Changes in the content of chlorophyll in leaves when using pesticides and microfertilizers

One of the ways to reduce the phytotoxicity of herbicides on cultivated plants is the use of trace element fertilizers. The article presents the results of research on the influence of liquid trace element fertilizers on the content of chlorophyll in leaves and the productivity of sugar beet. It was found that three days after the treatment of crops with herbicides together with microfertilizers, the amount of chlorophyll a and b pigments was 4% higher than when applying herbicides without microfertilizers. In the control version, where pesticides and microfertilizers were not applied, the content of chlorophyll in the leaves was 0.350% by weight. As the observations showed, the photosynthetic activity of sugar beet plants was restored 4-5 days after the treatment by herbicides. Herbicides, with the simultaneous introduction of micro-fertilizers, had a less negative effect on the photosynthesis of sugar beet than herbicides alone. The biological yield of root crops in the variant with the combined use of pesticides and microfertilizers was 56.36 t/ha. The polarization of sugar beet root crops with the combined use of pesticides and microfertilizers was 0.64% higher than in the variant without microfertilizers.

Effect of Formulated Fertilization on Fruit Quality of Early Ripe Peach

Using the early maturing peach variety 'Japan Matsusen' as the test material, nine groups of formula fertilization schemes were set up by orthogonal experiment to study the effects of different fertilization treatments on the quality of peach fruit, in order to obtain the best fertilization formula to improve fruit quality. The results showed that the quality of peach fruit was significantly improved by adding organic fertilizer to the base fertilizer instead of chemical fertilizer. Therefore, by adding organic fertilizer as the base fertilizer, reducing the application amount of chemical fertilizer, and adding other trace element fertilizers can effectively improve the quality of peach fruit.

The ecology of Oncopera fasciculata (Walker) (Lepidoptera: Hepialidae) in South Australia. 5. Changes in the environment of O. fasciculata associated with the development of country grey for Agriculture.

Before County Grey was developed for agriculture, Oncopera fasciculata (Walker) probably was restricted by excessive wetness to the higher, drier portions of the poorly drained soils, and by dryness to the lower, moister portions of the well-drained soils. Even in these places the insect probably was not able to maintain large numbers because suitable food was scarce. Steps in the development of the area for agriculture have included artificial drainage, clearing of woodland and scrub, the use of phosphatic and trace-element fertilizers, and the establishment of pastures consisting of subterranean clover (Trifolium subterraneum L.) and other introduced clovers and grasses. This development has provided a more favourable environment for O. fasciculata. Artificial drainage reduced the chances of exposure to excessive wetness, and the establishment of pastures composed of clovers and perennial grasses not only provided protection for the eggs and young larvae against evaporation, but also made available a greater amount of good-quality food for the larvae.