The tomato russet mite and its control.
Aculops (Vasates) lycopersici (Massee) was first noted in Bulgaria in 1961 on tomato in the greenhouse at Dimitrovgrad, and occasional mild infestations have since occurred there and at other localities. Infestation of tomato has also been seen at three localities in the field. All stages of the Eriophyid are described. In Bulgaria, it has so far been found only on tomato. It overwintered as an adult in the greenhouse, where, at 15-24°C and 70-80% relative humidity, the development of a single generation lasted 15-18 days. Development was more rapid at higher temperatures, and under optimum conditions there were seven generations or more a year. Sprays of lime-sulphur, colloidal sulphur or wettable sulphur (Tiozol) and an emulsion spray of endosulfan (Thiodan [endosulfan] 35) at 0.15-0.2% are advocated for control. Treatment should begin as soon as A. lycopersici appears and should be repeated at intervals of 20 days if required. If the plants have been sprayed with bordeaux mixture, lime-sulphur should not be used. If the greenhouse whitefly [Trialeurodes vaporariorum (Westw.)] is also present, endosulfan will control both pests. Petunias, on which A. lycopersici is reported from the literature, should not be raised in the greenhouse during the growing period, and weeds, especially species of Solanaceae, should be eliminated.