Magistro tezių tema – infraraudonųjų spindulių poveikio augalams tyrimai. Darbo apimtis 48 puslapiai, 30 paveikslų, 3 lentelės. Rašant darbą, remtasi 46 literatūros šaltiniais. Tyrimų objektas – laboratorinių bandymų metu, buvo matuojama stiebo šerdies skersmens įkaitimo trmperatūra trijų rūšių piktžolių: trikertės žvaginės (Capsella bursa), žliūgės (Stellaria media) ir paprastosios žilės (Senecio vulgaris). Įkaitimo iki 70 °C temperatūra laikoma pakankama suardyti piktžolių ląstelėms, nes piktžolę veikiant aukšta temperatūra, jų ląstelės staiga įkaista, sukreša baltymai ir sutrūkinėja jų apvalkalai, todėl sutrinka medžiagų apykaita ir augalas žūsta. Šio darbo tikslas – ištirti piktžolių trikertės žvaginės, žliūgės ir paprastosios žilės šiluminį jautrumą naudojant infraraudonųjų spindulių įrenginį ir šio įrenginio efektyvumą. Laboratoriniais tyrimais nustatėme, kad kaitinant infraraudonųjų spindulių įrenginiu piktžolių stiebus greičiausiai iki 70 oC įkaista žliūgė (1,4 mm skersmens per 3s.),o lėčiausiai paprastoji žilė (1,45 mm skersmens per 10,8s ). Kai įrenginys trauktas 0,10 m/s greičiu, buvo sunaikintos visos piktžolės, o kai įrenginys trauktas 0,14 m/s – 75% piktžolių. Piktžolių naikinimo infraraudonaisiais spinduliais efektyvumas išryškėja po kelių dienų. Piktžolės jau neatsigauna, nes jos išdžiūsta. / Summary Subject of investigation – the infrared effects of plant Subject of investigation - the infrared effects of plant research. The text corpus constitutes of 48 pages, including 30 pictures and 3 tables, 46 literature sources are used Research laboratory tests, were measured in the core of the stem diameter of heating trmperatūra three types of weeds: Capsella bursa, Stellar media and the Senecio vulgaris. Warm to 70 ° C is considered sufficient to destroy the cells of weeds, because weeds in the high temperature, the cells suddenly heated, clotting proteins and crazy in their shells, and therefore violated the metabolism and the plant dies. The aim of this work - to examine weed clang, and the simple gray thermal sensitivity using infrared ray device and the device performance. Laboratory studies have found that the infrared heating device is likely to weed stems up to 70 ° C heated Stellar media (1,4 mm in diameter through 3s.), and the simple gray slowest (1,45 mm in diameter through 10,8 s). When the device is included in 0,1 m / s, all the weeds were destroyed, and the device included a 0,14 m / s - 75% of weeds. Weeding infrared efficiency become apparent after a few days. Weed is not already, and because they are killed.

Cranberry (Vaccinium macrocarpon Ait.) is a woody perennial crop that can remain productive for decades. Competition for resources between cranberries and weeds can depress cranberry farm yields, resulting in large annual crop losses. Renewed interest in reducing chemical inputs into cranberry systems has provided the motivation to evaluate methods, such as flame cultivation (FC), as potential nonchemical options for weed control. Also known as thermal weeding, FC exposes plants to brief periods of high temperature that causes the water in the plant tissue to expand rapidly, rupturing plant cells and leading to necrosis. Various FC methods have been used successfully in annual crops as both a preemergence and postemergence weed control, but few scientific reports have been published on the use of FC on perennial weeds in a woody perennial crop system. Dewberry (Rubus spp.), sawbrier (Smilax glauca), and common rush (Juncus effusus) are cranberry weeds that are difficult to control, spread quickly and can cause significant crop loss. Flame cultivation may be an effective non-chemical means for controlling these weeds in cranberry systems. FC would ideally be used as a spot treatment for weeds growing in the cranberry canopy, as well as on larger non-production areas where cranberry vines are not as abundant, such as bog edges, ditches, and dikes. Using FC to treat weeds within the cranberry canopy will likely cause localized damage to cranberry plants immediately surrounding the weeds, thus cranberry response to FC is also of interest. The following experiments were designed to examine the response of weeds and cranberry plants to FC. Perennial plants rely on reserves of nonstructural carbohydrates (NSC) for growth and survival, thus the efficacy of FC treatments to weeds will likely be impacted by the timing and frequency of treatments as they relate to the specific carbohydrate cycles of targeted weeds, such as dewberry. An additional experiment studied the seasonal fluctuations of NSC in dewberry roots. Cranberry growers were also surveyed on their past experiences with FC, as well as their willingness to adopt FC if proven an effective method for controlling weeds.