DINÂMICA POPULACIONAL DE Saissetia oleae (HEMIPTERA: COCCIDAE) EM OLIVEIRAS

Abstract

RESUMO -A olivicultura é uma atividade recente no Rio Grande do Sul, com poucas informações sobre os insetos associados. A dinâmica populacional de Saissetia oleae (Oliver) e seu parasitismo natural foram avaliados em pomar de Olea europaea L., cultivar Arbequina, mantidos sob manejo convencional, situado em Caçapava do Sul (30°30′43″ S, 53°29′27″ O)-RS, Brasil. As amostragens foram mensais, de abril de 2012 a março de 2013. Em cada ocasião, em 20 plantas sorteadas, e dos quadrantes da copa (norte, sul, leste e oeste), foram retirados dois ramos aleatórios (20 a 30 cm de comprimento, com no mínimo 20 folhas), um interno e outro externo. A maior abundância de S. oleae foi na primavera e no verão, e a temperatura foi o fator que interferiu nesta dinâmica. Saissetia oleae distribuiu-se de forma uniforme entre os quadrantes e entre os ramos internos e externos da copa. Nas folhas, observou-se maior abundância de ninfas de primeiro e segundo instares, e nos ramos de ninfas de terceiro instar, adultos e adultos com ovos. A taxa de parasitismo foi de 3,40%. Termos para indexação: cochonilha-negra, dinâmica populacional, Olea europaea. POPULATION DYNAMICS OF Saissetia oleae (HEMIPTERA: COCCIDAE) ON OLIVE TREESABSTRACT -Oliviculture is a recent activity in Rio Grande do Sul with little information on associated insects. The population dynamics of Saissetia oleae (Oliver) and its parasitism was evaluated in olive orchard, Olea europaea L., cultivar Arbequina, kept under traditional management, situated in Caçapava do Sul (30°30′43″ S, 53°29′27″ W), RS, Brazil. Samples were monthly collected from April 2012 to March 2013. At each occasion 20 trees were randomly selected and, from each quadrant of their canopies (northern, southern, eastern and western) two branches (20 -30 cm -length and containingat least 20 leaves) were removed randomly, one inside and one outside the tree. The greater abundance of S. oleae was in the spring and summer and the temperature was the factor that interfered in this dynamic. Saissetia oleae was distributed in a uniform way between quadrant and between the internal and external branches. In the leaves were observed with greater abundance S. oleae of first and second nympal stages, while in the branches third instar nymphs, adults and adults with eggs. The parasitism rate was 3.40%.

Population Dynamic of Olive Black Scale, Saissetia oleae (Olivier) (Hemiptera: Coccidae) Infesting Olive Trees in Irrigated Farms in Matrouh Governorate, Egypt

“…Moreover, Badary (2010) reported that the population reached the maximum during mid of August and mid of September. These finding also agreed with those obtained by Souza et al (2015) who reported that the greater abundance of the black scale insect was in spring and summer months, but hey recorded three generation/ year on olive grown under irrigation system.…”

Diversity of scale insects (Hemiptera, Coccomorpha) in ten varieties of olive trees (Olea europaea L.) in Southern Brazil

“…The population dynamics of S. oleae and its parasitism was evaluated in "Arbequina", in olival situated in the municipality of Caçapava do Sul (30°30′43″ S, 53°29′27″ W), Rio Grande do Sul/ BR, collected from April 2012 to March 2013. The greater abundance was in the spring and summer, the temperature was the factor that interfered in this dynamic and the parasitism rate was 3.40% (Souza et al 2015).…”

Population Fluctuation of Selenaspidus articulatus Morgan (Hemiptera: Diaspididae) in Rubber Tree

“…In this case, the physiological conditions of the plant may have influenced the West Indian red scale cochineal population. According to Souza et al (2015), temperature is the factor that most affects the population size of S. oleae. However, this climatic factor apparently did not influence the West Indian red scale cochineal population in rubber tree.…”