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20 results on '"Huang, Zong‐You"'

2. Host location of gall parasitoids—A case study using the Quadrastichus mendeli–Leptocybe invasa system.

Author

Huang, Zong‐You, Tang, Liu‐Hang, Wang, Xiao‐Yun, Lu, Wen, and Zheng, Xia‐Lin

Subjects
*EULOPHIDAE, *HYMENOPTERA, *INSECTS, *MYRTACEAE, *PARASITOIDS, *EUCALYPTUS, *CIRCADIAN rhythms
Abstract

Galls are thought to be induced by insects for protection, yet many gall‐forming insects experience heavy parasitization. Little is known about how parasitoids locate gall‐forming insects. Quadrastichus mendeli Kim & La Salle (Hymenoptera: Eulophidae) is an obligate ectoparasitoid of the larvae of Leptocybe invasa Fisher et La Salle (Hymenoptera: Eulophidae), which is an invasive gall‐forming pest in eucalyptus (Eucalyptus spp., Myrtaceae) plantations. In this study, Q. mendeli and L. invasa were used to explore parasitoid behavior when locating gall‐forming insects. Our results revealed that host location by Q. mendeli involved five discrete steps: walking, resting or grooming, antennating, probing and stinging. Antennation was the most frequent behavior, accounting for about half of the total time. Host location behavior of Q. mendeli occurred in the photophase. Female Q. mendeli exhibited a clear circadian rhythm: Almost all behaviors occurred during the photophase, and behavior peaked at the sixth hour of the light phase. The olfactory response rates of Q. mendeli to volatiles from galls decreased significantly after their antennae were detached. However, there was no significant difference in the host location behavior of Q. mendeli after their eyes were obscured. Our results provide essential information to explore the host location mechanisms in gall parasitoids. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Parasitoids of the eucalyptus gall wasp Leptocybe invasa (Hymenoptera: Eulophidae) in China

Author

Zheng Xia-Lin, Huang Zong-You, Dong Dan, Guo Chun-Hui, Li Jun, Yang Zhen-De, Yang Xiu-Hao, and Lu Wen

Subjects
Forestry pest, Gall-inducing insect, Biological control, Parasitoids, Infectious and parasitic diseases, RC109-216
Abstract

Leptocybe invasa Fisher & La Salle (Hymenoptera, Eulophidae) is an invasive pest in Eucalyptus plantations throughout the world. Potential biological control agents for L. invasa were investigated in the Fujian, Guangdong, Hainan, Guangxi, Jiangxi, and Sichuan provinces of China, where Eucalyptus spp. have been severely damaged by the eucalyptus gall wasp. Three hymenopteran parasitoids of L. invasa were identified: Quadrastichus mendeli Kim & La Salle (Eulophidae), Aprostocetus causalis La Salle & Wu (Eulophidae), and Megastigmus viggianii Narendran & Sureshan (Torymidae); M. viggianii is newly recorded in China. The percentages of parasitization by Q. mendeli, A. causalis, and M. viggianii were 2.96%–19.53%, 2.30%–26.38%, and 24.93%, respectively. The longevity and body length of females were significantly greater than for males in A. causalis and M. viggianii. No males of Q. mendeli were found in China. These parasitoids could be used as biological agents for L. invasa in China.

Published
2016
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11. Cold hardiness of Phauda flammans (Lepidoptera: Zygaenidae) larvae

Author

Zheng, Xia-Lin, Liu, Jun-Yan, Huang, Zong-You, Meng, Ling-Yu, Li, Jun, and Lu, Wen

Subjects
Artikkelit
Abstract

This study aimed to determine the cold hardiness of Phauda flammans (Lepidoptera: Zygaenidae) larvae. Supercooling points of the 1st–6th instar larvae of P. flammans ranged from –7.7 to –13.0 °C. The lethal temperatures were –8 °C for 1st, –5 °C for 2nd, and –7 °C for 3rd–6th instars. Lethal times at the instar-specific lethal temperatures were 12 h for 1st, 14 h for 2nd, 15 h for 3rd, 17 h for 4th, and 18 h for 5th–6th instars. The times required for all larvae to die in an incubator at 5 °C were 30 d for 1st, 3rd, 4th, and 5th instars, and 25 d for 2nd and 6th instars. The findings suggest that P. flammans is a chill-intolerant species, and larvae will die if the air temperature decreases to –5 to –8 °C for 12–18 h or to 5 °C for 25–30 d. Such conditions are, however, unlikely to occur in southern China.

Published
2017

17. Review of reproductive behavior in Diaphorina citri(Kuwayama) (Homoptera: Liviidae)

Author

Li, Hai-Lin, Zheng, Xia-Lin, Huang, Zong-You, and Lu, Wen

Abstract

Diaphorina citri(Kuwayama) (Homoptera: Liviidae) is an important vector of citrus Huanglongbing, a serious threat to the development of citrus industry in China. Studies on the reproductive behavior of D. citricould contribute to understanding the crucial time to centrally control D. citriadults. The latest research results on the reproductive behavior of D. citriin recent years were reviewed, including the behaviors and mechanisms of the location and recognition of conspecific adults, mating choices, mating, and oviposition. The relationship between reproductive and flight behaviors and the rhythm of flight needs further study to explore the infestation regularity of D. citriand provide helpful information to develop integrated pest management strategies. It is expected that the review of reproductive behavior of D. citriwill provide reference for scientific research, population monitoring, and comprehensive management of D. citriin China.

Published
2020
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20. Parasitoids of the eucalyptus gall wasp Leptocybe invasa(Hymenoptera: Eulophidae) in China

Author

Zheng, Xia-Lin, Huang, Zong-You, Dong, Dan, Guo, Chun-Hui, Li, Jun, Yang, Zhen-De, Yang, Xiu-Hao, and Lu, Wen

Abstract

Leptocybe invasaFisher & La Salle (Hymenoptera, Eulophidae) is an invasive pest in Eucalyptusplantations throughout the world. Potential biological control agents for L. invasawere investigated in the Fujian, Guangdong, Hainan, Guangxi, Jiangxi, and Sichuan provinces of China, where Eucalyptusspp. have been severely damaged by the eucalyptus gall wasp. Three hymenopteran parasitoids of L. invasawere identified: Quadrastichus mendeliKim & La Salle (Eulophidae), Aprostocetus causalisLa Salle & Wu (Eulophidae), and Megastigmus viggianiiNarendran & Sureshan (Torymidae); M. viggianiiis newly recorded in China. The percentages of parasitization by Q. mendeli, A. causalis, and M. viggianiiwere 2.96%–19.53%, 2.30%–26.38%, and 24.93%, respectively. The longevity and body length of females were significantly greater than for males in A. causalisand M. viggianii. No males of Q. mendeliwere found in China. These parasitoids could be used as biological agents for L. invasain China.

Published
2016
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