|
|
Plevele v kukuřici a možnosti jejich regulace
Vaida, Matěj
The bachelor thesis deals with weed problems and possibilities of their control in maize. In the experimental part, a small-plot field trial was evaluated, which compares the biological effectiveness of different herbicides on selected weed spectrum. The results show that weed control in maize is possible to use different active ingredients applied in different application terms - pre-emergence, early post-emergence and post-emergence. The yield of maize grain on all herbicide-treated variants was comparable to the mechanically deflated variant. On the untreated variant there was a statistically significant decrease in yield.
|
|
|
Vliv agrotechnických faktorů na výskyt plevelů v kukuřici a možnosti jejich regulace
Sittová, Marie
Several corn experiments were established in 2014 in two locations (Žabčice, Kobylnice). The goal was to evaluate the weed infestation in corn after a different previous crop and a different tillage method, to focus on the dynamic growth of corn biomass and significant types of weeds under various intensities of weed infestation and to compare the effectiveness of applied herbicides in relation to the crop's yield. The number of individual types of weeds in the experiments with differing seeding procedures and tillage was established with the help of numeric methods. It was shown that the previous crop and tillage had an effect on the presence of weeds in corn. The greatest weed infestation was seen in the corn grown in monoculture and using plough-method tillage. The most significant weeds in corn were Echinochloa crus-galli, Chenopodium album and Amaranthus retroflexus. Different intensities of weed infestation had an effect on the growth of weed and crop biomass. The effectiveness of applied herbicides was evaluated with the help of estimation. The STORY + MILAGRO EXTRA 6 OD preparations showed good activity on the rated weeds; they were applied on the option that had the second highest yield of corn from all the options. Options with postemergent application of herbicides had a higher average yield of corn than options treated in postemergence only partially.
|
|
| |
|
|
Germination seeds by different temperature conditions
MACHOVÁ, Miroslava
This thesis deals with the biology, occurrence, harmfulness and control selected weed. The thesis aims to process the selected weeds in stands of cultivated crops overview of the biology, extension and suggest regulatory measures for especially dangerous weeds on arable land as for example Redroot pigweed (Amaranthus retroflexus L.), Cleavers (Galium aparine L.), Field pennycress (Thlaspi arvense L.), Shepherd's purse (Capsella bursa-pastoris L.) and Gallant soldier (Galinsoga parviflora Cav.).For selected species was determined germination seeds by different temperature conditions and by different seed depth.
|
|
|
Biology, occurrence and control of weeds in crops of root crops
CHODL, Tomáš
The aim of the present diploma thesis is to widen knowledge of the chemical regulation of weeds in row crops. To establish the effectiveness of herbicides, we set up a small lot at a carefully chosen spot in the potato-growing region near Strakonice. We conducted a comparison of the effects of three herbicide combinations on two potato varieties (Red Anna, Laura). Two combinations proved pre-emergent (Afalon 45 SC+Command 36 SC; Sencor 70 WG+Command 36 SC), one post-emergent (Titus 25 WG). Subsequently, we evaluated economic costs on weeds regulation and suggested preliminary measures to be taken.
|
|
|
Biology and control of Redroot pigweed (Amaranthus retroflexus L.) on arable land
BENDÍK, Jiří
This work is focused on pigweed species-related issues, particularly those of redroot pigweed (Amaranthus retroflexus L.), including biology, occurrence, harmfulness, spreading and possibilities to regulate the plant, which, nowadays, ranks among very dangerous and constantly spreading weed species. I therefore monitored the frequency of occurrence of redroot pigweed and other weed species grown on experimental plots during the maize vegetation season, and the effectiveness of weed regulation efforts through three registered herbicides, namely Adengo, Milagro and Callisto 480 SC. All three herbicides were appreciably very effective on redroot pigweed and delivered results proved the necessity of applying herbicides to control weed populations in today?s agricultural practices. In this respect, it can indeed be noted that a long-term regulation must be based on principles of good agro-technology practices and combine effectively sowing procedures, chemical protection and other both direct and preventive procedures.
|
|
| |
guest ::
