Spiromesifen toxicity to the spider mite Tetranychus urticae and selectivity to the predator Neoseiulus californicus
Tetranychus urticae Koch (Acari: Tetranychidae) is a major pest of several agricultural crops and Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) is an important natural enemy of this pest mite. The objective of the study was to evaluate the effect of spiromesifen on the development and rep...
Saved in:
Published in | Phytoparasitica Vol. 39; no. 5; pp. 437 - 445 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.11.2011
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Tetranychus urticae
Koch (Acari: Tetranychidae) is a major pest of several agricultural crops and
Neoseiulus californicus
(McGregor) (Acari: Phytoseiidae) is an important natural enemy of this pest mite. The objective of the study was to evaluate the effect of spiromesifen on the development and reproduction of
T. urticae
, and to assess the influence of spiromesifen and other acaricides on the population growth rates of the spider mite and its predator,
N. californicus
. Toxicity tests with spiromesifen at different life stages of
T. urticae
indicated that eggs less than 72 h old were more sensitive than other development stages. The oviposition rate of
T. urticae
was significantly affected by spiromesifen. Experiments on the effects of spiromesifen on the growth rates of
T. urticae
and
N. californicus
indicated that spiromesifen is innocuous to the predaceous mite but highly toxic to the spider mite, leading to population suppression in 10 days. Fenpropathrin, acephate and neem oil were not harmful to
N. californicus
, but were not so efficient as spiromesifen in controlling
T. urticae
, and had significantly less influence on the population growth rates of the spider mite. Among these three products, only neem oil caused significant reduction in the growth rate of
T. urticae
. Chlorfenapyr, abamectin, milbemectin and diafenthiuron significantly affected the population growth rates of
T. urticae
and
N. californicus
. Spiromesifen was the most promising acaricide for managing the two-spotted spider mite, when used in combination with
N. californicus
. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0334-2123 1876-7184 |
DOI: | 10.1007/s12600-011-0189-x |