Premium
The relationships between cacao viruses and their vectors: the feeding behaviowr of three mealybug (Hornoptera: Pseudococcidae) species
Author(s) -
ENTWISTLE P. F.,
LONGWORTH J. F.
Publication year - 1963
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1963.tb03762.x
Subject(s) - phloem , biology , mealybug , botany , pest analysis
SUMMARY In transverse sections of cacao stems, 164 of 345 stylets of Planococcoides (= Pseudo‐coccus) njalensis were seen to end in the phloem. Passage through the cortex was intra‐cellular and the stylets entered the phloem by avoiding the peripheral blocks of sclerenchyma. Stylets of Ferrisiana virgata , which transmits cacao viruses less readily than P. njalensis , were also seen in the phloem, but less often. Phenococcus madeiriensis , which is not a vector of cacao viruses, fed differently; of the few stylets seen in sections of stems none ended in the phloem, and, though its stylets are long enough to reach this tissue, they did not extrude for the full length when the mealybugs were fed on agar.