Insecticide screening program for catfacing insects on peaches - 1973

UF00076547.pdf

AGRICUIJU1AL RESEARM CH cER, NONTICELtO
0



Monticello, Florida ,

Monticello ARC Research Report BB 1973-2 August 1, \J93

INSECTICIDE SCREENING PROGRAM FOR CATFACING INSECTS ON PEACHES - 1973 1

Sam S. Fluker
Assistant Entomologist 2For this program 288 peach trees of the Rio Grande variety

were selected for testing. The trees were 6 years old and in their 4th fruiting season. They are located at the Peaches of

Florida Orchard in Madison County and are part of an orchard

that has been maintained as a commercial enterprise since planting.

There were 7 insecticides used for this test. The materials

used without approved common names are:
Phosvel 0-(2,5-Dichloro-4-bromophenyl) 0-methylphenylthiophosphate Imidan 0,0-dimethyl S-phthalimidomethyl phosphorodithioate

Zectran 4-dimethylamino-3,5 -xylyl methylcarbamate
(R)
The materials were applied to the trees using a Solo

Model 423, Mistblower. The test materials were mixed for and applied at a 24x concentration. Each tree received 10 oz. of

formulated material during each application. Benlate(R)

(benomyl fungicide). was used throughout the test period as

protection against various diseases. Table 1 lists the dates

* and rates that the various materials were applied.

Samples consisted of inspecting each fruit from every tree
and recording its condition, either insect damaged or undamaged.







-2-


W The results of the tests are shown in Table 2. Of the insecticides tested Phosvel, Parathion (applied every 7 days), encapsulated methyl parathion (applied every 21 days), and

endosuif an gave significantly better control than the other insecticides. However, parathion when applied every 7 days

induced severe phytotoxicity to the trees. None of the other

materials tested were phytotoxic. Endosulfan was applied to the

trees only 2 times which is according to its registration on

peaches.

The test trees as a whole had considerably less insect

damage this year as compared to 1972. The lack of insect damage

this year is attributed to the low temperatures that occurred

* in March and the extremely heavy rains that occurred in March,

April, and May.

The results of this screening program indicate that with

proper timing a grower can apply as little as two applications

of an insecticide and achieve excellent insect control. The

data of Table 2 indicates that significant differences exist in

the effectiveness of the materials in this test. However, the

data clearly shows a significant difference in effectiveness

between all test materials and the check trees which received

only Benlate during this program.







-3-


TABLE 1.


Dates and rate at which the material was applied, 1973.


formulated


Formulation


Material


Oz. A.I./ 100 aals.


Dates Applied


Phoselah Apl19


March 5, 19
April 30 May 21


Parathion (7 day interval) Methyl Parathion (14 day interval)


Endosulfan


March 5, 12, 19, 26 April 2, 9, 16, 23, 30 May 7, 21


March 5, April 2, May 14

March 5 April 30


Misible


19
16, 30


Imidan 70%


Methomyl



Parathion (14 day interval)


*M. Parathion


March 3, 19 April 30 May 21

March 5, 19 April 30 May 21

March 5, 19
April 2, 16, May 14

March 5, 19 April 30 May 21

March 5, 19 April 30 May 21

March 5, 26 April 16 May 7, 21

March 5, 19 April 30 May 21

March 5, 19, May 21, 29


Zectran


*M. Parathion (21 day interval)


Imidan 50%


Benlate


*Encapsulated


Phosvel






-4-


TABLE 2. Effectiveness of seven insecticides against the
catfacing insects of peaches. Peaches of Florida
Orchard, Madison County, Florida, 1973.


Mean (%) fruit wth
insect inlury--"


Material


Phosvel Parathion (7 day interval) Methyl Parathion (21 day interval) (2) Endosulfan Imidan 70% WP Methomyl Parathion (14 day interval) Methyl Parathion Zectran Methyl Parathion (14 day interval) (2) Imidan 50% WP Check


0.239a 0.258a 0.425a 0.442a

0. 699ab 0.912ab l.032ab 1.915abc 2.770bc 3.664c 4.016c 9.324d


(1)Materials which are not significantly different at the 1%
level are followed by the same letter, according to Duncan's
test.
(2) Encapsulated









