Densidade e tamanho de formigueiros de Acromyrmex crassispinus em plantios de Pinus taeda

Nickele, Mariane Aparecida; Filho, Wilson Reis; Oliveira, E. B. de; Iede, E. T.

doi:10.1590/s0100-204x2009000400003

Cited by 14 publications

(21 citation statements)

References 8 publications

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“…The first experiment was carried out at Rio Negrinho (26º15'16"S and 49º31'06"W, at a 790-m altitude) and Três Barras (26º06'23"S and 50º19'20 In the experimental areas, 4 and 11 nests per hectare were found, on average, in Rio Negrinho and Três Barras, respectively (Nickele et al, 2009), and no native vegetation was observed among the planting lines in the first month after planting, due to soil preparation for the planting of seedlings.…”

Section: Methodsmentioning

confidence: 99%

“…Acromyrmex crassispinus is the most common leaf-cutting ant species in southern Brazil (Rando & Forti, 2005), especially in P. taeda plantations located in northern Santa Catarina State (Nickele et al, 2009). This species causes high levels of damage, which can be attributed to the number of nests in the area and the high number of plant species that are attacked by those ants (Link et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Leaf-cutting ant attack in initial pine plantations and growth of defoliated plants

Nickele

Filho²,

Oliveira³

et al. 2012

Pesq. agropec. bras.

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-The objective of this work was to evaluate the natural attack by Acromyrmex crassispinus in initial Pinus taeda plantations without control measures against ants, as well as the effect of defoliation in seedlings of P. taeda. Evaluations of the attack of leaf-cutting ants on P. taeda plantations were done monthly in the first six months, then 9 and 12 months after planting. The percentages of plants that were naturally attacked by ants were registered. The effect of defoliation was evaluated by artificial defoliation, simulating the natural patterns of attack by A. crassispinus on P. taeda seedlings. The natural attack of A. crassispinus was greater during the first months after planting, being more intense in the first 30 days. Artificial defoliation indicated that there were no significant losses in diameter and height in plants with less than 75% defoliation. However, there were significant losses in diameter and height in plants with 100% defoliation, independently of the cut of the apical meristem, and also plant death. The control of leaf-cutting ants in P. taeda plantings, in which A. crassispinus is the most frequent leaf-cutting ant, should be intense only at the beginning of planting, since the most severe attacks occur during this time.Index terms: Acromyrmex crassispinus, Pinus taeda, artificial defoliation, forest pest. Ataque de formigas cortadeiras em plantios iniciais de pinus e crescimento de plantas desfolhadasResumo -O objetivo deste trabalho foi avaliar o ataque natural de Acromyrmex crassispinus em plantios iniciais de Pinus taeda sem controle contra formigas, bem como o efeito da desfolha em mudas de P. taeda. As avaliações do ataque de formigas cortadeiras em plantios de P. taeda foram realizadas mensalmente nos primeiros seis meses, depois aos 9 e 12 meses após o plantio. As percentagens de plantas naturalmente atacadas por formigas foram registradas. O efeito da desfolha foi avaliado por meio do desfolhamento artificial, ao se simularem os ciclos naturais de ataque de A. crassispinus em mudas de P. taeda. O ataque natural de A. crassispinus foi maior nos primeiros meses após o plantio, tendo sido mais intenso durante os primeiros 30 dias. A desfolha artificial indicou que não houve perdas significativas no diâmetro e na altura de plantas com menos de 75% de desfolha. No entanto, observaram-se perdas significativas no diâmetro e na altura de plantas 100% desfolhadas, independentemente do corte da gema apical, e também a morte de plantas. O controle de formigas cortadeiras em plantios de P. taeda, em que A. crassispinus é a formiga cortadeira mais frequente, deve ser intenso somente no início do plantio, pois os ataques mais severos ocorrem neste período.Termos para indexação: Acromyrmex crassispinus, Pinus taeda, desfolha artificial, praga florestal.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Leaf-cutting ant attack in initial pine plantations and growth of defoliated plants

Nickele

Filho²,

Oliveira³

et al. 2012

Pesq. agropec. bras.

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“…Leaf-cutting ants of the genera Atta and Acromyrmex are the main pests found in Pinus and Eucalyptus plantations [1][2][3]. The Atta build nests with hundreds of interconnected underground chambers and trails opening out at the soil surface [4].…”

Section: Open Accessmentioning

confidence: 99%

An Overview of Integrated Management of Leaf-Cutting Ants (Hymenoptera: Formicidae) in Brazilian Forest Plantations

Zanetti

Zanúncio

Santos

et al. 2014

Forests

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Brazilian forest producers have developed integrated management programs to increase the effectiveness of the control of leaf-cutting ants of the genera Atta and Acromyrmex. These measures reduced the costs and quantity of insecticides used in the plantations. Such integrated management programs are based on monitoring the ant nests, as well as the need and timing of the control methods. Chemical control employing baits is the most commonly used method, however, biological, mechanical and cultural control methods, besides plant resistance, can reduce the quantity of chemicals applied in the plantations.

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“…All nests were measured and the major axis length was taken as the approximated diameter of the nest. Nests were categorized into three size classes: Class I, up to 30 cm in diameter; Class II, between 31 and 60 cm, and Class III, more than 61 cm (Nickele et al, 2009). The evaluations of density and size of nests were performed monthly in the first year after planting, every three months until the third year and every six months until the plantation was six years old (from September 2007 until August 2013).…”

Section: Methodsmentioning

confidence: 99%

Population Dynamics of Acromyrmex crassispinus (Forel) (Hymenoptera: Formicidae) and Attacks on Pinus taeda Linnaeus (Pinaceae) plantations

Nickele

Filho

2015

Sociobiology

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This work aimed to study the population dynamics of Acromyrmex crassispinus (Forel) in Pinus taeda L. plantations, evaluating the density and spatial distribution of nests over time, inferring about the period of the first nuptial flight of A. crassispinus colonies, and evaluating the levels of attack of this leaf-cutting ant on P. taeda plants. Assessments were performed monthly in the first year after planting, every three months until the third year and every six months until the plantation was six years old. The presence of nests was observed only after 15 months after planting. The nest density gradually increased until the planting completed 30 months, and decreased when the forest canopy began to close (after 54 months). Spatial distribution of A. crassispinus nests was random. Probably, the first nuptial flight of an A. crassispinus colony occurs after the third year of the colony foundation. Pinus taeda plants were not attacked by A. crassispinus throughout the evaluation period. Then, when dealing with a replanting area of Pinus plantation, where the previous forest has not been subject to pruning nor thinning, the problem with A. crassispinus is almost null if the clearcutting and the new planting occur during the winter. In this case, leaf-cutting ants control can be alleviated and it is not necessary to carry out systematic control of ants where A. crassispinus is the predominant leaf cutting ant species. Acromyrmex crassispinus control should be done only if nests are located or if attacked plants by ants are detected.

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Densidade e tamanho de formigueiros de Acromyrmex crassispinus em plantios de Pinus taeda

Cited by 14 publications

References 8 publications

Leaf-cutting ant attack in initial pine plantations and growth of defoliated plants

Leaf-cutting ant attack in initial pine plantations and growth of defoliated plants

An Overview of Integrated Management of Leaf-Cutting Ants (Hymenoptera: Formicidae) in Brazilian Forest Plantations

Population Dynamics of Acromyrmex crassispinus (Forel) (Hymenoptera: Formicidae) and Attacks on Pinus taeda Linnaeus (Pinaceae) plantations

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