Báo cáo Nghiên cứu khoa học Spyllid

SPYLLID Damage  Both adults and nymphs of psyllid attack plant by sucking cell sap of the young shoots. Damage leaves become curly or distorted. Infested leaves and fruits may drop prematurely.  Psyllid’sucking can transmit the bacteria cause Greening Disease or Huanglongbing”(Liberobacter asiaticus)  A heavy sooty mold deposit can later develop on the honeydew of the psyllids. The dynamic of Psyllid population in year in South of Viet Nam  There is a relation closely between Psyllid population and number of young shoots. Most abundant population after every growth flush . However, the psyllid population also reduce when rainfall is too high  Using yellow bait to monitor the presence of adult psyllid in the orchard Natural enemies of insect pest on citrus The spotted ladybird (Hamonia conformis) feeding on aphids Larva Adult Ladybird Coccinella sp. Adult Larva Natural enemies are important in controlling citrus aphids – Parasites Lipolexis scutellaris Mackauer – Braconidae Parablatticida sp. – Encyrtidae Aphelinus gossypii Timbertake – Aphelinidae Wasp parasites in citrus maelybug (Planococcus citri) Wasp (Comperiella bifasciata) parasites of citrus red scale Wasps parasites of larva Psyllids(Diaphorinacitri)  Tamarixia radiata  Diaphorencytus aligarhensis Tamarixia radiata parasites in larvae Wasps become adults and their hole Wasps parasites of citrus leafminer  Ageniapis citricola – Encyrtidae  Sympiesis sp. – Eulophidae  Cirrospilus sp. – Eulophidae  Citrostichus phyllocnistoides – Eulophidae  Quadrastichus sp. – Eulophidae  Neochrysocharis sp. – Eulophidae  Eurytoma sp. - Eurytomidae Wasp Ageniasois citricola Parasites egg and larva develops feed and grow inside the larva leafminer Wasp adult Wasp (Sympiesis striatipes) Parasites egg and larva develops feed and grow inside the larva leafminer Adult Pupa Two species wasp parasite outside of larva leafminer Quadrastichus sp. (traùùi) & Citrostichus phyllocnistoides (phaûûi) Wasp (Teleopterus sp) Parasites egg and larva develops feed and grow inside the larva and pupa leafminer Predator “Green lacewing” (A. octopunctata & Chrysopa basalis) Predator Preying mantis LarvaEgg Predator Andrallus spinidens Predator Chrysosoma sp. Predator Red ant and Black ant Predator Damselfly The other predator