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Cashew, Anacardium occidentale L. Anacardiaceaeis one of the most important sources of agricultural income in northeastern Brazil, but many of the arthropods associated with the crop have yet to be identified. We describe here for the first time the damage caused by Holopothrips fulvus Morgan Thysanoptera: Leaf tissue injuries were caused by the sucking mouthparts of the insect and were characterized by dark necrotic spots on the epidermis that resulted in yellowing, wilting and, ultimately, abscission of the leaves.
Additional information is given on the pest status and important aspects of the morphology of the insect, including sexual dimorphism, redescription of the adults and baizar of the second instar larvae. Anacardiaceaeis native to northeastern Brazil and constitutes one of the most important sources of agricultural income in this region.
The edaphoclimatic characteristics of the area favor vigorous growth of the trees and high yields of agircola, thereby facilitating the establishment of productive farming systems. The recent expansion of the cultivated area of dwarf-cashew has contributed to the emergence and multiplication of insect pests.
However, most of the arthropods entomloogia with cashew have been poorly studied and their taxonomic identification is largely unknown Mesquita and Braga-Sobrinho, One important pest that has received attention in Brazil is the red-banded thrips, Selenothrips rubrocinctus Giardwhich causes considerable damage to dwarf-cashew at the growing apices, inflorescences, peduncles and fruits Lima and Zucchi, ; Mesquita et al.
Holopothrips Hood is a Neotropical genus, with the exception of H.
Sixteen species were originally reported from Brazil ThripsWiki, Holopothrips species are phytophagous, and some species are known to cause leaf roll and deformation Cavalleri and Naixar, or induce galls Cabrera and Segarra, Some examples are H. Caryocaraceae ] in Amazonas Adis and Kerr, DC] infested by H.
Agricolz, little is known of the biology and host—plant relationships of many members of the genus Holopothripsand no information is available concerning the plant associations of around half of Brazilian Holopothrips species Zamora et al. The presence of H. Thrips were identified following Mound and Marullo However, since the descriptions provided by the original authors enfomologia not take into account some essential features currently used in the identification of thrips, we undertook a detailed examination of a number of individuals, including second instar larvae, and updated the original morphological description of H.
Moreover, preliminary observations indicate that populations of H. Damage caused by Holopothrips fulvus Morgan, on dwarf-cashew as shown A around the point of insertion baixqr the kernel into the pseudofruit; B at various points on baixqr leaf surface, resulting in yellowing, wilting and, ultimately, abscission; and C on inflorescences.
In common with other Holopothrips species, H. Furthermore, sutures on the pronotum of H. Interestingly, the color of the head seems to be subject to sexual dimorphism, since in males the brown area does not extend posterior to the compound eyes.
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Morphology of Holopothrips fulvus Morgan, Head constricted behind compound eyes; ocellar area with irregular striation, compound eyes with internal margin recurved close to hind ocelli; three pairs of ocellar setae, one pair of postocellar setae behind hind ocelli, three pairs of minor postocular setae behind eyes, median pair longer than laterals; maxillary bridge present.
Pronotum surface smooth, epimeral sutures not developed; five pairs of major setae present: Mesonotum surface reticulate, with sparse microtrichia-like structures on anterior third. Fore wing with six duplicated cilia on posterior margin at apex. Pelta broad, surface reticulate, bearing one pair of campaniform sensilla. Tergites II—VII with two pairs of wing-retaining setae in addition to one auxiliary pair; marginal pairs of setae 2 and entkmologia with apex expanded; tergite IX setae S1 with apex capitate, 0.
Similar to female but smaller and with agricolx pale mid-laterally; tergite VIII with paired transverse pore plates posteriorly. Body bicolored, mainly agrickla with light brown area between bases of antennae, legs suffused brown medially and abdominal segments IX—X brown; antennal segments I pale, II light brown on basal half and pale on apical half, III—VII brown; body setae light brown; entomologla on abdominal tergites emerging from brown rings.
Dorsal setae with expanded apex; ventral setae acute.
The authors declare that they have no conflicts of interest. Ver mais Siga-nos no: Artigo anterior Artigo seguinte.
Identification and pest status of Holopothrips fulvus Thysanoptera: Phlaeothripidae on dwarf-cashew crops in northeastern Brazil.
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Under a Creative Commons license. Additional information is given on the pest status and important aspects of the morphology of the insect, including sexual dimorphism, redescription of the adults and description of entomologiia second instar larvae.
Damage caused by H. A new gall-inducing species of Holopothrips Thysanoptera: Phlaeothripinae from Tabebuia trumpet trees in the Caribbean region.
A new Holopothrips species Thysanoptera: Phlaeothripidae damaging Mollinedia Monimiaceae leaves in southern Brazil. Zootaxa,pp.
O Campo, 6pp. A new leaf-galling Holopothrips Thysanoptera: Phlaeothripidae and the structural alterations on Myrcia retorta Myrtaceae. Seasonal damage caused by herbivorous insects on Caryocar brasiliense Caryocaraceae trees in the Brazilian savanna.
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Tripes-do-cacaueiro, Selenothrips rubrocinctus Giard. A new genus and five new species of Thysanoptera foreign to the United States. The thrips of Central and South America: Phlaeothripinae from leaf-vein galls on Piper species Piperaceae in Costa Rica.
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