Occurrence and larval movement of Diatraea saccharalis
 (Lepidoptera: Crambidae) in seed mixes of non-Bt
 and Bt
 pyramid corn

Wangila, David S.; Leonard, B. R.; Ghimire, Mukti N.; Bai, Yaoyu; Zhang, Liping; Yang, Yunlong; Emfinger, Karla; Head, Graham P.; Yang, Fei; Niu, Ying; Huang, Fangneng

doi:10.1002/ps.3484

Cited by 30 publications

(44 citation statements)

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“…Knowledge of oviposition behavior and larval movement of target pests is also useful for developing effective IRM strategies for Bt crops (Davis and Onstad, 2000;Mallet and Porter, 1992;Goldstein et al, 2010;Burkness et al, 2011;Ives et al, 2011;Onstad et al, 2011;Razze and Mason, 2012;Wangila et al, 2013). For example, if a target species prefers to oviposit more eggs on non-Bt corn than Bt corn plants, and if there is only limited movement of the insect, an RIB planting could be more effective in providing refuge populations compared to structured refuge plantings.…”

Section: Discussionmentioning

confidence: 97%

Performance of Agrisure®Viptera™ 3111 corn against Helicoverpa zea (Lepidoptera: Noctuidae) in seed mixed plantings

et al. 2015

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Section: Discussionmentioning

confidence: 97%

Performance of Agrisure®Viptera™ 3111 corn against Helicoverpa zea (Lepidoptera: Noctuidae) in seed mixed plantings

et al. 2015

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“…The advantages of RS in sequential feedings on non‐Bt and Bt plant tissue could have important implications for resistance management. In the field, maize borer larvae can feed and move frequently among plants, especially during the early larval stages (Ross & Ostlie, ; Mallet & Porter, ; Davis & Onstad, ; Bell et al., ; Goldstein et al., ; Burkness et al., ; Wangila et al., ; Oyediran et al., ). For example, Ross & Ostlie () reported that more than half of O. nubilalis neonates could abandon the primary host plants and disperse to other plants during the first 2 days after hatching.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, later stages of maize borer larvae (from third instars on) in the field also can move among plants (Mason et al., ). Field observations show that larvae of D. saccharalis and O. nubilalis have the ability to move across several plants within a row of plants as well as to adjacent rows (Mason et al., ; Davis & Onstad, ; Walker et al., ; Wangila et al., ; Oyediran et al., ). In either case, our results suggest that the larval dispersal behavior of maize borers could result in survival and successful reproduction of RS populations in seed mix plantings of non‐Bt and Bt maize plants even with high dose expression.…”

Section: Discussionmentioning

confidence: 99%

“…A seed mix strategy has been used to provide refuge to susceptible insects for resistance management in planting transgenic maize containing two or more pyramided Bacillus thuringiensis Berliner (Bt) genes in the USA (Matten et al, 2012). For the seed mix strategy, a defined percentage of non-Bt maize seeds is mixed with Bt maize seeds in each bag by seed companies prior to being sold to growers (Wangila et al, 2013). With the structured refuge method (Ostlie et al, 1997) that has been used for providing refuge to susceptible insects since 1996, the adult dispersal behavior of the target pest populations is important in resistance development, but with the seed mix, the major concern is that larval movement of the target insects among non-Bt and Bt plants may accelerate resistance evolution (Wangila et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…For the seed mix strategy, a defined percentage of non-Bt maize seeds is mixed with Bt maize seeds in each bag by seed companies prior to being sold to growers (Wangila et al, 2013). With the structured refuge method (Ostlie et al, 1997) that has been used for providing refuge to susceptible insects since 1996, the adult dispersal behavior of the target pest populations is important in resistance development, but with the seed mix, the major concern is that larval movement of the target insects among non-Bt and Bt plants may accelerate resistance evolution (Wangila et al, 2013). For example, larval movement between non-Bt and Bt plants in seed mix plantings may create a non-high dose environment that can be more favorable for survival of the resistant heterozygotes compared to the susceptible insects and thus hasten resistance development in the field (Wangila et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Performance of Cry1Ab‐susceptible and ‐heterozygous resistant populations of sugarcane borer in sequential feedings on non‐Bt and Bt maize plant tissue

