The Position of the Rostralis of the California Red Scale Feeding on Lemons

Nelson, Howard D.

doi:10.1093/jee/36.5.750

Cited by 5 publications

(3 citation statements)

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“…according to Weber's method, which relies on the maxillary stylets for directional control. Other work on Aonidiella aurantii (Maskell) tends to confirm this, the maxillaries being described as closely united (Nel, 1932) and the rostralis apex (which will include mandibulars) being shown as straight and tapered (Nelson, 1943)--conditions also found in Drosicha stebbingi (Green) (Margarodidae) (Latif & Khan, 1960). Pesson (1944), in a study of four species of Coccoidea, described occasional individual maxillary movement during retraction but otherwise found progression to conform to Weber's method.…”

Section: Reviewmentioning

confidence: 73%

Directional control of the stylets in phytophagous Hemiptera

Pollard

1969

Proceedings of the Royal Entomological Society of London. Serie

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Section: Reviewmentioning

confidence: 73%

Directional control of the stylets in phytophagous Hemiptera

Pollard

1969

Proceedings of the Royal Entomological Society of London. Serie

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“…Although the ability of fragile Hemipteran mouthparts to penetrate great depths in hard tissues has often aroused the curiosity of entomologists, as a drilling feat the accomplishment is exceeded by man. Thus the ratio of bore to depth in the present deepest penetration of the earth's crust (three inches to 25 340 ft, i.e., 1 : 100000) (McWhirter & McWhirter, 1971) greatly exceeds that of even Coccid stylets with a ratio of approximately 1 : 1 000 (Baranyovits, 1953;Nelson, 1943).…”

Section: Depth Of Penetrationmentioning

confidence: 99%

Plant penetration by feeding aphids (Hemiptera, Aphidoidea): a review

Pollard¹

1973

Bull. Entomol. Res.

297

197

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The factors responsible for determining the host-plants and feeding sites of aphids, and the various probing activities (the role of the labium, stylet insertion, surface saliva deposition, the behaviour of the aphid, virus transmission) are examined. There is a brief review of stylet structure and movement and the possible sensory nature of these organs, followed by a detailed review of the characteristics of aphid stylet paths in plant tissues. The penetration of epidermis and vascular tissues is treated separately while that within the intermediate tissues is covered in relation to leaves and stems, roots, trees, galls and excised tissue as well as in separate sections on Aphis fabaeScopoli and Myzus persicae (Sulzer). Stylet destinations and behaviour in the sieve tubes are discussed together with general features such as rate and depth of penetration, guidance to the feeding site, effects of tissue hardness and stylet withdrawal. The ingestion rate of plant sap is reviewed and its constitution and importance examined together with the significance of artificial diets. The salivary secretions including sheaths and tracks, their functions and their role in the transference of material between aphid and host are dealt with. The nature of the physical and internal damage resulting from aphid feeding is briefly covered, and also some plant-insect interrelations. The aphid species whose stylets have been examined in plant tissue are listed.

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“…Susceptibility of different citrus varieties to infestation was positively correlated with the thickness of leaf cuticle and leaf epidermis; this correlation is not significant. Nelson (1943) stated that the rostrum of the red scale avoids the oil glands during feeding. E1-Keiy (1964) found a negative correlation between the n u m b e r of oil glands of different varieties of citrus and the degree of infestation by the black scale insect and that the varieties with thin cuticle were more susceptible than those with a thick one.…”

Section: Factors Affecting the Susceptibility O] Citrus Varieties To mentioning

confidence: 99%

POPULATION OF AONIDIELLA AURANTII ON CITRUS VARIETIES IN RELATION TO THEIR PHYSICAL AND CHEMICAL CHARACTERISTICS

Habib

Salama

Amin

1972

Entomologia Exp Applicata

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Different varieties of citrus exhibit a great variation in their susceptibility to infestation by the red scale, Aonidiella aurantii. Among the thirteen varieties investigated, mandarin clemantine, santara and baladi, orange baladi and rough lemon are the most resistant; while lemon baladi, sour orange and grapefruit are the most susceptible. The susceptibility to infestation decreases with the increase of oil glands in the leaves and fruits of citrus. The total amount of nitrogen, phosphorus and carbohydrates in the leaves of different varieties shows no correlation with their susceptibility to infestation. Résumé SENSIBILITÉ DE DIVERSES VARIÉTÉS DE CITRUS AUX INFESTATIONS PAR LA COCHENILLE ROUGE AONIDIELLA AURANTII Différentes variéTÉs de Citrus montrent de grandes variations dans leur sensibiliTÉ aux attaques par Aonidiella aurantii. Parmi les 13 variéTÉs étudiées, les plus résistantes sont: “mandarine clémentine”, “mandarine baladi” et “rough lemon”, tandis que “lemon baladi”; “sour orange” et “pamplemousse” sont les plus sensibles. La sensibiliTÉ aux infestations décroît proportionnellement avec l'accroissement du nombre des glandes à huiles essentielles sur les feuilles de citrus. La quantiTÉ totale d'azote, de phosphore et d'hydrates de carbone dans les feuilles des différentes variéTÉs ne montre aucune corrélation avec leur sensibiliTÉ aux infestations.

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The Position of the Rostralis of the California Red Scale Feeding on Lemons

Cited by 5 publications

References 0 publications

Directional control of the stylets in phytophagous Hemiptera

Directional control of the stylets in phytophagous Hemiptera

Plant penetration by feeding aphids (Hemiptera, Aphidoidea): a review

POPULATION OF AONIDIELLA AURANTII ON CITRUS VARIETIES IN RELATION TO THEIR PHYSICAL AND CHEMICAL CHARACTERISTICS

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