Green prevention and control of apple diseases and pests is crucial in non-bagged apple cultiva-tion,and is a key factor for ensuring apple revenue.However,there are several shortcomings in actual produc-tion,and the application of green prevention and control methods remains limited.To enhance the effectiveness of green preventation and control of deseases and pests in non-bagged cultivation,three agents(20%Hua iodine anti-adversity ecology membrane,5%carvacrol and 0.5%chitosan)were selected as test materials.A green preventation and control experiment was conducted using these agents on non-bagged apple trees.By spraying these agents seven times for diseases and pests green preventation and control,along with conventional chemical control agents,the effects of different diseases and pests methods on leaf growth,apple fruit surface chroma,sin-gle fruit weight,fruit quality,pest infestation rate,and pesticide residue were compared.The green prevention and control technologies and effects of non-bagged apple diseases and pests were investigated.The results showed that both treatment 1 and treatment 2 significantly reduced the harm rate of diseases and pests,with the diseased leaf rate of 26.09%and 31.03%,respectively,and the decreased insect leaf rates of 76.74%and 51.61%,respectively;Neither treatment affected the coloration of apple fruit surface,nor did they have all any sig-nificant effect on apple fruit shape index and fruit firmness.Treatment 1 had extremely significant effect on the single fruit weight and soluble solid content of apples,which were 61.430 g and 1.875%higher,respectively,but did not have significant effect on leaf growth;On the contrary,treatment 2 significantly promoted leaf growth,increased leaf thickness,fresh weight and dry weight by 10.88 mm,16..44 g and 6.80 g,respectively,but did not significanlty affected apple single fruit weight and soluble solids content..No pesticide residue was detected on red Fuji apples.This study could reduce the use of chemical pesticides 5 times and reduce the a-mount of use by 40.34%.The use of a combination of three types of agents as a green prevention and control technology for diseases and pests in non-bagged apple cultivation is an effective approach to promoting green fruit production,and shows promising application prospects.Green prevention and control of diseases and pests in non-bagged apple further enhances ecological and environmental protection,and yields green and safe prod-ucts.Future study will focus on green prevention and control technologies for non-bagged apple diseases and pests,increasing the demonstration area,and striving for large area promotion and application in non-bagged apple production.
Diseases and pestsGreen prevention and control agentsNon-bagged applesRed FujiRed GalaTrial effectApplication effect
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