Yang

Niu

Head

et al. 2016

Entomologia Exp Applicata

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A seed mix strategy has been used to provide refuge to susceptible insects for resistance management in planting transgenic maize expressing Bacillus thuringiensis Berliner (Bt) proteins. To determine whether larval movement in a seed mix planting creates favorable conditions for resistant heterozygotes of a target pest, performance of Cry1Ab-susceptible (SS) and -heterozygous resistant (RS) populations of the sugarcane borer, Diatraea saccharalis (Fabricius) (Lepidoptera: Crambidae), was evaluated in sequential feeding on non-Bt and Cry1Ab (event MON 810) maize plant tissue. For each insect population, nine feeding sequences were employed. SS and RS feeding on non-Bt plants for their entire larval stages survived well and >60% of the adult pairs produced viable eggs, with an average of 269 progeny per female, whereas none of the two populations on Bt maize plants survived to the pupal stage. SS larvae could not develop to adults if the larvae fed on non-Bt plants for ≤15 days and then moved to Bt plants. In contrast, 4.2-29.2% of RS larvae that fed on non-Bt plants for ≥9 days and then moved to Bt plants developed to adults, and 63.6% of pairs of these adults produced viable eggs, with an average of 185 progeny per female. For SS larvae that fed on Bt plants for 1 or 2 days and then moved to non-Bt plants, few larvae developed to adults with varied emergence times, whereas 28.1 and 13.5% RS larvae feeding on Bt plants for 1 and 2 days, respectively, successfully developed to adults; 43.8% of pairs of these adults produced viable eggs, with an average of 220 progeny per female. For the case of the single Bt gene maize plants (event MON 810), the results suggest that RS insects may have advantages in survival and reproduction over SS if RS larvae hatch and feed on Bt plants during the first 1 or 2 days and then move to non-Bt plants. This advantage is less for RS larvae that hatch and feed on non-Bt plants first and then move to Bt plants, unless the larval movement occurs in the later stages (e.g., fourth or fifth instars).

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Effects of intraguild interactions on Anticarsia gemmatalis and Chrysodeixis includens larval fitness and behavior in soybean

Ongaratto

Baldin

Hunt

et al. 2021

Pest Management Science

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BACKGROUND Crop pest management requires an understanding of the complex interactions among species that potentially impact crop yield. In soybean, the velvetbean caterpillar, Anticarsia gemmatalis (Hübner), and the soybean looper, Chrysodeixis includens (Walker), are described as key pests, sharing the same feeding guild. We assessed the intraguild interactions of these species under laboratory conditions. Fitness cost study was conducted to examine the influence of competition on insect development. A video tracking system was used to evaluate behavioral parameters during larval interactions in scenarios with and without food availability. RESULTS In the fitness cost assay, pupal weight was not significantly affected, regardless of sex. However, larval and pupal survival were influenced by the competition, especially in third versus fifth instar scenarios. We detected 40.00% cannibalism and 46.67% predation when A. gemmatalis and C. includens third instars competed with A. gemmatalis fifth instar, respectively. Distance moved, distance between larvae, body contact (food available) and frequency in food of C. includens larvae were negatively affected by interactions. Anticarsia gemmatalis larvae showed highly active behavior, moving twice or more the distance compared to C. includens larvae, and A. gemmatalis spent more time in body contact with food. CONCLUSION Our results suggest that A. gemmatalis has a competitive advantage over C. includens. This study provides important information regarding lepidopteran behavior in soybean. We recommended that additional studies are necessary to understand the effects of interactions, especially in field conditions. © 2021 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Occurrence and larval movement of Diatraea saccharalis (Lepidoptera: Crambidae) in seed mixes of non-Bt and Bt pyramid corn

Abstract: The results of this study show that refuge plants in a seed mixture may be able to provide a comparable refuge population of D. saccharalis to a structured refuge planting.

Cited by 30 publications

References 28 publications

Performance of Agrisure®Viptera™ 3111 corn against Helicoverpa zea (Lepidoptera: Noctuidae) in seed mixed plantings

Performance of Agrisure®Viptera™ 3111 corn against Helicoverpa zea (Lepidoptera: Noctuidae) in seed mixed plantings

Performance of Cry1Ab‐susceptible and ‐heterozygous resistant populations of sugarcane borer in sequential feedings on non‐Bt and Bt maize plant tissue

Effects of intraguild interactions on Anticarsia gemmatalis and Chrysodeixis includens larval fitness and behavior in soybean

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