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EFFICIENCY DEGREE OF NEW INSECTICIDES ON WHITEFLY CONTROL IN LABORATORY TREATMENTS
Radoslav Sekulić
; Poljoprivredni fakultet Novi Sad
Sažetak
In laboratoy experiments in spring and summer 1974 efficency degree of new insecticides were tested on Whitefly and larve (T. vaporariorum Westw.) sultured on tomatoes. The list of insecticide treatments tested and results obtained are presented in five tables, however, it could be briefly summarized af follows: Imago stage was highly susceptible to a great number of insecticides tested. The best control was obtained with A-4784-A EC-50, chemical in 0,04% a. s. conc. Yt gave 100% control (mortality). The insecticides: metomil, naled, A-4784-A EC-50, trihlorfon, difentioat, hlortipen, and malation were effective only 89 % to 99%. After hours treatment the poorest control was given by trihalotiofos. Five days after treatment the contact-digestive effect on whitefly larvae was studied and we came to the following conclusion: the best but not adequate control was given with chemicals on the metilazinfosa, malationa, trihlorfona and naleda basis. They gave over 73% to over 84% mortality. A- 4784-A EC-50 chemicals were less effective, however trihalotiofos and mevinfos were hardly effective. 10 and 15 days after treatment the highest efficiency was obtained by metilazinfos in 0,05% a. s. conc. It caused 83% to over 86 mortality. Next to it were difentioat, hlortipen, malation and others.
Ključne riječi
Hrčak ID:
165244
URI
Datum izdavanja:
29.5.1975.
Posjeta: 869 *