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CHANGES IN GROWTH OF WHEAT PLANTLETS INDUCED BY THE ACTION OF THIAMETHOXAM AND THIOPHANATE-METHYL ON SEEDS
Autori: Daniela Nicuţă
Data aparitiei: January 2013
Revista: Environmental Engineering and Management JournalVol. 12Nr. 1
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.
Abstract
Pesticides can be considered useful to eliminate pests, but can also induce negative effects to the processes of germination, growth
and development of plants or disrupt some physiological and metabolic processes. By studying the effect of pesticides on treated
seeds germination, and determination of growth indices, it was possible to evaluate the positive or negative influence or toxicity
of the chemical compounds. The aim of this research is to highlight the effects of differentiated treatment with two types of
pesticides with their common name Actara 25 WG and Topsin AL 70 PU on germination, growth and development of wheat
plantlets. The experiment included 1300 wheat seeds which were divided into thirteen groups, the first group of 100 wheat seeds
was considered the control sample and the others were divided equally into twelve groups which were treated with three different
concentration dose of each pesticide, one less, one optimal, and one more compared to the optimal one for treatment, acting for a
period of 14 and 24 hours. Biometric examinations of seedlings were subjected to analysis of variance (ANOVA) followed by
Tukey’s B test and analysis of covariance (ANCOVA). The concentration of each pesticides and acting time may also influence
the allometric relationship between stem weights and stem length, root weight and number of roots, in different ways. It was
observed the existence of a relationship between pesticides concentration, exposure time and weight of steam, in case of Topsin
fungicide, under the influence of steam length, the observed power of this dependence being very high, 0.975.



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