Impact evaluation of Neochetina spp. on different growth stages of waterhyacinth

• Autorzy: Ray P , Sushilkumar , Pandey A.K.

Warianty tytułu

PL

Ocena wplywu Neochetina spp. na rozne stadia rozwojowe Eichhornia crassipes

• Języki publikacji: EN

Abstrakty

EN

An attempt was made to optimize the minimum required inoculation load of the weevils on three growth stages of waterhyacinth, based on reduction of fresh biomass, number of leaves and ramifications. The small growth stage was controlled earlier than the waterhyacinth of middle growth stage, corresponding to the increase in number of weevils per plant. The large plants could not be controlled even with the inoculation pressure of 20 weevils per plant because of high growth rate. This study suggests that Neochetina spp. has the potential to keep the population of the macrophyte at a subeconomic density, through a basic inoculation load of weevils in due course of time.

PL

Podjęto próbę określenie optymalnej liczby chrząszczy Neochhetina spp., użytego do zwalczania Eichhornia crassipes w trzech fazach rozwojowych roślin biorąc pod uwagę: świeżą biomasę, liczbę liści i rozgałęzień. Zwalczanie E. crassipes we wczesnych fazach rozwoju następowało wcześniej niż zwalczanie roślin będących pełni rozwoju, co odpowiadało zwiększeniu liczby chrząszczy na roślinie. Dużych roślin nie można było zwalczyć nawet w przypadku wysokiego nasilenia występowania, wynoszącego 20 chrząszczy na roślinę z powodu szybkiego tempa wzrostu roślin. Te badania sugerują, że Neochetia spp. posiada potencjał utrzymania populacji E. crassipes poniżej ekonomicznego poziomu szkodliwości, co związane jest z ilością chrząszczy występujących na przestrzeni czasu.

Słowa kluczowe

EN

Eichhornia crassipes; weevil; biological control; water hyacinth; plant protection; Neochetina; feeding behaviour; growth stage

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2009
• Tom: 49
• Numer: 1
• Opis fizyczny: p.7-13,fig.,ref.

Twórcy

autor

Ray P

• National Research Centre for Weed Science, Maharajpur, Jabalpur, M.P., India

autor

Sushilkumar

autor

Pandey A.K.

Bibliografia

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