DOI: https://doi.org/10.56669/LWUO5639
ABSTRACT
One of the efforts to support the success of reclamation of ex-silca sand mining land is site quality improvement. The objective of this research was to analyze the effect of application of Arbuscular Mycorrhizal Fungi (AMF) and soil...
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2023.01.06
1,442
DOI: https://doi.org/10.56669/GTET9251
ABSTRACT
Farmers have always found various ways to improve the yields of their crops. It could have been new seed varieties, planting methods, timing, irrigation, pest and disease control and plant nutrients. The use of biological products in...
2019.04.01
33
Biopesticides and biofertilizers are the natural, environmentally friendly alternative to chemical pesticides and synthetic fertilizers. Biofertilizers can make better soil condition, healthier plants growth, and enhance sustainable environment. By the late March 2019, there are 33 biofertilizer...
Author: PAN Fan, GAO Li-jie, ZHU Kai-hui, DU Gui-lin, ZHU Meng-meng, ZHAO Li, GAO Yu-lin, TU Xiong-bing, ZHANG Ze-hua
Abstract:
https://www.sciencedirect.com/science/article/pii/S2095311922001484
The efficacies of biological and conventional chemical insecticides against two major insect pests of alfalfa (aphids and thrips) were compared in three sites across China’s alfalfa belt. In addition, the persistence of the residues of chemical insecticides in alfalfa and their influence on the quality of alfalfa hay were examined. Efficacy varied among the different biological and chemical insecticides. The chemical insecticides were significantly more effective than biopesticides in a short time-frame. The efficacy period of biopesticides was significantly longer than that of chemical insecticides, and the corrected mortality rate of aphids in all regions was above 50% at 14 days after application. The analysis of pesticide residues showed that the residual doses of all the pesticides were within the allowed ranges after the safe period. The acid detergent fiber and neutral detergent fiber contents in alfalfa hay were higher and the protein content was lower in chemical insecticide treatments than in biopesticide treatments in Hebei. The relative feeding value of alfalfa hay treated with Metarhizium anisopliae IPP330189 was the highest among the treatments. Compared with chemical insecticides, the yield of alfalfa hay was higher in the biopesticides treatments. Biopesticides show a stronger control effect on insect populations and also a better improvement in the quality of alfalfa hay than chemical insecticides. This study provides a basis for exploring and developing a comprehensive control regime for alfalfa insect pests in the different alfalfa-growing regions in China, and for reducing chemical insecticide usage and improving forage quality.