
Patrícia Leite Cruz ◽  
André Luiz Lourenção ◽  
Alisson Fernando Chiorato
Keyword(s):  
Free Choice ◽  
Oviposition Preference ◽  
Green Light ◽  
Choice Test ◽  
Choice Tests ◽  
Dark Green ◽  
Soybean Looper ◽  
Lepidoptera Noctuidae ◽  
Light Green ◽  
Chrysodeixis Includens

The objective of this work was to evaluate bean genotypes for resistance to soybean looper (Chrysodeixis includens). Initially, free-choice tests were carried out with 59 genotypes, divided into three groups according to leaf color intensity (dark green, light green, and medium green), in order to evaluate oviposition preference. Subsequently, 12 genotypes with high potential for resistance were selected, as well as two susceptible commercial standards. With these genotypes, new tests were performed for oviposition in a greenhouse, besides tests for attractiveness and consumption under laboratory conditions (26±2ºC, 65±10% RH, and 14 h light: 10 h dark photophase). In the no-choice test with adults, in the greenhouse, the 'IAC Jabola', Arcelina 1, 'IAC Boreal', 'Flor de Mayo', and 'IAC Formoso' genotypes were the least oviposited, showing antixenosis-type resistance for oviposition. In the free-choice test with larvae, Arcelina 4, 'BRS Horizonte', 'Pérola', H96A102-1-1-1-52, 'IAC Boreal', 'IAC Harmonia', and 'IAC Formoso' were the less consumed genotypes, which indicates antixenosis to feeding. In the no-choice test, all genotypes (except for 'IAPAR 57') expressed moderate levels of antixenosis to feeding against C. includens larvae.

scholarly journals Interactions among insect-resistant soybean genotypes extracts with populations of Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) susceptible and resistant to its nucleopolyhedrovirus

2009 ◽  
Vol 81 (4) ◽  
pp. 861-871 ◽  
Author(s):  
Giorla C. Piubelli ◽  
Flávio Moscardi ◽  
Clara B. Hoffmann-Campo
Keyword(s):  
Control Diet ◽  
Harmful Effect ◽  
Anticarsia Gemmatalis ◽  
Pupal Weight ◽  
Leaf Extracts ◽  
Resistant Genotype ◽  
Biological Insecticide ◽  
Soybean Genotypes ◽  
Diet Control ◽  
Lepidoptera Noctuidae

Anticarsia gemmatalis nucleopolyhedrovirus (AgMNPV) is being used in Brazil as a biological insecticide. Host plant resistance of soybean to insects is been searched for and some authors have mentioned the interference of plant chemistry in virus efficiency. Interactions among soybean extracts of genotypes used as a source of resistance (PI 274454 and PI 227687) with different AgMNPV concentrations in populations of A. geatalis susceptible (S) and resistant (R) to the virus were studied at laboratory condition. Higher mortality was observed when larvae fed on diets with extracts of the soybean genotypes compared with those fed on a plain diet (control). The mean lethal concentration (LC50) was reduced about 10 ties in the S-population fed on diets containing PI 274454 extracts and different concentrations of AgMNPV, compared to control diet. Additive effect was predominantly observed when larvae fed on diets with extracts of soybean genotypes (PI 274454 and PI 227687) and AgMNPV for both larval populations. The pupal weight was negatively influenced by the extracts incorporated to the diets compared to control, for both larval populations, notably for R-population. The results suggest that, in general, leaf extracts of soybean resistant genotype did not cause any harmful effect on virus efficiency.

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