Recovering effect of biostimulant application on pumpkins (Cucurbita moschata Duchesne ex Poir.) treated with imazamox
The herbicides are powerful means for weed control in modern agriculture. However, in some cases they can negatively affect the crops, for example when herbicide selectivity is not sufficient. One suitable approach, aimed to improve recovery of herbicide-damaged crops, is the therapeutic application of biostimulants. The aim of our study was to evaluate the potential of the biostimulants Amino Expert® Impuls, Aminozol® and Terra-Sorb® Complex to ameliorate recovery of imazamox-damaged pumpkins plants. The experimental design included 5 treatments, performed in triplicate with size of each plot - 10 m2. Untreated plot (treatment 1) was accepted as a control. The treatment 2 represented imazamox application (trade name Pulsar® 40), applied at a rate of 1.00 L ha‑1 in ВВСН 13-15 (3rd true leaf on main stem unfolded of pumpkin plants). The treatments 3, 4 and 5 included two applications - first by imazamox at the same rate and timing as in treatment 2 and second - by the mentioned biostimulants seven days later at a rate of 3.00 mL da‑1 each. For fully removing the weed pressure to the crop, before planting of the plants, all experimental plots were covered with polyethylene much under which drop irrigation was done. The observations showed that the imazamox application caused a slight negative effect on pumpkins plants distinguished by yellowing and growth retardation, which was visible at the beginning of flowering. On the contrary, the plants received additional therapeutic application by Amino Expert® Impuls, Aminozol® and Terra-Sorb® Complex recovered faster and finally developed a higher number of fruits per plant with higher fruit weight as well as greater fruit yields.
Neshev, N., Balabanova-Ivanovska, D., Yanev, M., Mitkov, A. and Tonev, T. (2021). Recovering effect of biostimulant application on pumpkins (Cucurbita moschata Duchesne ex Poir.) treated with imazamox. Acta Hortic. 1320, 267-274
pumpkins, herbicide, biostimulants, yield