200 cc
August 15, 1973


Material


. . . W

PAGE 1

, -~ ---------------------------------AGR!CULTURAL RESEARCH CENTER, MONTICELLO Monticello, Florida Monticello ARC Research Report BB 1973-2 INSECTICIDE SCREENING PROGRAI1 FOR CATFACING INSECTS ON PEACHES 1973 Sams. Fluker Assistant Entomologist were selected for testing. The trees were 6 years old and in their 4th fruiting season. They are located at the Peaches of Florida Orchard in Madison County and are part of an orchard that has been maintained as a commercial enterprise since plant ing There were 7 insecticides used for this test. The materials used without approved common names are: Phosvel Imidan Zectran 0-(2,5-Dichloro-4-bromophenyl) 0-methylphenylthiophosphate 0,0-dimethyl S-phthalimidomethyl phosphorodithioate 4-dimethylamino-3,5-xylyl methylcarbamate (R) The materials were applied to the trees using a Solo , Model 423, Mistblower. The test materials were mixed for and applied at a 24x concentration. Each tree received 10 oz. of formulated material during each application. Benlate(R) (benomyl fungicide) . was used throughout the test period as protection against various diseases. Table 1 lists the dates and rates that the various materials were applied Samples consisted of inspecting each fruit from every tree and recording its condition, either insect damaged or undamaged.

PAGE 2

. ..,. ..... ...... . ------=----: ----c--------2The results of the tests are shown in Table 2. Of the insect icides tested Phosvel, Parathion (applied every 7 days), en capsulated methyl parathion (applied every 21 days), and endosulfan gave significantly better control than the other insecticides. However, parathion when applied every 7 days induced severe phytotoxicity to the trees. None of the other materials tested were phytotoxic. Endosulfan was applied to the . trees only 2 times which is according to its registration on peaches . The test trees as a whole had considerably less insect damage this year as compared to 1972. The lack of insect damage this year is attributed to the low temperatures that occurred in March and the extremely heavy rains that occurred in March, April, and Hay. The results of this screening program indicate that with proper timing a grower can apply as little as two applications of an insecticide and achieve excellent insect control. The data of Table 2 indicates that significant differences exist in the effectiveness of the materials in this test. However, the data clearly shows a significant difference in effectiveness between all test materials and the check trees which received only Benlate during this program

PAGE 3

.. . .. -3TABLE 1 Dates and rate at which the formulated material was applied, 19730 FormOz. Ao!o/ Material ulation 100 gals. Dates Applied Phosvel EC 12 March 5, 19 April 30 May 21 Parathion EC 5.3 March 5, 12, 19, 26 (7 day interval) April 2, 9, 16, 23, 30 May 7, 21 Methyl Parathion LS 4 March 5, 19 (14 day interval) April 2, 16, 30 May 14 Endosulfan Misible 12 March 5 April 30 Imidan 70% WP 8 March 3, 19 April 30 May 21 Methomyl WP 2 March 5, 19 April 30 May 21 Parathion EC 5.3 March 5, 19 (14 day interval) April 2, 16, 30 May 14 *M. Parathion LS 4 March 5, 19 April 30 May 21 Zectran EC 8 March 5, 19 April 30 May 21 *M. Parathion LS 4 March 5, 26 (21 day interval) April 16 May 7, 21 Imidan 50% WP 8 March 5, 19 April 30 May 21 Benlate WP l March 5, 19, 26 May 21, 29 * Encapsulated

PAGE 4

-4TABLE 2. Effectiveness of seven insecticides against the catfacing insects of peaches. Peaches of Florida Orchard, Madison County, Florida, 1973. . Material Phosvel Parathion (7 day interval) Methyl Parathion (21 day interval) < 2 > Endosulfan Imidan 70% WP Methomyl Parathion (14 day interval) Methyl Parathion Zectran . Methyl Parathion (14 d~y interval) < 2 > Imidan 50% WP Check Mea~ (%) f:u~t wttr insect inJury 0.239a 0.258a 0.425a 0.442a 0.699ab 0.912ab l.032ab l.915abc 2.770bc 3.664c 4.016c 9.324d (l)Materials which are not significantly different at the 1% level are followed by the same letter, according to Duncan's test. (2) Encapsulated 200 cc August 15, 1973


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