Integrated management for controlling red palm weevil
Abstract: Particular knowledge based on biological, ecological and control studied was contributed to the red palm weevil, Rhynchophorus ferrugineus (Oliv.). Laboratory and field studies revealed that the unit increase in temperature above threshold level was corresponded to the decrease in developmental parameter figures such as sex ratio, longevity and growth rates of R. ferrugineus survivors. Soft inner date palm tissues demonstrated the most preferendum food diet more than sugarcane stem slices and recommended artificial diet. Life table parameters revealed that temperature and food type strongly affected reproductive rate (R0), generation duration (Gt), intrinsic rate of increase (rm) and population doubling time (Dt).Field trials were completed on the changes in the population activity of this insect during two investigated seasons, i.e. 2001 & 2002. The careful integration of the data obtained revealed that adult occurrence in date palm fields took place all the year round thus extended from early of March until the end of November with distinct occurrence in summer months while scarce by numbers of R. ferrugineus adults were occurred during winter months. Monitoring the changes in the population cycle demonstrated two distinct broods; the 1st brood harbored the reliable numbers of adult and considered accordingly as period of ” effective occurrence during hot months, while the 2nd brood demonstrates few numbers of adults and accordingly identified as “ineffective emergence”. Four overlapping annual generations were assessed under field conditions.The combined effect of three main physical environmental factors governing the changes in the population activity of R. ferrugineus was studied by simply adopting the partial regression values were considered as dependant (Y) and independent variables x1, x2 and x3 . The ovicidal, larvicidal and adulticidal activities of four insecticides against eggs, larvae and adults stages of R. ferrugineus under laboratory conditions were estimated.Data revealed that profenofos (72% EC) proved to be the most potent compound followed by emamectin (5% SG), abamectin (1.8% EC) and lufenuron (50% EC) especially against one and two days old eggs. The advancement of embryogensis correlated negatively with the susceptibility of eggs to the four tested insecticides. Considering the larval stage, emamectin proved to be the most effective compound followed by profenofos, abamectin and lufenuron against all tested instars. The susceptibility of tested insecticides was negatively correlated with the progression of larval development. The efficiency of tested insecticides against adult stage showed that, emamectin was the most effective followed by profenofos, lufenuron and abamectin, respectively. As a general trend, larvae were the most susceptible stage followed by egg and adult stages, respectively. The obtained results revealed that there were significant differences between the tested compounds on the reproduction of females. The tested insecticides treated as LC50 against egg stage induced a drastic effect on the number of mature and immature oocytes in the ovaries of virgin females.
Publication year 2005
Availability location كلية الزراعة - عين شمس - القاهرة –مصر
Availability number
Organization Name
Country Egypt
Publisher Name: كلية الزراعة - عين شمس
Place: عين شمس - القاهرة –مصر
Author(s) from ARC
Agris Categories Protection of plants - General aspects
AGROVOC
TERMS		 Insecticides. Pesticidal properties. Rhynchophorus ferrugineus.
Publication Type PhD Thesis
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