Factors related to native host abandonment by the coffee berry borer Hypothenemus hampei (Ferr.) (Col., Scolytidae)

Abstract

The coffee berry borer (CBB) Hj'pothenemus hanipei is a serious pest of coffee berries. The 'interseason' is the most critical period for this beetle because at this time the vast majority of remaining berries or new immature berries are unsuitable for the development of this pest. CBB abandons its native berry to search for another host berry. This work shows that some factors affect the abandonment of female and specifies some biological characteristics of the particular female of the interseason. The following results were observed. A positive correlation was established between insolation and abandonment. Abandonment increased when immature berries were present close to the infested berries.The fecundation rate of colonizing females was 93% and the average survival time without food after abandonment of the berry was around 1 1 days. A pattern of the survival strategy developed by CBB at the interseason is proposed.

Life table of Hypothenemus hampei (Ferrari) in relation to coffee berry phenology under Colombian field conditions

“…Mortality in ground berries was much higher than that found in a similar experiment under dry season conditions in Mexico (Baker et al, 1992a). Penados and Ochoa (1977) and Mathieu et al (1997) have demonstrated that females may delay oviposition as a mechanism of adaptation under unfavorable conditions. Klein-Koch et al (1988) found that in a high rainfall zone of Ecuador (3300 mm year -1 ) more than 80% of bored berries fallen to the ground were rotted and with a very low population of borers; ripe and overripe berries were the most affected.…”

O papel das armadilhas com semioquímicos no manejo da broca-do-café,Hypothenemus hampei

“…Tal preferência foi demonstrada em estudos em laboratório e no campo (MENDONZA-MORA, 1991;GIORDANENGO;FRÉROT, 1993;MATHIEU et al, 1997b;MATHIEU et al, 1991). Todavia, os resultados de estudos envolvendo a seleção de cores por fêmeas da broca-do-café são conflitantes, reforçando a hipótese de que vários fatores, além da cor, estão envolvidos no processo de localização e colonização de frutos de café por fêmeas de H. hampei (MENDONZA-MORA, 1991;FRÉROT, 1997a).…”

Comportamento sexual da broca-do-café, Hypothenemus hampei (Ferrari, 1867) (Coleoptera: Curculionidae: Scolytinae)

“…O comportamento de abandono do fruto é estimulado por diversos fatores, tais como: olfativos, ou seja, resposta aos voláteis emitidos por frutos de café; intensidade luminosa; umidade relativa do ar; cor do fruto; e estado fisiológico da fêmea (MATHIEU; BRUN; FRÉROT, 1997, MATHIEU et al, 2001). …”

“…Contudo, os machos nunca exibem esse comportamento (MATHIEU; BRUN; FRÉROT, 1997). Posteriormente, o processo de colonização irá depender das condições internas do fruto (DAMON, 2000, ORTIZ et al, 2004.…”

“…Entretanto, essa resposta, assim como o comportamento de abandono, varia com o estágio fisiológico do inseto. Nesse caso, somente fêmeas acasaladas que não iniciaram a oviposição, respondem positivamente aos voláteis dos frutos (MATHIEU; BRUN; FRÉROT, 1997, MATHIEU et al, 2001. Além disso, a intensidade da resposta varia com o estágio de amadurecimento do fruto, sendo preferidos frutos maduros ao invés de verdes ou secos (GIORDANENGO; BRUN; FRÉROT et al, 1993).…”