ABSTRACT Coptotermes testaceus (Linnaeus, 1758) is the most important species of heartwood termite of adult trees in forests planted in Brazil. This study aimed to characterize the injuries promoted by the heartwood termite C. testaceus in Tectona grandis commercial stands. Tree bark with extend carton material on the outside, forming external galleries and internal stem with a high termite infestation, was found in August 2018, in clonal plantations of T. grandis of 4.2 and 7.2-year of age. Internal injuries were characterized by galleries inside stem length with the presence of some soil, carton material, and termites inside the galleries. The damage by C. testaceus may not show external signs, and the injury was only detected during the harvesting process.

ABSTRACT Termites of the species Cornitermes cumulans (Kollar, 1832) were observed causing injuries in the stem of Tectona grandis in commercial forest plantations in Cáceres, Mato Grosso state, Brazil. C. cumulans forms galleries below the bark, at the heartwood/sap-wood interface of 1.8 years-old trees. This is the first occurrence of this type of injury in stem caused by C. cumulans in T. grandis in Brazil.

ABSTRACT The objective of this research is to report the occurrence of the nigra scale Parasaissetia nigra (Nietner, 1861) (Hemiptera: Coccidae) in mahogany (Khaya ivorensis) seedlings in a forest nursery in Mato Grosso state. In September 2017, the infestation was detected on the leaves and branches of the plants, causing injury and the death of the apical meristem and leaf curling symptoms. It was verified the symbiosis of P. nigra with ants, due to the sugary exudate. The chemical control was performed with insecticidal syrup and the proposed method was effective. This was the first reported occurrence of P. nigra on African mahogany in Brazil.

ABSTRACT Heterotermes longiceps termites was observed causing injuries in Tectona grandis plants in a forest plantation in Cáceres, Mato Grosso, Brazil. H. longiceps caused galleries below the bark, at the heartwood-sapwood interface, from the beginning of the root until approximately 1 m height tall and very infested plants has died. This is the first report of H. longiceps damage in teak in Brazil.