عنوان

Raptor-mimicking kites for reducing bird damage to wine grapes

شماره

LA9932206x

زبان متن نوشتاري يا گفتاري و مانند آن

انگلیسی

عنوان اصلي

Raptor-mimicking kites for reducing bird damage to wine grapes

نام عام مواد

[Article]

نام نخستين پديدآور

Hothem, Roger L.; DeHaven, Richard W.

متن يادداشت

Preliminary tests in California vineyards during 1979 and 1980 indicated that a raptor-mimicking kite suspended from a helium-filled balloon (kite-balloon or KB) could reduce bird damage to ripening wine grapes. Based on the results of both damage assessments and bird censuses, one KB per hectare, deployed for alternate 1-wk periods, reduced losses caused by birds by about 33% in 1979 and by an average of 48% in 1980 when compared with 1-wk control periods. Habituation by the birds to the KB appeared to reduce its effectiveness over time in 1979, but this problem was reduced in 1980 by regularly changing the KB components and deployment methods. Based on tests conducted in 1981, polyurethane tetroons (PTs) were the longest lasting of four balloons currently available for use in KBs, but in high winds they flew too close to the ground to keep kites aloft. Spherical balloons made of rubber had better flight characteristics but shorter longevity than the PTs. More testing is needed to evaluate the effectiveness of KBs for protecting entire vineyards during whole-season tests and to identify situations where their use may be cost-effective.

تاريخ نشر

1982

عنوان

Proceedings of the Vertebrate Pest Conference

شماره جلد

10

عنصر شناسه اي

Hothem, Roger L.; DeHaven, Richard W.

نام الکترونيکي

نوع ماده

[Article]

کد کاربرگه

275578

سطح دسترسي

a

تكميل شده

Y