Mısırda kullanılan bazı herbisitlerin şekerpancarında fitotoksik etkilerinin araştırılması

Atrazine, atrazine ve metholachlor karisimi, metholachlor-s, nicosulfuron ve foramsulfuron etkili maddeye sahip herbisitlerin sekerpancarina fitotoksik etkilerini belirlemek amaciyla tarla, saksi ve cimlendirme denemeleri kurulmustur. Soz konusu herbisitler, saksi denemelerinde kullanim dozunda, kullanim dozunun yarisi, 1/10’u, 1/50’si ve 1/100’u oraninda dozlarda, tarla denemesinde kullanim dozunun 2 kati, kullanim dozu, kullanim dozunun yarisi, 1/4’u ve 1/8’i dozlarda, cimlendirme denemelerinde ise kullanim dozunun 1/10’u, 1/50’si, 1/100’u ve 1/500’u oraninda dozlarda uygulanmistir. Tum herbisitler tohum cimlenme sayisini, sekerpancari yas, kuru ve kok agirligini etkilemistir. Ayrica, atrazine, atrazine+metolachlor etkili madde ile ilaclanan topraklara ekilen seker pancari yapraklarinda sararma, deformasyon ve kahverengilesme, bitki boylarinda kisalma, bitkilerin toprak ile birlestigi govde kisminda kahverengilesme gozlenmis olup bu kahverengilesen bolge zamanla govdede incelmeye neden olmus ve bu incelen bolgelerden bitkiler kirilarak olmustur.Abstract  Field, plot and germination trials were established to determine the phytotoxic effect of atrazine, nicosulfuron, foramsulfuron, metholachlor-s, atrazine plus metholachlor on sugar beet. These herbicides were applied at a standart herbicide rate, 1/2, 1/10, 1/50 and 1/100 rates of the standart dose in the plot trials, standart herbicide rate, 2x rates, 1/2, 1/4 and 1/8  rates of the standart dose in the field trials,  1/10, 1/50, 1/100 and  1/500 rates of the standart dose in the germination trials. The number of germinated seeds, the weight of dry, fresh and root were inhibited by all these herbicide residues in the soil. It has also been observed that low rates of atrazine and  atrazine  plus metolachlor have caused chlorosis, deformation and browning on leaves, stunting and browning in the lower stem of plants, these browning areas in time caused thinning and plants were broken from these areas and they finally died.