Abstract
The vegetables take a major place in the structure of the crops in Bulgaria. The climatic conditions in the country favour not only their growth and development, but also the mass spread series of diseases and pests. The effect of the contemporary plant protection systems for pest control is determined by the rational use of the potentialities of particular crops. In regard to this, the aim of this research was to study the influence of intercropping of some vegetables on the population density of their economically important pests. The scheme of the vegetable field included the following vegetables: onion-carrot; potato-beans; peas and caster-oil plant. The density of the major economically important pests related to the relevant crop was followed during the vegetative period: Onion - Onion fly (Helemiya antiqua Meig.) Carrot - Carot fly (Psyla rosae F.) Potato - Colorado potato beetle (Leptinotarsa decemlineata Say) Bean - Peas weevil (Acanthoscelides obtectus Say) Peas - The green pea aphid (Acyrthosiphon pisi Har.) The samples were collected by entomological sweepnet and by bush counting. On the basis of conducted study, it was determined, that some of the plant species act repellently on the density of economically important pests. With best qualities in this respect are: Onion - Carrot fly (Psyla rosae F.) Carrot - Onion fly (Helemiya antiqua Meig.) Peas - Colorado potato beetle (Leptinotarsa decemlineata Say) Caster-oil plant - The green pea aphid (Acyrthosiphon pisi Har.) The study of repellent behaviour of some plant species to different pest insects reveals new opportunities for decrease of chemical use, especially in vegetable-growing.
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Claims 5
Claim · model-written summary
Onion repelled carrot fly.
- Taxon
- Onion
Allium cepae0 - Interactor
- Psyla rosae F.e0pest
- Outcome
- Carrot flye0
- Direction
- best qualitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With best qualities in this respect are: Onion - Carrot fly (Psyla rosae F.)”
Claim · model-written summary
Carrot repelled onion fly.
- Taxon
- Carrot
Daucus carotae0 - Interactor
- Helemiya antiqua Meig.e0pest
- Outcome
- Onion flye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carrot - Onion fly (Helemiya antiqua Meig.)”
Claim · model-written summary
Peas repelled Colorado potato beetle.
- Taxon
- Peas
Lathyrus oleraceuse0 - Interactor
- Leptinotarsa decemlineata Say
Leptinotarsa decemlineatae0pest - Outcome
- Colorado potato beetlee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peas - Colorado potato beetle (Leptinotarsa decemlineata Say)”
Claim · model-written summary
Caster-oil plant repelled green pea aphid.
Verbatim
e0“Caster-oil plant - The green pea aphid (Acyrthosiphon pisi Har.)”
Claim · model-written summary
Repellent intercropping may reduce chemical use in vegetable growing.
Verbatim
e0“The study of repellent behaviour of some plant species to different pest insects reveals new opportunities for decrease of chemical use, especially in vegetable-growing.”