New Traps Cut Off Citrus Greening Pests from Hiding Places

2020 ◽  
Vol 31 (5) ◽  
pp. 240-240
Keyword(s):  
Salivary Glands ◽  
Citrus Fruit ◽  
Citrus Greening ◽  
Asian Citrus Psyllid ◽  
Diaphorina Citri ◽  
Citrus Greening Disease ◽  
Greening Disease ◽  
Citrus Leaves ◽  
Bitter Fruit ◽  
Production Losses

Adult Asian citrus psyllid, Diaphorina citri, carries the bacterium thought to be the causal agent of Huanglongbing in its salivary glands. As it feeds on citrus leaves, the psyllid transmits the bacterium to the tree. The result is yellowed leaves, bitter fruit, and eventual tree death. Researchers across the nation are struggling to end the scourge of citrus greening disease, also known as huanglongbing. The disease renders citrus fruit inedible and eventually kills entire orchards. In Florida alone, from 2012?2016 the disease caused production losses of $4.4 billion and eliminated about 7,900 jobs.

scholarly journals Asian citrus psyllid adults inoculate huanglongbing bacterium more efficiently than nymphs when this bacterium is acquired by early instar nymphs

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
El-Desouky Ammar ◽  
Justin George ◽  
Kasie Sturgeon ◽  
Lukasz L. Stelinski ◽  
Robert G. Shatters
Keyword(s):  
Latent Period ◽  
Salivary Glands ◽  
Emerging Adults ◽  
Citrus Greening ◽  
Asian Citrus Psyllid ◽  
Diaphorina Citri ◽  
Citrus Greening Disease ◽  
Early Instar ◽  
Liberibacter Asiaticus ◽  
Greening Disease

Abstract The Asian citrus psyllid (Diaphorina citri) transmits the bacterium ‘Candidatus Liberibacter asiaticus’ (CLas), which causes huanglongbing (citrus greening) disease, in a circulative-propagative manner. We compared CLas inoculation efficiency of D. citri nymphs and adults into healthy (uninfected) citron leaves when both vector stages were reared from eggs on infected plants. The proportion of CLas-positive leaves was 2.5% for nymphs and 36.3% for adults. CLas acquisition by early instar nymphs followed by dissections of adults and 4th instar nymphs revealed that CLas bacterium had moved into the head-thorax section (containing the salivary glands) in 26.7–30.0% of nymphs and 37–45% of adults. Mean Ct values in these sections were 31.6–32.9 and 26.8–27.0 for nymphs and adults, respectively. Therefore, CLas incidence and titer were higher in the head-thorax of adults than in nymphs. Our results suggest that following acquisition of CLas by early instar D. citri nymphs, emerging adults inoculate the bacteria into citrus more efficiently than nymphs because adults are afforded a longer latent period necessary for multiplication and/or translocation of CLas into the salivary glands of the vector. We propose that CLas uses D. citri nymphs mainly for pathogen acquisition and multiplication, and their adults mainly for pathogen inoculation and spread.

scholarly journals Chitin biosynthesis genes in Diaphorina citri, Asian citrus psyllid

2020 ◽  
Author(s):  
Sherry Miller ◽  
Teresa D. Shippy ◽  
Blessy Tamayo ◽  
Prashant S Hosmani ◽  
Mirella Flores-Gonzalez ◽  
...  
Keyword(s):  
Pest Control ◽  
Normal Development ◽  
The Other ◽  
Chitin Synthase ◽  
Citrus Greening ◽  
Asian Citrus Psyllid ◽  
Diaphorina Citri ◽  
Chitin Synthesis ◽  
Citrus Greening Disease ◽  
Greening Disease

AbstractThe polysaccharide chitin is critical for the formation of many insect structures, including the exoskeleton, and is required for normal development. Here we report the annotation of three genes from the chitin synthesis pathway in the Asian citrus psyllid, Diaphorina citri (Hemiptera: Liviidae), the vector of Huanglongbing (citrus greening disease). Most insects have two chitin synthase (CHS) genes but, like other hemipterans, D. citri has only one. In contrast, D. citri is unusual among insects in having two UDP-N-acetylglucosamine pyrophosphorylase (UAP) genes. One of the D. citri UAP genes is broadly expressed, while the other is expressed predominantly in males. Our work helps pave the way for potential utilization of these genes as pest control targets to reduce the spread of Huanglongbing.

scholarly journals Biology and Management of the Asian Citrus Psyllid, Diaphorina citri Kuwayama, in Florida Citrus

EDIS ◽  
2007 ◽  
Vol 2007 (11) ◽  
Author(s):  
Michael E. Rogers ◽  
Philip A. Stansly
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Pathogen Transmission ◽  
Citrus Greening ◽  
Asian Citrus Psyllid ◽  
Diaphorina Citri ◽  
Feeding Damage ◽  
Citrus Greening Disease ◽  
Greening Disease ◽  
Florida Citrus

ENY-739, a 7-page illustrated fact sheet by Michael E. Rogers and Philip A. Stansly, provides information about the biology of this vector of citrus greening disease to aid growers in implementing integrated pest management (IPM) practices for suppressing the population in citrus-growing areas of Florida. It includes sections on identification and biology, psyllid feeding damage, pathogen transmission, management, and selected references. Published by the UF Department of Entomology and Nematology, June 2006.

scholarly journals Annotation of chitin biosynthesis genes in Diaphorina citri, the Asian citrus psyllid

Gigabyte ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Sherry Miller ◽  
Teresa D. Shippy ◽  
Blessy Tamayo ◽  
Prashant S. Hosmani ◽  
Mirella Flores-Gonzalez ◽  
...  
Keyword(s):  
Pest Control ◽  
Normal Development ◽  
The Other ◽  
Chitin Synthase ◽  
Citrus Greening ◽  
Asian Citrus Psyllid ◽  
Diaphorina Citri ◽  
Chitin Synthesis ◽  
Citrus Greening Disease ◽  
Greening Disease

The polysaccharide chitin is critical for the formation of many insect structures, including the exoskeleton, and is required for normal development. Here we report the annotation of three genes from the chitin synthesis pathway in the Asian citrus psyllid, Diaphorina citri (Hemiptera: Liviidae), the vector of Huanglongbing (citrus greening disease). Most insects have two chitin synthase (CHS) genes but, like other hemipterans, D. citri has only one. In contrast, D. citri is unusual among insects in having two UDP-N-acetylglucosamine pyrophosphorylase (UAP) genes. One of the D. citri UAP genes is broadly expressed, while the other is expressed predominantly in males. Our work helps pave the way for potential utilization of these genes as pest control targets to reduce the spread of Huanglongbing.

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