S13 - Session P3 - Preparation and Efficacy of Plant-Derived Insecticides and Herbicides

Authors: Junsong Liu *

Petroleum agriculture has led to the indiscriminate use of chemical pesticides and herbicides in the production of horticultural plants worldwide, contributing to ecological and food security. In this study, two plant-derived insecticides and one plant-derived herbicide were developed to replace traditional chemical insecticides and herbicides, and their preliminary effects were reported here. Lvsu-I water agent is made of dried fruits of annual Solanaceae plants and dried bulbs of 2-year Allium genus of Liliaceae, which are native to China. After washing, purified water is added to make pulping. The secondary metabolite is extracted and filtered with fermented Chinese grain and diluted with purified water. In the summer of 2018, a sample of B. brassicae from Shaanxi Province, China was sprayed with 300x Lvsu-I aqueous solution and 3.0% Avermectin emulsion as a control area. The investigation showed that the killing rate was 91.84+-0.28% on the 10th day, and the killing rate of Avermectin in the control area was 93.09+-1.73, with no difference between the two. Yamandi water agent was prepared in the same way as Lvsu-I. In the spring of 2018, the leaves of Japanese toon aphids from Wuhan, China were sprayed with 1:1 (aphid mite dihydrate: a variety of plant lactic acid) before use, and the killing rate was 100% on the 7th day. Herbicide: 50% diluent was used to spray tea garden weeds with residual plant liquid after heat power generation from a biomass plant in Wuhan, China. According to the investigation, on the 7th day, 95% of Oregano, 87% of Polygonum, 99% of Eragrostis ferruginea, 35% of Plantain, and 20% of tea were eliminated. The mechanisms of insecticide and weed control remain to be studied.